./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:57:26,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:57:26,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:57:27,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:57:27,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:57:27,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:57:27,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:57:27,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:57:27,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:57:27,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:57:27,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:57:27,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:57:27,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:57:27,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:57:27,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:57:27,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:57:27,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:57:27,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:57:27,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:57:27,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:57:27,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:57:27,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:57:27,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:57:27,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:57:27,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:57:27,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:57:27,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:57:27,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:57:27,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:57:27,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:57:27,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:57:27,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:57:27,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:57:27,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:57:27,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:57:27,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:57:27,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:57:27,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:57:27,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:57:27,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:57:27,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:57:27,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:57:27,115 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:57:27,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:57:27,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:57:27,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:57:27,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:57:27,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:57:27,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:57:27,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:57:27,119 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:57:27,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:57:27,120 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:57:27,120 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:57:27,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:57:27,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:57:27,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:57:27,121 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:57:27,121 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:57:27,121 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:57:27,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:57:27,122 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:57:27,122 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:57:27,122 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:57:27,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:57:27,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:57:27,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:57:27,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:57:27,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:57:27,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:57:27,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:57:27,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:57:27,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:57:27,125 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:57:27,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:57:27,125 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:57:27,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:57:27,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:57:27,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:57:27,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:57:27,444 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:57:27,444 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:57:27,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-30 04:57:28,613 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:57:28,811 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:57:28,812 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-30 04:57:28,819 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a5d46407/3d29059d85a14a6a8c2655a54820efaa/FLAG0f2b5c45b [2023-08-30 04:57:28,834 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a5d46407/3d29059d85a14a6a8c2655a54820efaa [2023-08-30 04:57:28,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:57:28,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:57:28,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:28,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:57:28,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:57:28,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:28" (1/1) ... [2023-08-30 04:57:28,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27da4982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:28, skipping insertion in model container [2023-08-30 04:57:28,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:28" (1/1) ... [2023-08-30 04:57:28,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:57:28,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:57:29,039 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-30 04:57:29,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:29,067 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 04:57:29,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ccbcdc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:29, skipping insertion in model container [2023-08-30 04:57:29,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:29,069 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:57:29,071 INFO L158 Benchmark]: Toolchain (without parser) took 232.14ms. Allocated memory is still 81.8MB. Free memory was 57.6MB in the beginning and 47.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 04:57:29,072 INFO L158 Benchmark]: CDTParser took 0.80ms. Allocated memory is still 58.7MB. Free memory is still 36.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:57:29,072 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.91ms. Allocated memory is still 81.8MB. Free memory was 57.4MB in the beginning and 47.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:57:29,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80ms. Allocated memory is still 58.7MB. Free memory is still 36.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.91ms. Allocated memory is still 81.8MB. Free memory was 57.4MB in the beginning and 47.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:57:30,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:57:30,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:57:30,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:57:30,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:57:30,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:57:30,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:57:30,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:57:30,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:57:30,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:57:30,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:57:30,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:57:30,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:57:30,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:57:30,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:57:30,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:57:30,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:57:30,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:57:30,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:57:30,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:57:30,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:57:30,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:57:30,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:57:30,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:57:30,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:57:30,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:57:30,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:57:30,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:57:30,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:57:30,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:57:30,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:57:30,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:57:30,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:57:30,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:57:30,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:57:30,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:57:30,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:57:30,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:57:30,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:57:30,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:57:30,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:57:30,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:57:30,722 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:57:30,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:57:30,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:57:30,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:57:30,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:57:30,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:57:30,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:57:30,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:57:30,725 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:57:30,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:57:30,726 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:57:30,726 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:57:30,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:57:30,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:57:30,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:57:30,727 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:57:30,728 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:57:30,728 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:57:30,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:57:30,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:57:30,728 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:57:30,729 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:57:30,729 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:57:30,729 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:57:30,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:57:30,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:57:30,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:57:30,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:57:30,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:57:30,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:57:30,730 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:57:30,731 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:57:30,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:57:30,731 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:57:30,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:57:30,732 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:57:30,732 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:57:30,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:57:31,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:57:31,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:57:31,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:57:31,078 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:57:31,078 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:57:31,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-30 04:57:32,279 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:57:32,477 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:57:32,478 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-30 04:57:32,487 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc08ffb34/4d93c93dc5f44a33b3575188546a4c91/FLAG31d61f4ec [2023-08-30 04:57:32,501 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc08ffb34/4d93c93dc5f44a33b3575188546a4c91 [2023-08-30 04:57:32,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:57:32,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:57:32,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:32,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:57:32,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:57:32,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9ef946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32, skipping insertion in model container [2023-08-30 04:57:32,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:57:32,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:57:32,718 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-30 04:57:32,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:32,749 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:57:32,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:57:32,781 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-30 04:57:32,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:32,793 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:57:32,820 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-30 04:57:32,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:32,849 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:57:32,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32 WrapperNode [2023-08-30 04:57:32,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:32,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:57:32,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:57:32,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:57:32,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,915 INFO L138 Inliner]: procedures = 27, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 194 [2023-08-30 04:57:32,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:57:32,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:57:32,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:57:32,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:57:32,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,970 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:57:32,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:57:32,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:57:32,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:57:32,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (1/1) ... [2023-08-30 04:57:32,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:57:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:57:33,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:57:33,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:57:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:57:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:57:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:57:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:57:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:57:33,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:57:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:57:33,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:57:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:57:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:57:33,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:57:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:57:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:57:33,043 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:57:33,172 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:57:33,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:57:33,671 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:57:33,684 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:57:33,684 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 04:57:33,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:57:33 BoogieIcfgContainer [2023-08-30 04:57:33,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:57:33,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:57:33,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:57:33,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:57:33,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:57:32" (1/3) ... [2023-08-30 04:57:33,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6335ef14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:57:33, skipping insertion in model container [2023-08-30 04:57:33,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:32" (2/3) ... [2023-08-30 04:57:33,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6335ef14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:57:33, skipping insertion in model container [2023-08-30 04:57:33,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:57:33" (3/3) ... [2023-08-30 04:57:33,693 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-08-30 04:57:33,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:57:33,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-30 04:57:33,708 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:57:33,813 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:57:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 518 flow [2023-08-30 04:57:33,959 INFO L130 PetriNetUnfolder]: 21/249 cut-off events. [2023-08-30 04:57:33,960 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:57:33,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 249 events. 21/249 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 376 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2023-08-30 04:57:33,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 251 transitions, 518 flow [2023-08-30 04:57:33,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 245 transitions, 502 flow [2023-08-30 04:57:33,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:57:33,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 245 transitions, 502 flow [2023-08-30 04:57:33,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 245 transitions, 502 flow [2023-08-30 04:57:33,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 245 transitions, 502 flow [2023-08-30 04:57:34,040 INFO L130 PetriNetUnfolder]: 21/245 cut-off events. [2023-08-30 04:57:34,041 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:57:34,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 245 events. 21/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 376 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2023-08-30 04:57:34,048 INFO L119 LiptonReduction]: Number of co-enabled transitions 6816 [2023-08-30 04:57:50,165 INFO L134 LiptonReduction]: Checked pairs total: 7338 [2023-08-30 04:57:50,166 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-08-30 04:57:50,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:57:50,181 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;@1e4f5c6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:57:50,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-30 04:57:50,184 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:57:50,184 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:57:50,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:50,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:57:50,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:57:50,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash 32138, now seen corresponding path program 1 times [2023-08-30 04:57:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:50,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632530983] [2023-08-30 04:57:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:50,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:50,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:50,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 04:57:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:57:50,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:50,420 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:57:50,421 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:57:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:50,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:50,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:50,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632530983] [2023-08-30 04:57:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632530983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:50,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:57:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139901334] [2023-08-30 04:57:50,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:50,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:57:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:57:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:57:50,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-08-30 04:57:50,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:50,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:50,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-08-30 04:57:50,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:51,190 INFO L130 PetriNetUnfolder]: 909/1497 cut-off events. [2023-08-30 04:57:51,190 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:57:51,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3050 conditions, 1497 events. 909/1497 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 7419 event pairs, 770 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 1376. Up to 751 conditions per place. [2023-08-30 04:57:51,202 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 73 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-08-30 04:57:51,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 77 transitions, 332 flow [2023-08-30 04:57:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:57:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:57:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-08-30 04:57:51,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543761638733706 [2023-08-30 04:57:51,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-08-30 04:57:51,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-08-30 04:57:51,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:51,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-08-30 04:57:51,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,242 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 732 transitions. [2023-08-30 04:57:51,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 77 transitions, 332 flow [2023-08-30 04:57:51,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:57:51,248 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 116 flow [2023-08-30 04:57:51,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-30 04:57:51,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-30 04:57:51,252 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 116 flow [2023-08-30 04:57:51,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:51,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:57:51,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 04:57:51,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:51,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:57:51,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 32136, now seen corresponding path program 1 times [2023-08-30 04:57:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:51,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115234063] [2023-08-30 04:57:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:51,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:51,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:51,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:51,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 04:57:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:57:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:51,562 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:57:51,563 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:57:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:51,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:51,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:51,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115234063] [2023-08-30 04:57:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115234063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:51,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:51,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:57:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643853454] [2023-08-30 04:57:51,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:51,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:57:51,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:57:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:57:51,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 537 [2023-08-30 04:57:51,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:51,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 537 [2023-08-30 04:57:51,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:51,988 INFO L130 PetriNetUnfolder]: 909/1493 cut-off events. [2023-08-30 04:57:51,988 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:57:51,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 1493 events. 909/1493 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 7573 event pairs, 770 based on Foata normal form. 2/525 useless extension candidates. Maximal degree in co-relation 1499. Up to 1493 conditions per place. [2023-08-30 04:57:51,995 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 04:57:51,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 194 flow [2023-08-30 04:57:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:57:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:57:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2023-08-30 04:57:51,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43265052762259465 [2023-08-30 04:57:51,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2023-08-30 04:57:51,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2023-08-30 04:57:51,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:51,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2023-08-30 04:57:52,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,004 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 116 flow. Second operand 3 states and 697 transitions. [2023-08-30 04:57:52,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 194 flow [2023-08-30 04:57:52,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:57:52,006 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 106 flow [2023-08-30 04:57:52,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-30 04:57:52,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-08-30 04:57:52,007 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 106 flow [2023-08-30 04:57:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:52,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:57:52,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:52,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:52,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:57:52,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1001766, now seen corresponding path program 1 times [2023-08-30 04:57:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268209219] [2023-08-30 04:57:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:52,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:52,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 04:57:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:57:52,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:52,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:52,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268209219] [2023-08-30 04:57:52,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268209219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:52,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:52,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:57:52,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204245542] [2023-08-30 04:57:52,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:52,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:57:52,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:57:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:57:52,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-30 04:57:52,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:52,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-30 04:57:52,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:52,601 INFO L130 PetriNetUnfolder]: 455/750 cut-off events. [2023-08-30 04:57:52,601 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 04:57:52,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 750 events. 455/750 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3222 event pairs, 385 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 1514. Up to 749 conditions per place. [2023-08-30 04:57:52,614 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-30 04:57:52,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 182 flow [2023-08-30 04:57:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:57:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:57:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-08-30 04:57:52,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388578522656735 [2023-08-30 04:57:52,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-08-30 04:57:52,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-08-30 04:57:52,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:52,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-08-30 04:57:52,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,624 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 106 flow. Second operand 3 states and 707 transitions. [2023-08-30 04:57:52,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 182 flow [2023-08-30 04:57:52,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:57:52,625 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 119 flow [2023-08-30 04:57:52,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-30 04:57:52,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-30 04:57:52,627 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 119 flow [2023-08-30 04:57:52,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:52,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:52,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:57:52,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:52,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:52,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:57:52,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1000578, now seen corresponding path program 1 times [2023-08-30 04:57:52,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899984289] [2023-08-30 04:57:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:52,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:52,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:52,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:52,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 04:57:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:52,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:57:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:52,947 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:57:52,948 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:57:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:52,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:57:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:53,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:53,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899984289] [2023-08-30 04:57:53,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899984289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:57:53,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:57:53,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:57:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369615101] [2023-08-30 04:57:53,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:57:53,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:57:53,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:53,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:57:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:57:53,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-30 04:57:53,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:53,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:53,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-30 04:57:53,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:55,642 INFO L130 PetriNetUnfolder]: 1817/2985 cut-off events. [2023-08-30 04:57:55,643 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 04:57:55,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 2985 events. 1817/2985 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 17023 event pairs, 1540 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 6040. Up to 749 conditions per place. [2023-08-30 04:57:55,666 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 132 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-08-30 04:57:55,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 145 transitions, 676 flow [2023-08-30 04:57:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:57:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:57:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1429 transitions. [2023-08-30 04:57:55,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435133457479826 [2023-08-30 04:57:55,670 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1429 transitions. [2023-08-30 04:57:55,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1429 transitions. [2023-08-30 04:57:55,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:55,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1429 transitions. [2023-08-30 04:57:55,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 238.16666666666666) internal successors, (1429), 6 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,681 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 119 flow. Second operand 6 states and 1429 transitions. [2023-08-30 04:57:55,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 145 transitions, 676 flow [2023-08-30 04:57:55,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 145 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:57:55,687 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 207 flow [2023-08-30 04:57:55,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-30 04:57:55,689 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-30 04:57:55,689 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 207 flow [2023-08-30 04:57:55,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:55,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:57:55,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:55,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:55,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:57:55,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 961725897, now seen corresponding path program 1 times [2023-08-30 04:57:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76733714] [2023-08-30 04:57:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:55,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:55,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:55,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 04:57:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:57:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:57:55,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:57:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:57:56,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:56,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76733714] [2023-08-30 04:57:56,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76733714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:57:56,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:57:56,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-30 04:57:56,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527280324] [2023-08-30 04:57:56,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:57:56,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:57:56,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:57:56,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:57:56,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-08-30 04:57:56,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:56,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:56,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-08-30 04:57:56,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:56,656 INFO L130 PetriNetUnfolder]: 455/756 cut-off events. [2023-08-30 04:57:56,656 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 04:57:56,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 756 events. 455/756 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3222 event pairs, 385 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1560. Up to 747 conditions per place. [2023-08-30 04:57:56,664 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 34 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2023-08-30 04:57:56,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 275 flow [2023-08-30 04:57:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:57:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:57:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1360 transitions. [2023-08-30 04:57:56,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42209807572936064 [2023-08-30 04:57:56,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1360 transitions. [2023-08-30 04:57:56,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1360 transitions. [2023-08-30 04:57:56,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:56,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1360 transitions. [2023-08-30 04:57:56,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.66666666666666) internal successors, (1360), 6 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:56,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:56,679 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:56,679 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 207 flow. Second operand 6 states and 1360 transitions. [2023-08-30 04:57:56,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 275 flow [2023-08-30 04:57:56,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 259 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:57:56,681 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 223 flow [2023-08-30 04:57:56,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-08-30 04:57:56,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-08-30 04:57:56,682 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 223 flow [2023-08-30 04:57:56,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:56,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:56,683 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:57:56,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:56,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:56,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:57:56,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:56,896 INFO L85 PathProgramCache]: Analyzing trace with hash -252281974, now seen corresponding path program 2 times [2023-08-30 04:57:56,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:56,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497824959] [2023-08-30 04:57:56,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:57:56,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:56,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:56,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 04:57:56,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:57:56,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:57:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:57,043 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:57:57,044 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:57:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:57,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:57:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:57,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:57,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497824959] [2023-08-30 04:57:57,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497824959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:57:57,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:57:57,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:57:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043878269] [2023-08-30 04:57:57,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:57:57,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:57:57,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:57:57,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:58:00,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-30 04:58:00,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:00,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:00,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-30 04:58:00,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:00,762 INFO L130 PetriNetUnfolder]: 909/1501 cut-off events. [2023-08-30 04:58:00,762 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 04:58:00,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1501 events. 909/1501 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 7567 event pairs, 770 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 3096. Up to 749 conditions per place. [2023-08-30 04:58:00,770 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 68 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2023-08-30 04:58:00,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 497 flow [2023-08-30 04:58:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:58:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:58:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1574 transitions. [2023-08-30 04:58:00,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41872838520883215 [2023-08-30 04:58:00,776 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1574 transitions. [2023-08-30 04:58:00,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1574 transitions. [2023-08-30 04:58:00,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:00,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1574 transitions. [2023-08-30 04:58:00,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 224.85714285714286) internal successors, (1574), 7 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:00,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:00,799 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:00,799 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 223 flow. Second operand 7 states and 1574 transitions. [2023-08-30 04:58:00,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 497 flow [2023-08-30 04:58:00,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 454 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 04:58:00,803 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 239 flow [2023-08-30 04:58:00,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-30 04:58:00,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-08-30 04:58:00,805 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 239 flow [2023-08-30 04:58:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:00,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:00,807 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1] [2023-08-30 04:58:00,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:01,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:01,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:01,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:01,017 INFO L85 PathProgramCache]: Analyzing trace with hash 769197698, now seen corresponding path program 3 times [2023-08-30 04:58:01,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:01,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343203603] [2023-08-30 04:58:01,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:58:01,017 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 [2023-08-30 04:58:01,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:01,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:01,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 04:58:01,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 04:58:01,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:58:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:01,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:01,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:01,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343203603] [2023-08-30 04:58:01,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343203603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:01,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:01,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 04:58:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730190001] [2023-08-30 04:58:01,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:01,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 04:58:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 04:58:01,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 04:58:02,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2023-08-30 04:58:02,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 239 flow. Second operand has 14 states, 14 states have (on average 218.0) internal successors, (3052), 14 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:02,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:02,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2023-08-30 04:58:02,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:02,621 INFO L130 PetriNetUnfolder]: 453/754 cut-off events. [2023-08-30 04:58:02,621 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 04:58:02,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 754 events. 453/754 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3223 event pairs, 385 based on Foata normal form. 6/276 useless extension candidates. Maximal degree in co-relation 1565. Up to 744 conditions per place. [2023-08-30 04:58:02,625 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 32 selfloop transitions, 12 changer transitions 0/44 dead transitions. [2023-08-30 04:58:02,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 44 transitions, 285 flow [2023-08-30 04:58:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:58:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:58:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1788 transitions. [2023-08-30 04:58:02,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41620111731843573 [2023-08-30 04:58:02,631 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1788 transitions. [2023-08-30 04:58:02,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1788 transitions. [2023-08-30 04:58:02,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:02,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1788 transitions. [2023-08-30 04:58:02,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 223.5) internal successors, (1788), 8 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:02,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:02,642 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:02,642 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 239 flow. Second operand 8 states and 1788 transitions. [2023-08-30 04:58:02,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 44 transitions, 285 flow [2023-08-30 04:58:02,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 245 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-30 04:58:02,644 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 191 flow [2023-08-30 04:58:02,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-30 04:58:02,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-30 04:58:02,646 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 191 flow [2023-08-30 04:58:02,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 218.0) internal successors, (3052), 14 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:02,648 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-30 04:58:02,660 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 [2023-08-30 04:58:02,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:02,858 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:02,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:02,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1879371511, now seen corresponding path program 2 times [2023-08-30 04:58:02,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:02,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023634734] [2023-08-30 04:58:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:58:02,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:02,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:02,860 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:02,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 04:58:02,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:58:02,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:58:02,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:02,982 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 04:58:02,982 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 04:58:03,096 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:58:03,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:58:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:03,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:03,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023634734] [2023-08-30 04:58:03,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023634734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:03,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:03,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:58:03,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992812397] [2023-08-30 04:58:03,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:03,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:58:03,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:03,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:58:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:58:03,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-08-30 04:58:03,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:03,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-08-30 04:58:03,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:03,510 INFO L130 PetriNetUnfolder]: 341/585 cut-off events. [2023-08-30 04:58:03,511 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 04:58:03,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 585 events. 341/585 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2375 event pairs, 288 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 1219. Up to 585 conditions per place. [2023-08-30 04:58:03,514 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 04:58:03,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 261 flow [2023-08-30 04:58:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:58:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:58:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-08-30 04:58:03,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2023-08-30 04:58:03,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-08-30 04:58:03,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-08-30 04:58:03,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:03,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-08-30 04:58:03,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,523 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 191 flow. Second operand 3 states and 702 transitions. [2023-08-30 04:58:03,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 261 flow [2023-08-30 04:58:03,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 236 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 04:58:03,525 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2023-08-30 04:58:03,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 04:58:03,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 04:58:03,527 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2023-08-30 04:58:03,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:03,528 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-30 04:58:03,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:03,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:03,738 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:03,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1879371510, now seen corresponding path program 1 times [2023-08-30 04:58:03,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:03,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004440124] [2023-08-30 04:58:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:03,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:03,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:03,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:03,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 04:58:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:58:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:03,936 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:58:03,937 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 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 04:58:03,945 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 10 treesize of output 8 [2023-08-30 04:58:04,054 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:58:04,055 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 12 treesize of output 18 [2023-08-30 04:58:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:04,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:04,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004440124] [2023-08-30 04:58:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004440124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:04,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:04,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:58:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221352039] [2023-08-30 04:58:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:04,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:04,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:04,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:04,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-30 04:58:04,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:04,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-30 04:58:04,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:04,680 INFO L130 PetriNetUnfolder]: 229/416 cut-off events. [2023-08-30 04:58:04,680 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 04:58:04,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 416 events. 229/416 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1580 event pairs, 191 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 865. Up to 410 conditions per place. [2023-08-30 04:58:04,683 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 04:58:04,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 220 flow [2023-08-30 04:58:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:58:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:58:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 918 transitions. [2023-08-30 04:58:04,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273743016759777 [2023-08-30 04:58:04,686 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 918 transitions. [2023-08-30 04:58:04,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 918 transitions. [2023-08-30 04:58:04,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:04,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 918 transitions. [2023-08-30 04:58:04,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,692 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,692 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 4 states and 918 transitions. [2023-08-30 04:58:04,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 220 flow [2023-08-30 04:58:04,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:58:04,694 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2023-08-30 04:58:04,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-30 04:58:04,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 04:58:04,695 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2023-08-30 04:58:04,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:04,696 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 04:58:04,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:04,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:04,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:04,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:04,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2105233734, now seen corresponding path program 1 times [2023-08-30 04:58:04,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:04,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385187495] [2023-08-30 04:58:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:04,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:04,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:04,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:04,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 04:58:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:58:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:05,106 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 04:58:05,107 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 04:58:05,140 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:58:05,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:58:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:05,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:05,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385187495] [2023-08-30 04:58:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385187495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:05,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:58:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664042405] [2023-08-30 04:58:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:05,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:58:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:58:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:58:05,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2023-08-30 04:58:05,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:05,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:05,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2023-08-30 04:58:05,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:05,367 INFO L130 PetriNetUnfolder]: 214/386 cut-off events. [2023-08-30 04:58:05,367 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 04:58:05,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 386 events. 214/386 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1438 event pairs, 178 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 806. Up to 386 conditions per place. [2023-08-30 04:58:05,368 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 04:58:05,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 215 flow [2023-08-30 04:58:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:58:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:58:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-30 04:58:05,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954686530105524 [2023-08-30 04:58:05,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-30 04:58:05,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-30 04:58:05,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:05,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-30 04:58:05,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:05,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:05,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:05,375 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 3 states and 692 transitions. [2023-08-30 04:58:05,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 215 flow [2023-08-30 04:58:05,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:58:05,377 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 138 flow [2023-08-30 04:58:05,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-30 04:58:05,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-30 04:58:05,378 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 138 flow [2023-08-30 04:58:05,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:05,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:05,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 04:58:05,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:05,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:05,589 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:05,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2105233735, now seen corresponding path program 1 times [2023-08-30 04:58:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:05,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308765354] [2023-08-30 04:58:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:05,591 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:05,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 04:58:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 04:58:05,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:05,825 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 04:58:05,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 04:58:05,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-08-30 04:58:05,898 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:58:05,899 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 12 treesize of output 18 [2023-08-30 04:58:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:06,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:06,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308765354] [2023-08-30 04:58:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308765354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:06,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:06,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:58:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347189592] [2023-08-30 04:58:06,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:06,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-30 04:58:06,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:06,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:06,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-30 04:58:06,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:06,399 INFO L130 PetriNetUnfolder]: 199/356 cut-off events. [2023-08-30 04:58:06,399 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 04:58:06,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 356 events. 199/356 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1301 event pairs, 165 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 746. Up to 350 conditions per place. [2023-08-30 04:58:06,401 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 34 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-30 04:58:06,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 206 flow [2023-08-30 04:58:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:58:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:58:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 914 transitions. [2023-08-30 04:58:06,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425512104283054 [2023-08-30 04:58:06,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 914 transitions. [2023-08-30 04:58:06,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 914 transitions. [2023-08-30 04:58:06,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:06,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 914 transitions. [2023-08-30 04:58:06,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:06,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:06,410 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:06,410 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 138 flow. Second operand 4 states and 914 transitions. [2023-08-30 04:58:06,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 206 flow [2023-08-30 04:58:06,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:58:06,411 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 137 flow [2023-08-30 04:58:06,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-08-30 04:58:06,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-30 04:58:06,412 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 137 flow [2023-08-30 04:58:06,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:06,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:06,413 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:06,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:06,625 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:06,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 837737791, now seen corresponding path program 1 times [2023-08-30 04:58:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:06,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84776191] [2023-08-30 04:58:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:06,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:06,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 04:58:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:58:06,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:06,861 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:06,861 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:06,894 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:58:06,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 04:58:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:06,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:06,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:06,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84776191] [2023-08-30 04:58:06,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84776191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:06,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:06,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:58:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466786409] [2023-08-30 04:58:06,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:06,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:06,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:06,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:07,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-30 04:58:07,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:07,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:07,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-30 04:58:07,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:07,194 INFO L130 PetriNetUnfolder]: 153/278 cut-off events. [2023-08-30 04:58:07,195 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 04:58:07,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 278 events. 153/278 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 905 event pairs, 123 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 590. Up to 272 conditions per place. [2023-08-30 04:58:07,209 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 32 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-30 04:58:07,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 201 flow [2023-08-30 04:58:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:58:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:58:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 880 transitions. [2023-08-30 04:58:07,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409683426443203 [2023-08-30 04:58:07,212 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 880 transitions. [2023-08-30 04:58:07,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 880 transitions. [2023-08-30 04:58:07,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:07,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 880 transitions. [2023-08-30 04:58:07,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:07,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:07,217 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:07,217 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 137 flow. Second operand 4 states and 880 transitions. [2023-08-30 04:58:07,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 201 flow [2023-08-30 04:58:07,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:58:07,219 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 134 flow [2023-08-30 04:58:07,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-30 04:58:07,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-30 04:58:07,220 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 134 flow [2023-08-30 04:58:07,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:07,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:07,220 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:07,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:07,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:07,432 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:07,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash 837737792, now seen corresponding path program 1 times [2023-08-30 04:58:07,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:07,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481282670] [2023-08-30 04:58:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:07,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:07,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:07,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:07,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 04:58:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:58:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:07,682 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:07,682 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:07,730 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:58:07,730 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:58:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:07,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:58:07,825 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:58:07,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:58:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:07,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:07,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:07,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481282670] [2023-08-30 04:58:07,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481282670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:07,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:07,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:58:07,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820113859] [2023-08-30 04:58:07,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:58:07,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:07,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:58:07,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:58:08,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2023-08-30 04:58:08,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 213.6) internal successors, (1068), 5 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:08,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2023-08-30 04:58:08,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:08,357 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-08-30 04:58:08,357 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 04:58:08,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 474 events. 265/474 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2031 event pairs, 123 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 988. Up to 272 conditions per place. [2023-08-30 04:58:08,359 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 48 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-30 04:58:08,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 277 flow [2023-08-30 04:58:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:58:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:58:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-08-30 04:58:08,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41154562383612664 [2023-08-30 04:58:08,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-08-30 04:58:08,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-08-30 04:58:08,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:08,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-08-30 04:58:08,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,368 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,368 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 134 flow. Second operand 5 states and 1105 transitions. [2023-08-30 04:58:08,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 277 flow [2023-08-30 04:58:08,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:58:08,370 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 147 flow [2023-08-30 04:58:08,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-30 04:58:08,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 04:58:08,371 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 147 flow [2023-08-30 04:58:08,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.6) internal successors, (1068), 5 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:08,371 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:08,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:08,583 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:08,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash 837737829, now seen corresponding path program 1 times [2023-08-30 04:58:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:08,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011886677] [2023-08-30 04:58:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:08,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:08,584 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:08,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 04:58:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:58:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:08,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 04:58:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:08,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:08,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011886677] [2023-08-30 04:58:08,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011886677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:08,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:58:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897631904] [2023-08-30 04:58:08,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:08,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:08,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 537 [2023-08-30 04:58:08,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:08,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 537 [2023-08-30 04:58:08,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:09,085 INFO L130 PetriNetUnfolder]: 191/348 cut-off events. [2023-08-30 04:58:09,085 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-30 04:58:09,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 348 events. 191/348 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1223 event pairs, 155 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 795. Up to 336 conditions per place. [2023-08-30 04:58:09,087 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-30 04:58:09,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 33 transitions, 209 flow [2023-08-30 04:58:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:58:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:58:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 878 transitions. [2023-08-30 04:58:09,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40875232774674114 [2023-08-30 04:58:09,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 878 transitions. [2023-08-30 04:58:09,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 878 transitions. [2023-08-30 04:58:09,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:09,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 878 transitions. [2023-08-30 04:58:09,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,095 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,095 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 147 flow. Second operand 4 states and 878 transitions. [2023-08-30 04:58:09,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 33 transitions, 209 flow [2023-08-30 04:58:09,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 203 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:58:09,096 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 141 flow [2023-08-30 04:58:09,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-08-30 04:58:09,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-30 04:58:09,097 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 141 flow [2023-08-30 04:58:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:09,098 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:09,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:09,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:09,309 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:09,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 837737831, now seen corresponding path program 1 times [2023-08-30 04:58:09,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:09,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367489088] [2023-08-30 04:58:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:09,310 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 [2023-08-30 04:58:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:09,311 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:09,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 04:58:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:58:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:09,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:58:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:09,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:09,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:09,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367489088] [2023-08-30 04:58:09,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367489088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:09,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:09,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:58:09,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456583976] [2023-08-30 04:58:09,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:09,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:58:09,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:09,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:58:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:58:09,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 537 [2023-08-30 04:58:09,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 217.6) internal successors, (1088), 5 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:09,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 537 [2023-08-30 04:58:09,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:09,952 INFO L130 PetriNetUnfolder]: 174/319 cut-off events. [2023-08-30 04:58:09,952 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-30 04:58:09,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 319 events. 174/319 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1163 event pairs, 87 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 724. Up to 198 conditions per place. [2023-08-30 04:58:09,954 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-08-30 04:58:09,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 266 flow [2023-08-30 04:58:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:58:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:58:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1120 transitions. [2023-08-30 04:58:09,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171322160148976 [2023-08-30 04:58:09,957 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1120 transitions. [2023-08-30 04:58:09,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1120 transitions. [2023-08-30 04:58:09,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:09,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1120 transitions. [2023-08-30 04:58:09,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,963 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 141 flow. Second operand 5 states and 1120 transitions. [2023-08-30 04:58:09,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 266 flow [2023-08-30 04:58:09,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:58:09,964 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 150 flow [2023-08-30 04:58:09,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-08-30 04:58:09,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-30 04:58:09,965 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 150 flow [2023-08-30 04:58:09,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.6) internal successors, (1088), 5 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:09,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:09,966 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:09,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-30 04:58:10,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:10,177 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:10,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:10,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1907201400, now seen corresponding path program 1 times [2023-08-30 04:58:10,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:10,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080477109] [2023-08-30 04:58:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:10,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:10,179 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:10,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 04:58:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:58:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:10,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:58:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:10,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:10,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080477109] [2023-08-30 04:58:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080477109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:10,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:10,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 04:58:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174317788] [2023-08-30 04:58:10,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:58:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:58:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:58:12,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-08-30 04:58:12,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 150 flow. Second operand has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:12,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:12,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-08-30 04:58:12,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:12,638 INFO L130 PetriNetUnfolder]: 408/733 cut-off events. [2023-08-30 04:58:12,638 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 04:58:12,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 733 events. 408/733 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3028 event pairs, 87 based on Foata normal form. 36/553 useless extension candidates. Maximal degree in co-relation 1685. Up to 198 conditions per place. [2023-08-30 04:58:12,641 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 88 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2023-08-30 04:58:12,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 95 transitions, 488 flow [2023-08-30 04:58:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:58:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:58:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1810 transitions. [2023-08-30 04:58:12,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213221601489758 [2023-08-30 04:58:12,644 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1810 transitions. [2023-08-30 04:58:12,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1810 transitions. [2023-08-30 04:58:12,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:12,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1810 transitions. [2023-08-30 04:58:12,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 226.25) internal successors, (1810), 8 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:12,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:12,652 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:12,652 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 150 flow. Second operand 8 states and 1810 transitions. [2023-08-30 04:58:12,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 95 transitions, 488 flow [2023-08-30 04:58:12,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 480 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:58:12,655 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 182 flow [2023-08-30 04:58:12,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2023-08-30 04:58:12,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-30 04:58:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 182 flow [2023-08-30 04:58:12,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:12,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:12,656 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:12,669 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 [2023-08-30 04:58:12,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:12,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:12,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1906378013, now seen corresponding path program 1 times [2023-08-30 04:58:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:12,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440842517] [2023-08-30 04:58:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:12,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:12,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:12,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:12,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 04:58:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:58:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:13,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:58:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:13,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:13,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:13,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440842517] [2023-08-30 04:58:13,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440842517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:13,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:13,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:58:13,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188286086] [2023-08-30 04:58:13,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:13,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:58:13,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:58:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:58:13,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 537 [2023-08-30 04:58:13,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:13,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 537 [2023-08-30 04:58:13,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:13,565 INFO L130 PetriNetUnfolder]: 627/1118 cut-off events. [2023-08-30 04:58:13,565 INFO L131 PetriNetUnfolder]: For 583/583 co-relation queries the response was YES. [2023-08-30 04:58:13,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 1118 events. 627/1118 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5527 event pairs, 344 based on Foata normal form. 0/768 useless extension candidates. Maximal degree in co-relation 2719. Up to 721 conditions per place. [2023-08-30 04:58:13,570 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-30 04:58:13,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 370 flow [2023-08-30 04:58:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:58:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:58:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1119 transitions. [2023-08-30 04:58:13,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41675977653631285 [2023-08-30 04:58:13,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1119 transitions. [2023-08-30 04:58:13,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1119 transitions. [2023-08-30 04:58:13,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:13,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1119 transitions. [2023-08-30 04:58:13,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,578 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,578 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 182 flow. Second operand 5 states and 1119 transitions. [2023-08-30 04:58:13,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 370 flow [2023-08-30 04:58:13,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:58:13,580 INFO L231 Difference]: Finished difference. Result has 56 places, 37 transitions, 193 flow [2023-08-30 04:58:13,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=56, PETRI_TRANSITIONS=37} [2023-08-30 04:58:13,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-08-30 04:58:13,581 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 37 transitions, 193 flow [2023-08-30 04:58:13,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:13,582 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:13,595 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 [2023-08-30 04:58:13,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:13,793 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:13,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:13,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1906378143, now seen corresponding path program 1 times [2023-08-30 04:58:13,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:13,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250208858] [2023-08-30 04:58:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:13,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:13,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:13,795 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:13,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 04:58:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:14,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:58:14,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:14,055 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:14,055 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:14,100 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:58:14,100 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:58:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:14,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:58:14,172 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:58:14,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:58:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:14,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:14,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:14,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250208858] [2023-08-30 04:58:14,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250208858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:14,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:14,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:58:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841110778] [2023-08-30 04:58:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:58:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:58:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:58:14,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2023-08-30 04:58:14,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 37 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:14,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:14,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2023-08-30 04:58:14,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:14,747 INFO L130 PetriNetUnfolder]: 554/993 cut-off events. [2023-08-30 04:58:14,747 INFO L131 PetriNetUnfolder]: For 645/645 co-relation queries the response was YES. [2023-08-30 04:58:14,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2687 conditions, 993 events. 554/993 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4743 event pairs, 344 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 2666. Up to 727 conditions per place. [2023-08-30 04:58:14,752 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 49 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-30 04:58:14,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 53 transitions, 373 flow [2023-08-30 04:58:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:58:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:58:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1098 transitions. [2023-08-30 04:58:14,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40893854748603353 [2023-08-30 04:58:14,757 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1098 transitions. [2023-08-30 04:58:14,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1098 transitions. [2023-08-30 04:58:14,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:14,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1098 transitions. [2023-08-30 04:58:14,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:14,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:14,763 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:14,763 INFO L175 Difference]: Start difference. First operand has 56 places, 37 transitions, 193 flow. Second operand 5 states and 1098 transitions. [2023-08-30 04:58:14,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 53 transitions, 373 flow [2023-08-30 04:58:14,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 367 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:58:14,766 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 199 flow [2023-08-30 04:58:14,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-08-30 04:58:14,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2023-08-30 04:58:14,767 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 199 flow [2023-08-30 04:58:14,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:14,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:14,767 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:14,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:14,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:14,968 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:14,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1907201361, now seen corresponding path program 1 times [2023-08-30 04:58:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:14,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695210890] [2023-08-30 04:58:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:14,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:14,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:14,969 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:14,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 04:58:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:15,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:58:15,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:15,313 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:58:15,313 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:58:15,354 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:15,354 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:15,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:15,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:58:15,415 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:58:15,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:58:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:15,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:15,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695210890] [2023-08-30 04:58:15,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695210890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:15,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:15,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:58:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542592757] [2023-08-30 04:58:15,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:15,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:58:15,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:58:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:58:18,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:58:21,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:58:23,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:58:25,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 537 [2023-08-30 04:58:25,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 199 flow. Second operand has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:25,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:25,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 537 [2023-08-30 04:58:25,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:26,608 INFO L130 PetriNetUnfolder]: 485/876 cut-off events. [2023-08-30 04:58:26,608 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-30 04:58:26,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 876 events. 485/876 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3849 event pairs, 81 based on Foata normal form. 48/798 useless extension candidates. Maximal degree in co-relation 2489. Up to 227 conditions per place. [2023-08-30 04:58:26,612 INFO L137 encePairwiseOnDemand]: 530/537 looper letters, 87 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2023-08-30 04:58:26,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 97 transitions, 589 flow [2023-08-30 04:58:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:58:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:58:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1750 transitions. [2023-08-30 04:58:26,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073556797020484 [2023-08-30 04:58:26,615 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1750 transitions. [2023-08-30 04:58:26,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1750 transitions. [2023-08-30 04:58:26,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:26,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1750 transitions. [2023-08-30 04:58:26,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 218.75) internal successors, (1750), 8 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:26,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:26,622 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:26,622 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 199 flow. Second operand 8 states and 1750 transitions. [2023-08-30 04:58:26,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 97 transitions, 589 flow [2023-08-30 04:58:26,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 559 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 04:58:26,626 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 230 flow [2023-08-30 04:58:26,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2023-08-30 04:58:26,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2023-08-30 04:58:26,627 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 230 flow [2023-08-30 04:58:26,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:26,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:26,628 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:26,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:26,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:26,840 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:26,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:26,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1031814743, now seen corresponding path program 1 times [2023-08-30 04:58:26,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:26,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505198984] [2023-08-30 04:58:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:26,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:26,843 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:26,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 04:58:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:27,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:58:27,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:27,162 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:27,162 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:27,196 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:58:27,197 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:58:27,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:27,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:58:27,254 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:58:27,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:58:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:27,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:29,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:29,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505198984] [2023-08-30 04:58:29,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505198984] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:29,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:29,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:58:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576124160] [2023-08-30 04:58:29,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:29,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:58:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:58:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:58:32,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:58:33,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 537 [2023-08-30 04:58:33,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 230 flow. Second operand has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:33,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:33,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 537 [2023-08-30 04:58:33,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:34,130 INFO L130 PetriNetUnfolder]: 1061/1896 cut-off events. [2023-08-30 04:58:34,130 INFO L131 PetriNetUnfolder]: For 2942/2942 co-relation queries the response was YES. [2023-08-30 04:58:34,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 1896 events. 1061/1896 cut-off events. For 2942/2942 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10293 event pairs, 299 based on Foata normal form. 138/1850 useless extension candidates. Maximal degree in co-relation 5719. Up to 640 conditions per place. [2023-08-30 04:58:34,139 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 105 selfloop transitions, 7 changer transitions 0/112 dead transitions. [2023-08-30 04:58:34,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 910 flow [2023-08-30 04:58:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:58:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:58:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1762 transitions. [2023-08-30 04:58:34,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101489757914339 [2023-08-30 04:58:34,144 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1762 transitions. [2023-08-30 04:58:34,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1762 transitions. [2023-08-30 04:58:34,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:34,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1762 transitions. [2023-08-30 04:58:34,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 220.25) internal successors, (1762), 8 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:34,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:34,151 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:34,151 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 230 flow. Second operand 8 states and 1762 transitions. [2023-08-30 04:58:34,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 910 flow [2023-08-30 04:58:34,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 787 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-30 04:58:34,157 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 243 flow [2023-08-30 04:58:34,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-30 04:58:34,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2023-08-30 04:58:34,158 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 243 flow [2023-08-30 04:58:34,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:34,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:34,158 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:34,173 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 (21)] Ended with exit code 0 [2023-08-30 04:58:34,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:34,371 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:34,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1031814873, now seen corresponding path program 1 times [2023-08-30 04:58:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:34,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037001757] [2023-08-30 04:58:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:34,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:34,373 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:34,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 04:58:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:34,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:58:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:34,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:58:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:34,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:34,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037001757] [2023-08-30 04:58:34,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037001757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:34,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:34,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 04:58:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241339596] [2023-08-30 04:58:34,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:34,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:58:34,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:58:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:58:36,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-08-30 04:58:36,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 243 flow. Second operand has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:36,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:36,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-08-30 04:58:36,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:37,003 INFO L130 PetriNetUnfolder]: 869/1566 cut-off events. [2023-08-30 04:58:37,003 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2023-08-30 04:58:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 1566 events. 869/1566 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8113 event pairs, 237 based on Foata normal form. 138/1676 useless extension candidates. Maximal degree in co-relation 4904. Up to 524 conditions per place. [2023-08-30 04:58:37,011 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2023-08-30 04:58:37,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 109 transitions, 797 flow [2023-08-30 04:58:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:58:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:58:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1799 transitions. [2023-08-30 04:58:37,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41876163873370575 [2023-08-30 04:58:37,015 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1799 transitions. [2023-08-30 04:58:37,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1799 transitions. [2023-08-30 04:58:37,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:37,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1799 transitions. [2023-08-30 04:58:37,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 224.875) internal successors, (1799), 8 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:37,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:37,022 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:37,022 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 243 flow. Second operand 8 states and 1799 transitions. [2023-08-30 04:58:37,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 109 transitions, 797 flow [2023-08-30 04:58:37,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 786 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 04:58:37,027 INFO L231 Difference]: Finished difference. Result has 73 places, 41 transitions, 261 flow [2023-08-30 04:58:37,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=73, PETRI_TRANSITIONS=41} [2023-08-30 04:58:37,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2023-08-30 04:58:37,028 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 41 transitions, 261 flow [2023-08-30 04:58:37,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:37,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:37,029 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:37,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:37,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:37,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:37,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 292861853, now seen corresponding path program 2 times [2023-08-30 04:58:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:37,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342975902] [2023-08-30 04:58:37,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:58:37,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:37,243 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:37,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 04:58:37,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:58:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 04:58:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:37,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:58:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:37,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:38,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342975902] [2023-08-30 04:58:38,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342975902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:38,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:38,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 04:58:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761951201] [2023-08-30 04:58:38,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:58:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:58:38,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:58:42,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2023-08-30 04:58:42,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 41 transitions, 261 flow. Second operand has 16 states, 16 states have (on average 216.625) internal successors, (3466), 16 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:42,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:42,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2023-08-30 04:58:42,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:43,488 INFO L130 PetriNetUnfolder]: 1061/1906 cut-off events. [2023-08-30 04:58:43,488 INFO L131 PetriNetUnfolder]: For 3696/3696 co-relation queries the response was YES. [2023-08-30 04:58:43,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1906 events. 1061/1906 cut-off events. For 3696/3696 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10225 event pairs, 237 based on Foata normal form. 46/1918 useless extension candidates. Maximal degree in co-relation 6437. Up to 524 conditions per place. [2023-08-30 04:58:43,511 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 133 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2023-08-30 04:58:43,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 1061 flow [2023-08-30 04:58:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:58:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:58:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2250 transitions. [2023-08-30 04:58:43,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41899441340782123 [2023-08-30 04:58:43,516 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2250 transitions. [2023-08-30 04:58:43,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2250 transitions. [2023-08-30 04:58:43,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:43,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2250 transitions. [2023-08-30 04:58:43,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 225.0) internal successors, (2250), 10 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:43,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:43,523 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:43,524 INFO L175 Difference]: Start difference. First operand has 73 places, 41 transitions, 261 flow. Second operand 10 states and 2250 transitions. [2023-08-30 04:58:43,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 1061 flow [2023-08-30 04:58:43,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 142 transitions, 1024 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-30 04:58:43,530 INFO L231 Difference]: Finished difference. Result has 74 places, 43 transitions, 273 flow [2023-08-30 04:58:43,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=273, PETRI_PLACES=74, PETRI_TRANSITIONS=43} [2023-08-30 04:58:43,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2023-08-30 04:58:43,531 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 43 transitions, 273 flow [2023-08-30 04:58:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 216.625) internal successors, (3466), 16 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:43,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:43,532 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:43,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:43,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:43,745 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:43,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash 292861983, now seen corresponding path program 2 times [2023-08-30 04:58:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:43,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916013858] [2023-08-30 04:58:43,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:58:43,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:43,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:43,747 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:43,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 04:58:43,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:58:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 04:58:43,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:43,926 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:43,926 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:43,970 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:58:43,970 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:58:44,031 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 04:58:44,031 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 12 treesize of output 14 [2023-08-30 04:58:44,043 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:58:44,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:58:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 04:58:44,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:44,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:44,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916013858] [2023-08-30 04:58:44,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916013858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:44,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:44,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:58:44,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505093214] [2023-08-30 04:58:44,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:44,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:58:44,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:44,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:58:44,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:58:44,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 537 [2023-08-30 04:58:44,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 43 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 213.2) internal successors, (1066), 5 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:44,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:44,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 537 [2023-08-30 04:58:44,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:44,790 INFO L130 PetriNetUnfolder]: 889/1612 cut-off events. [2023-08-30 04:58:44,790 INFO L131 PetriNetUnfolder]: For 2438/2438 co-relation queries the response was YES. [2023-08-30 04:58:44,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 1612 events. 889/1612 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8239 event pairs, 815 based on Foata normal form. 88/1700 useless extension candidates. Maximal degree in co-relation 5257. Up to 1600 conditions per place. [2023-08-30 04:58:44,798 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 37 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-30 04:58:44,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 40 transitions, 334 flow [2023-08-30 04:58:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:58:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:58:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1079 transitions. [2023-08-30 04:58:44,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40186219739292367 [2023-08-30 04:58:44,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1079 transitions. [2023-08-30 04:58:44,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1079 transitions. [2023-08-30 04:58:44,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:44,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1079 transitions. [2023-08-30 04:58:44,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.8) internal successors, (1079), 5 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:44,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:44,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:44,806 INFO L175 Difference]: Start difference. First operand has 74 places, 43 transitions, 273 flow. Second operand 5 states and 1079 transitions. [2023-08-30 04:58:44,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 40 transitions, 334 flow [2023-08-30 04:58:44,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 40 transitions, 310 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-08-30 04:58:44,811 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 236 flow [2023-08-30 04:58:44,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2023-08-30 04:58:44,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2023-08-30 04:58:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 236 flow [2023-08-30 04:58:44,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.2) internal successors, (1066), 5 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:44,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:44,812 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:44,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:45,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:45,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:45,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash 488791719, now seen corresponding path program 3 times [2023-08-30 04:58:45,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:45,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556982643] [2023-08-30 04:58:45,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:58:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:45,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:45,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 04:58:45,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 04:58:45,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:58:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:45,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:45,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:45,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556982643] [2023-08-30 04:58:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556982643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:45,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:45,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 04:58:45,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209045225] [2023-08-30 04:58:45,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:45,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 04:58:45,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 04:58:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 04:58:45,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 537 [2023-08-30 04:58:45,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 236 flow. Second operand has 14 states, 14 states have (on average 227.57142857142858) internal successors, (3186), 14 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:45,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:45,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 537 [2023-08-30 04:58:45,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:46,564 INFO L130 PetriNetUnfolder]: 784/1463 cut-off events. [2023-08-30 04:58:46,564 INFO L131 PetriNetUnfolder]: For 1620/1620 co-relation queries the response was YES. [2023-08-30 04:58:46,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 1463 events. 784/1463 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7616 event pairs, 48 based on Foata normal form. 88/1551 useless extension candidates. Maximal degree in co-relation 4161. Up to 264 conditions per place. [2023-08-30 04:58:46,570 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 125 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2023-08-30 04:58:46,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 939 flow [2023-08-30 04:58:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:58:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:58:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1898 transitions. [2023-08-30 04:58:46,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44180633147113596 [2023-08-30 04:58:46,580 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1898 transitions. [2023-08-30 04:58:46,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1898 transitions. [2023-08-30 04:58:46,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:46,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1898 transitions. [2023-08-30 04:58:46,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 237.25) internal successors, (1898), 8 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:46,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:46,588 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:46,588 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 236 flow. Second operand 8 states and 1898 transitions. [2023-08-30 04:58:46,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 939 flow [2023-08-30 04:58:46,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 131 transitions, 921 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 04:58:46,593 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 210 flow [2023-08-30 04:58:46,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2023-08-30 04:58:46,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2023-08-30 04:58:46,594 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 210 flow [2023-08-30 04:58:46,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 227.57142857142858) internal successors, (3186), 14 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:46,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:46,595 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:46,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:46,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:46,813 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:46,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:46,813 INFO L85 PathProgramCache]: Analyzing trace with hash 105872388, now seen corresponding path program 2 times [2023-08-30 04:58:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:46,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96946208] [2023-08-30 04:58:46,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:58:46,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:46,815 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:46,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 04:58:47,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:58:47,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:47,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:58:47,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:47,106 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:58:47,106 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:58:47,140 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:58:47,140 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:58:47,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:47,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:58:47,197 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:58:47,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:58:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:47,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:48,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:48,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96946208] [2023-08-30 04:58:48,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96946208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:48,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:48,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 04:58:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296454149] [2023-08-30 04:58:48,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:48,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:58:48,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:48,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:58:48,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:58:50,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:58:54,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 537 [2023-08-30 04:58:54,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 210 flow. Second operand has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:54,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:54,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 537 [2023-08-30 04:58:54,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:56,092 INFO L130 PetriNetUnfolder]: 1591/2974 cut-off events. [2023-08-30 04:58:56,092 INFO L131 PetriNetUnfolder]: For 2526/2526 co-relation queries the response was YES. [2023-08-30 04:58:56,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8479 conditions, 2974 events. 1591/2974 cut-off events. For 2526/2526 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 16173 event pairs, 153 based on Foata normal form. 168/3142 useless extension candidates. Maximal degree in co-relation 8460. Up to 540 conditions per place. [2023-08-30 04:58:56,102 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 188 selfloop transitions, 14 changer transitions 0/202 dead transitions. [2023-08-30 04:58:56,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 202 transitions, 1252 flow [2023-08-30 04:58:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 04:58:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 04:58:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3096 transitions. [2023-08-30 04:58:56,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118116520351157 [2023-08-30 04:58:56,107 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3096 transitions. [2023-08-30 04:58:56,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3096 transitions. [2023-08-30 04:58:56,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:56,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3096 transitions. [2023-08-30 04:58:56,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 221.14285714285714) internal successors, (3096), 14 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:56,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:56,116 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:56,116 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 210 flow. Second operand 14 states and 3096 transitions. [2023-08-30 04:58:56,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 202 transitions, 1252 flow [2023-08-30 04:58:56,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 202 transitions, 1131 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 04:58:56,122 INFO L231 Difference]: Finished difference. Result has 77 places, 44 transitions, 304 flow [2023-08-30 04:58:56,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=304, PETRI_PLACES=77, PETRI_TRANSITIONS=44} [2023-08-30 04:58:56,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2023-08-30 04:58:56,123 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 44 transitions, 304 flow [2023-08-30 04:58:56,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:56,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:56,123 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:56,137 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 (26)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:56,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:56,338 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:56,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1672271916, now seen corresponding path program 1 times [2023-08-30 04:58:56,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:56,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925424605] [2023-08-30 04:58:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:56,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:56,339 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:56,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 04:58:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:58:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:56,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:56,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925424605] [2023-08-30 04:58:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925424605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:56,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:56,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:58:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87211908] [2023-08-30 04:58:56,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:56,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:56,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:56,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:56,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2023-08-30 04:58:56,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 44 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:56,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:56,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2023-08-30 04:58:56,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:57,070 INFO L130 PetriNetUnfolder]: 1589/2972 cut-off events. [2023-08-30 04:58:57,070 INFO L131 PetriNetUnfolder]: For 3270/3270 co-relation queries the response was YES. [2023-08-30 04:58:57,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8922 conditions, 2972 events. 1589/2972 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 16656 event pairs, 1319 based on Foata normal form. 2/2974 useless extension candidates. Maximal degree in co-relation 8895. Up to 2525 conditions per place. [2023-08-30 04:58:57,081 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 81 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-30 04:58:57,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 811 flow [2023-08-30 04:58:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:58:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:58:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 937 transitions. [2023-08-30 04:58:57,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436219739292365 [2023-08-30 04:58:57,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 937 transitions. [2023-08-30 04:58:57,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 937 transitions. [2023-08-30 04:58:57,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:57,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 937 transitions. [2023-08-30 04:58:57,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:57,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:57,086 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:57,086 INFO L175 Difference]: Start difference. First operand has 77 places, 44 transitions, 304 flow. Second operand 4 states and 937 transitions. [2023-08-30 04:58:57,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 811 flow [2023-08-30 04:58:57,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 743 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-30 04:58:57,093 INFO L231 Difference]: Finished difference. Result has 75 places, 45 transitions, 294 flow [2023-08-30 04:58:57,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=45} [2023-08-30 04:58:57,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2023-08-30 04:58:57,094 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 45 transitions, 294 flow [2023-08-30 04:58:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:57,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:57,095 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:57,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:57,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:57,306 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:57,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1610188816, now seen corresponding path program 2 times [2023-08-30 04:58:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:57,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272197341] [2023-08-30 04:58:57,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:58:57,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:57,308 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:57,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 04:58:57,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:58:57,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:58:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:57,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:57,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272197341] [2023-08-30 04:58:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272197341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:57,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:57,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:58:57,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995598591] [2023-08-30 04:58:57,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:57,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:57,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:57,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2023-08-30 04:58:57,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 45 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:57,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:57,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2023-08-30 04:58:57,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:58,036 INFO L130 PetriNetUnfolder]: 1585/2968 cut-off events. [2023-08-30 04:58:58,036 INFO L131 PetriNetUnfolder]: For 3007/3007 co-relation queries the response was YES. [2023-08-30 04:58:58,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9526 conditions, 2968 events. 1585/2968 cut-off events. For 3007/3007 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16332 event pairs, 1422 based on Foata normal form. 4/2972 useless extension candidates. Maximal degree in co-relation 9498. Up to 2712 conditions per place. [2023-08-30 04:58:58,046 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 67 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2023-08-30 04:58:58,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 540 flow [2023-08-30 04:58:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:58:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:58:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 936 transitions. [2023-08-30 04:58:58,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2023-08-30 04:58:58,051 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 936 transitions. [2023-08-30 04:58:58,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 936 transitions. [2023-08-30 04:58:58,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:58,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 936 transitions. [2023-08-30 04:58:58,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:58,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:58,054 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:58,054 INFO L175 Difference]: Start difference. First operand has 75 places, 45 transitions, 294 flow. Second operand 4 states and 936 transitions. [2023-08-30 04:58:58,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 540 flow [2023-08-30 04:58:58,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 04:58:58,060 INFO L231 Difference]: Finished difference. Result has 78 places, 46 transitions, 304 flow [2023-08-30 04:58:58,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=78, PETRI_TRANSITIONS=46} [2023-08-30 04:58:58,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2023-08-30 04:58:58,061 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 46 transitions, 304 flow [2023-08-30 04:58:58,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:58,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:58,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:58,068 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:58,262 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:58,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1666920102, now seen corresponding path program 3 times [2023-08-30 04:58:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596251694] [2023-08-30 04:58:58,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:58:58,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:58,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:58,263 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:58,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 04:58:58,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 04:58:58,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:58,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:58:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:58,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:58,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:58,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596251694] [2023-08-30 04:58:58,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596251694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:58,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:58,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:58:58,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487029175] [2023-08-30 04:58:58,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:58,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:58,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-08-30 04:58:58,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 46 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:58,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:58,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-08-30 04:58:58,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:59,064 INFO L130 PetriNetUnfolder]: 1706/3177 cut-off events. [2023-08-30 04:58:59,065 INFO L131 PetriNetUnfolder]: For 3934/3934 co-relation queries the response was YES. [2023-08-30 04:58:59,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10440 conditions, 3177 events. 1706/3177 cut-off events. For 3934/3934 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 17774 event pairs, 1319 based on Foata normal form. 88/3265 useless extension candidates. Maximal degree in co-relation 10410. Up to 2613 conditions per place. [2023-08-30 04:58:59,077 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 84 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-08-30 04:58:59,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 805 flow [2023-08-30 04:58:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:58:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:58:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 930 transitions. [2023-08-30 04:58:59,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329608938547486 [2023-08-30 04:58:59,080 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 930 transitions. [2023-08-30 04:58:59,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 930 transitions. [2023-08-30 04:58:59,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:59,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 930 transitions. [2023-08-30 04:58:59,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:59,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:59,082 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:59,082 INFO L175 Difference]: Start difference. First operand has 78 places, 46 transitions, 304 flow. Second operand 4 states and 930 transitions. [2023-08-30 04:58:59,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 805 flow [2023-08-30 04:58:59,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 795 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:58:59,090 INFO L231 Difference]: Finished difference. Result has 81 places, 48 transitions, 331 flow [2023-08-30 04:58:59,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=81, PETRI_TRANSITIONS=48} [2023-08-30 04:58:59,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2023-08-30 04:58:59,090 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 48 transitions, 331 flow [2023-08-30 04:58:59,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:59,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:59,091 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:59,100 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:59,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:59,300 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:58:59,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1484187432, now seen corresponding path program 4 times [2023-08-30 04:58:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:59,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670979794] [2023-08-30 04:58:59,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:58:59,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:59,302 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:59,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 04:58:59,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:58:59,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:59,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:58:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:59,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:59,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:59,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670979794] [2023-08-30 04:58:59,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670979794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:59,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:59,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:58:59,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326833317] [2023-08-30 04:58:59,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:59,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:59,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:59,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2023-08-30 04:58:59,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 48 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:59,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:59,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2023-08-30 04:58:59,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:00,060 INFO L130 PetriNetUnfolder]: 1585/2946 cut-off events. [2023-08-30 04:59:00,060 INFO L131 PetriNetUnfolder]: For 3804/3804 co-relation queries the response was YES. [2023-08-30 04:59:00,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10054 conditions, 2946 events. 1585/2946 cut-off events. For 3804/3804 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 16448 event pairs, 12 based on Foata normal form. 88/3034 useless extension candidates. Maximal degree in co-relation 10022. Up to 2700 conditions per place. [2023-08-30 04:59:00,072 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 70 selfloop transitions, 6 changer transitions 1/77 dead transitions. [2023-08-30 04:59:00,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 677 flow [2023-08-30 04:59:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:59:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:59:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-30 04:59:00,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43202979515828677 [2023-08-30 04:59:00,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-30 04:59:00,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-30 04:59:00,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:00,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-30 04:59:00,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:00,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:00,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:00,078 INFO L175 Difference]: Start difference. First operand has 81 places, 48 transitions, 331 flow. Second operand 4 states and 928 transitions. [2023-08-30 04:59:00,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 677 flow [2023-08-30 04:59:00,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 670 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:59:00,087 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 355 flow [2023-08-30 04:59:00,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2023-08-30 04:59:00,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2023-08-30 04:59:00,089 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 355 flow [2023-08-30 04:59:00,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:00,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:00,089 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:00,103 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 (30)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:00,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:00,301 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:59:00,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash -615401300, now seen corresponding path program 1 times [2023-08-30 04:59:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:00,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22012435] [2023-08-30 04:59:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:00,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:00,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:00,303 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:00,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 04:59:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:59:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 04:59:00,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:00,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22012435] [2023-08-30 04:59:00,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22012435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:00,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:59:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833937336] [2023-08-30 04:59:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:00,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:59:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:59:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:59:00,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2023-08-30 04:59:00,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:00,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:00,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2023-08-30 04:59:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:01,223 INFO L130 PetriNetUnfolder]: 1635/3030 cut-off events. [2023-08-30 04:59:01,224 INFO L131 PetriNetUnfolder]: For 6953/6953 co-relation queries the response was YES. [2023-08-30 04:59:01,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 3030 events. 1635/3030 cut-off events. For 6953/6953 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 16892 event pairs, 159 based on Foata normal form. 22/3052 useless extension candidates. Maximal degree in co-relation 10462. Up to 2662 conditions per place. [2023-08-30 04:59:01,235 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 70 selfloop transitions, 7 changer transitions 1/78 dead transitions. [2023-08-30 04:59:01,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 713 flow [2023-08-30 04:59:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:59:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:59:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 927 transitions. [2023-08-30 04:59:01,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43156424581005587 [2023-08-30 04:59:01,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 927 transitions. [2023-08-30 04:59:01,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 927 transitions. [2023-08-30 04:59:01,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:01,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 927 transitions. [2023-08-30 04:59:01,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:01,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:01,240 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:01,240 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 355 flow. Second operand 4 states and 927 transitions. [2023-08-30 04:59:01,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 713 flow [2023-08-30 04:59:01,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 697 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 04:59:01,246 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 392 flow [2023-08-30 04:59:01,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2023-08-30 04:59:01,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2023-08-30 04:59:01,246 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 392 flow [2023-08-30 04:59:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:01,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:01,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:01,256 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:01,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:01,448 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:59:01,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1225860184, now seen corresponding path program 2 times [2023-08-30 04:59:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:01,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780171286] [2023-08-30 04:59:01,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:59:01,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:01,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:01,450 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:01,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 04:59:01,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:59:01,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:59:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:01,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:01,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780171286] [2023-08-30 04:59:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780171286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:01,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:01,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:59:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420235098] [2023-08-30 04:59:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:59:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:59:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:59:01,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2023-08-30 04:59:01,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:01,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:01,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2023-08-30 04:59:01,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:02,338 INFO L130 PetriNetUnfolder]: 1584/2925 cut-off events. [2023-08-30 04:59:02,338 INFO L131 PetriNetUnfolder]: For 5855/5855 co-relation queries the response was YES. [2023-08-30 04:59:02,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 2925 events. 1584/2925 cut-off events. For 5855/5855 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 15741 event pairs, 1163 based on Foata normal form. 22/2947 useless extension candidates. Maximal degree in co-relation 10193. Up to 2709 conditions per place. [2023-08-30 04:59:02,349 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 66 selfloop transitions, 7 changer transitions 3/76 dead transitions. [2023-08-30 04:59:02,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 653 flow [2023-08-30 04:59:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:59:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:59:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-30 04:59:02,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43202979515828677 [2023-08-30 04:59:02,351 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-30 04:59:02,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-30 04:59:02,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:02,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-30 04:59:02,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:02,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:02,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:02,353 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 392 flow. Second operand 4 states and 928 transitions. [2023-08-30 04:59:02,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 653 flow [2023-08-30 04:59:02,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 76 transitions, 643 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:59:02,363 INFO L231 Difference]: Finished difference. Result has 88 places, 52 transitions, 416 flow [2023-08-30 04:59:02,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=88, PETRI_TRANSITIONS=52} [2023-08-30 04:59:02,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-08-30 04:59:02,363 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 52 transitions, 416 flow [2023-08-30 04:59:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:02,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:02,364 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:02,380 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 (32)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:02,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:02,576 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 04:59:02,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1813639431, now seen corresponding path program 1 times [2023-08-30 04:59:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:02,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305058880] [2023-08-30 04:59:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:02,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:02,578 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:02,579 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 (33)] Waiting until timeout for monitored process [2023-08-30 04:59:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:02,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 04:59:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:03,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 04:59:03,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 557 treesize of output 317 [2023-08-30 04:59:24,615 WARN L222 SmtUtils]: Spent 18.04s on a formula simplification. DAG size of input: 97 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 04:59:43,496 WARN L222 SmtUtils]: Spent 17.74s on a formula simplification. DAG size of input: 80 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 04:59:52,744 WARN L222 SmtUtils]: Spent 8.41s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 04:59:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:53,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:40,668 WARN L222 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 362 DAG size of output: 234 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 05:00:40,670 INFO L321 Elim1Store]: treesize reduction 420, result has 66.7 percent of original size [2023-08-30 05:00:40,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 500 treesize of output 963 Killed by 15