./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.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/popl20-bad-commit-2.wvr-bad.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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --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 06:04:51,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:04:51,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:04:51,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:04:51,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:04:51,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:04:51,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:04:51,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:04:51,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:04:51,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:04:51,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:04:51,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:04:51,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:04:51,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:04:51,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:04:51,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:04:51,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:04:51,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:04:51,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:04:51,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:04:51,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:04:51,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:04:51,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:04:51,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:04:51,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:04:51,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:04:51,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:04:51,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:04:51,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:04:51,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:04:51,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:04:51,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:04:51,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:04:51,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:04:51,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:04:51,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:04:51,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:04:51,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:04:51,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:04:51,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:04:51,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:04:51,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:04:51,116 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:04:51,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:04:51,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:04:51,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:04:51,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:04:51,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:04:51,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:04:51,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:04:51,119 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:04:51,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:04:51,120 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:04:51,121 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:04:51,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:04:51,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:04:51,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:04:51,121 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:04:51,122 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:04:51,122 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:04:51,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:04:51,122 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:04:51,122 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:04:51,122 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:04:51,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:04:51,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:04:51,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:04:51,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:04:51,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:04:51,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:04:51,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:04:51,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:04:51,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:04:51,124 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:04:51,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:04:51,125 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:04:51,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:04:51,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:04:51,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:04:51,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:04:51,385 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:04:51,386 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:04:51,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-30 06:04:52,292 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:04:52,509 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:04:52,510 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-30 06:04:52,517 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4be01a77/b2c332cb872541ebaf5157f124084edb/FLAGe47bc239e [2023-08-30 06:04:52,854 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4be01a77/b2c332cb872541ebaf5157f124084edb [2023-08-30 06:04:52,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:04:52,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:04:52,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:04:52,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:04:52,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:04:52,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:04:52" (1/1) ... [2023-08-30 06:04:52,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd8cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:52, skipping insertion in model container [2023-08-30 06:04:52,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:04:52" (1/1) ... [2023-08-30 06:04:52,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:04:52,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:04:53,059 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-30 06:04:53,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:04:53,080 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 06:04:53,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f5e8018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:53, skipping insertion in model container [2023-08-30 06:04:53,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:04:53,082 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:04:53,084 INFO L158 Benchmark]: Toolchain (without parser) took 226.00ms. Allocated memory is still 86.0MB. Free memory was 62.6MB in the beginning and 51.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:04:53,084 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 62.9MB. Free memory is still 40.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:04:53,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.42ms. Allocated memory is still 86.0MB. Free memory was 62.3MB in the beginning and 51.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:04:53,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 62.9MB. Free memory is still 40.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.42ms. Allocated memory is still 86.0MB. Free memory was 62.3MB in the beginning and 51.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 215]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --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 06:04:54,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:04:54,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:04:54,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:04:54,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:04:54,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:04:54,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:04:54,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:04:54,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:04:54,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:04:54,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:04:54,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:04:54,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:04:54,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:04:54,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:04:54,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:04:54,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:04:54,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:04:54,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:04:54,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:04:54,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:04:54,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:04:54,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:04:54,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:04:54,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:04:54,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:04:54,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:04:54,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:04:54,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:04:54,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:04:54,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:04:54,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:04:54,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:04:54,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:04:54,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:04:54,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:04:54,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:04:54,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:04:54,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:04:54,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:04:54,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:04:54,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:04:54,876 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:04:54,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:04:54,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:04:54,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:04:54,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:04:54,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:04:54,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:04:54,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:04:54,883 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:04:54,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:04:54,884 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:04:54,884 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:04:54,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:04:54,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:04:54,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:04:54,885 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:04:54,885 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:04:54,885 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:04:54,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:04:54,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:04:54,886 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:04:54,886 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:04:54,886 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:04:54,886 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:04:54,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:04:54,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:04:54,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:04:54,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:04:54,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:04:54,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:04:54,888 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:04:54,888 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:04:54,888 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:04:54,889 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:04:54,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:04:54,889 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:04:54,889 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:04:54,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:04:55,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:04:55,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:04:55,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:04:55,191 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:04:55,191 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:04:55,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-30 06:04:56,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:04:56,630 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:04:56,630 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-30 06:04:56,653 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3779b8ab0/e876dad7bd2e4dbc92cce7323367f89e/FLAG91cb8a27e [2023-08-30 06:04:56,666 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3779b8ab0/e876dad7bd2e4dbc92cce7323367f89e [2023-08-30 06:04:56,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:04:56,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:04:56,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:04:56,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:04:56,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:04:56,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:56,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4431b80a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56, skipping insertion in model container [2023-08-30 06:04:56,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:56,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:04:56,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:04:56,868 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-30 06:04:56,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:04:56,888 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:04:56,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:04:56,917 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-30 06:04:56,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:04:56,926 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:04:56,949 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-30 06:04:56,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:04:56,960 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:04:56,960 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:04:56,965 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:04:56,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56 WrapperNode [2023-08-30 06:04:56,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:04:56,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:04:56,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:04:56,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:04:56,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:56,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,030 INFO L138 Inliner]: procedures = 28, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 464 [2023-08-30 06:04:57,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:04:57,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:04:57,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:04:57,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:04:57,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:04:57,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:04:57,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:04:57,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:04:57,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (1/1) ... [2023-08-30 06:04:57,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:04:57,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:04:57,145 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 06:04:57,176 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 06:04:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:04:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:04:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:04:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:04:57,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:04:57,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:04:57,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:04:57,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:04:57,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:04:57,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:04:57,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:04:57,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:04:57,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:04:57,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:04:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:04:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:04:57,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:04:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:04:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:04:57,202 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 06:04:57,331 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:04:57,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:04:58,067 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:04:58,262 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:04:58,263 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-30 06:04:58,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:04:58 BoogieIcfgContainer [2023-08-30 06:04:58,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:04:58,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:04:58,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:04:58,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:04:58,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:04:56" (1/3) ... [2023-08-30 06:04:58,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d28e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:04:58, skipping insertion in model container [2023-08-30 06:04:58,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:04:56" (2/3) ... [2023-08-30 06:04:58,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d28e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:04:58, skipping insertion in model container [2023-08-30 06:04:58,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:04:58" (3/3) ... [2023-08-30 06:04:58,273 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2023-08-30 06:04:58,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:04:58,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-08-30 06:04:58,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:04:58,397 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:04:58,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 387 transitions, 806 flow [2023-08-30 06:04:58,560 INFO L130 PetriNetUnfolder]: 37/383 cut-off events. [2023-08-30 06:04:58,573 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:04:58,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 383 events. 37/383 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 475 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-08-30 06:04:58,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 387 transitions, 806 flow [2023-08-30 06:04:58,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 355 places, 379 transitions, 782 flow [2023-08-30 06:04:58,589 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:04:58,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 355 places, 379 transitions, 782 flow [2023-08-30 06:04:58,607 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 355 places, 379 transitions, 782 flow [2023-08-30 06:04:58,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 379 transitions, 782 flow [2023-08-30 06:04:58,653 INFO L130 PetriNetUnfolder]: 37/379 cut-off events. [2023-08-30 06:04:58,655 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:04:58,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 379 events. 37/379 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 480 event pairs, 0 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-08-30 06:04:58,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 10736 [2023-08-30 06:05:43,326 WARN L222 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 166 DAG size of output: 163 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 06:05:46,284 INFO L134 LiptonReduction]: Checked pairs total: 13873 [2023-08-30 06:05:46,285 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-08-30 06:05:46,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:05:46,303 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;@2ebc2236, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:05:46,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 78 error locations. [2023-08-30 06:05:46,308 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:05:46,310 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:05:46,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:46,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:05:46,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-30 06:05:46,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash 62711, now seen corresponding path program 1 times [2023-08-30 06:05:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:05:46,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037288060] [2023-08-30 06:05:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:46,323 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 06:05:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:05:46,324 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 06:05:46,326 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 06:05:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:46,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:05:46,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:05:46,624 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:05:46,625 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:05:46,670 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 06:05:46,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:05:46,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:05:46,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037288060] [2023-08-30 06:05:46,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037288060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:46,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:46,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963343423] [2023-08-30 06:05:46,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:46,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:46,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:05:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:47,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 837 [2023-08-30 06:05:47,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:47,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:47,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 837 [2023-08-30 06:05:47,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:04,941 INFO L130 PetriNetUnfolder]: 110089/141191 cut-off events. [2023-08-30 06:06:04,941 INFO L131 PetriNetUnfolder]: For 1264/1264 co-relation queries the response was YES. [2023-08-30 06:06:05,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285318 conditions, 141191 events. 110089/141191 cut-off events. For 1264/1264 co-relation queries the response was YES. Maximal size of possible extension queue 10460. Compared 831614 event pairs, 93490 based on Foata normal form. 0/26095 useless extension candidates. Maximal degree in co-relation 134484. Up to 70599 conditions per place. [2023-08-30 06:06:05,622 INFO L137 encePairwiseOnDemand]: 824/837 looper letters, 149 selfloop transitions, 8 changer transitions 0/157 dead transitions. [2023-08-30 06:06:05,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 157 transitions, 676 flow [2023-08-30 06:06:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:06:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:06:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-08-30 06:06:05,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42931103146156907 [2023-08-30 06:06:05,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-08-30 06:06:05,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-08-30 06:06:05,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:05,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-08-30 06:06:05,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:05,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:05,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:05,663 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 188 flow. Second operand 3 states and 1078 transitions. [2023-08-30 06:06:05,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 157 transitions, 676 flow [2023-08-30 06:06:05,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 157 transitions, 644 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:06:05,862 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 238 flow [2023-08-30 06:06:05,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2023-08-30 06:06:05,865 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-30 06:06:05,865 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 238 flow [2023-08-30 06:06:05,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:05,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:05,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:06:05,875 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 06:06:06,073 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 06:06:06,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-30 06:06:06,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:06,074 INFO L85 PathProgramCache]: Analyzing trace with hash 62712, now seen corresponding path program 1 times [2023-08-30 06:06:06,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:06:06,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021413975] [2023-08-30 06:06:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:06:06,075 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 06:06:06,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:06:06,076 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 06:06:06,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:06:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:06:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:06:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:06:06,228 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:06:06,229 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:06:06,250 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 06:06:06,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:06:06,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:06:06,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021413975] [2023-08-30 06:06:06,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021413975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:06:06,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:06:06,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:06:06,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350165822] [2023-08-30 06:06:06,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:06:06,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:06:06,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:06:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:06:06,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:06:06,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 837 [2023-08-30 06:06:06,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:06,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:06:06,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 837 [2023-08-30 06:06:06,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:22,782 INFO L130 PetriNetUnfolder]: 110089/141183 cut-off events. [2023-08-30 06:06:22,782 INFO L131 PetriNetUnfolder]: For 360/360 co-relation queries the response was YES. [2023-08-30 06:06:22,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283603 conditions, 141183 events. 110089/141183 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 10460. Compared 832322 event pairs, 93490 based on Foata normal form. 6/26109 useless extension candidates. Maximal degree in co-relation 141776. Up to 141183 conditions per place. [2023-08-30 06:06:23,406 INFO L137 encePairwiseOnDemand]: 832/837 looper letters, 83 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 06:06:23,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 398 flow [2023-08-30 06:06:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:06:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:06:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 996 transitions. [2023-08-30 06:06:23,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966547192353644 [2023-08-30 06:06:23,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 996 transitions. [2023-08-30 06:06:23,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 996 transitions. [2023-08-30 06:06:23,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:23,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 996 transitions. [2023-08-30 06:06:23,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:23,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:23,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:23,416 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 238 flow. Second operand 3 states and 996 transitions. [2023-08-30 06:06:23,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 398 flow [2023-08-30 06:06:23,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 84 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:06:23,418 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 216 flow [2023-08-30 06:06:23,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2023-08-30 06:06:23,419 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -9 predicate places. [2023-08-30 06:06:23,419 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 216 flow [2023-08-30 06:06:23,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:23,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:23,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:06:23,433 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 06:06:23,627 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 06:06:23,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-30 06:06:23,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:23,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1951231, now seen corresponding path program 1 times [2023-08-30 06:06:23,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:06:23,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854108226] [2023-08-30 06:06:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:06:23,629 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 06:06:23,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:06:23,631 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 06:06:23,633 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 06:06:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:06:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:06:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:06:23,824 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:06:23,825 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:06:23,887 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 06:06:23,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:06:24,057 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 06:06:24,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:06:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854108226] [2023-08-30 06:06:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854108226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:06:24,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:06:24,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:06:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566875401] [2023-08-30 06:06:24,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:06:24,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:06:24,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:06:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:06:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:06:25,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 837 [2023-08-30 06:06:25,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:25,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:06:25,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 837 [2023-08-30 06:06:25,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:51,192 INFO L130 PetriNetUnfolder]: 165145/211792 cut-off events. [2023-08-30 06:06:51,192 INFO L131 PetriNetUnfolder]: For 540/540 co-relation queries the response was YES. [2023-08-30 06:06:51,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425438 conditions, 211792 events. 165145/211792 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 11869. Compared 1270774 event pairs, 140235 based on Foata normal form. 0/39155 useless extension candidates. Maximal degree in co-relation 425430. Up to 70598 conditions per place. [2023-08-30 06:06:52,139 INFO L137 encePairwiseOnDemand]: 822/837 looper letters, 206 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2023-08-30 06:06:52,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 241 transitions, 1070 flow [2023-08-30 06:06:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:06:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:06:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1963 transitions. [2023-08-30 06:06:52,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908801274392672 [2023-08-30 06:06:52,144 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1963 transitions. [2023-08-30 06:06:52,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1963 transitions. [2023-08-30 06:06:52,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:52,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1963 transitions. [2023-08-30 06:06:52,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 327.1666666666667) internal successors, (1963), 6 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,155 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,155 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 216 flow. Second operand 6 states and 1963 transitions. [2023-08-30 06:06:52,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 241 transitions, 1070 flow [2023-08-30 06:06:52,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 241 transitions, 1069 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:06:52,159 INFO L231 Difference]: Finished difference. Result has 86 places, 111 transitions, 478 flow [2023-08-30 06:06:52,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=86, PETRI_TRANSITIONS=111} [2023-08-30 06:06:52,160 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -1 predicate places. [2023-08-30 06:06:52,160 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 111 transitions, 478 flow [2023-08-30 06:06:52,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:52,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:52,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:06:52,169 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 06:06:52,368 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 06:06:52,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-30 06:06:52,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1876965082, now seen corresponding path program 1 times [2023-08-30 06:06:52,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:06:52,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259169666] [2023-08-30 06:06:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:06:52,370 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 06:06:52,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:06:52,371 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 06:06:52,372 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 06:06:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:06:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 06:06:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:06:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,692 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 06:06:52,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-30 06:06:52,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,827 INFO L321 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2023-08-30 06:06:52,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-08-30 06:06:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 06:06:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,050 INFO L321 Elim1Store]: treesize reduction 86, result has 28.3 percent of original size [2023-08-30 06:06:53,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 71 [2023-08-30 06:06:53,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 06:06:53,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,552 INFO L321 Elim1Store]: treesize reduction 108, result has 29.4 percent of original size [2023-08-30 06:06:53,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 87 [2023-08-30 06:06:53,872 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:06:53,873 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 06:06:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:06:53,978 INFO L321 Elim1Store]: treesize reduction 50, result has 29.6 percent of original size [2023-08-30 06:06:53,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 54 [2023-08-30 06:06:54,113 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 06:06:54,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:06:54,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:06:54,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259169666] [2023-08-30 06:06:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259169666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:06:54,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:06:54,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:06:54,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306501885] [2023-08-30 06:06:54,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:06:54,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:06:54,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:06:54,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:06:54,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:06:57,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:00,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:03,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:05,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:07,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:10,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:14,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:16,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:07:17,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 837 [2023-08-30 06:07:17,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 478 flow. Second operand has 6 states, 6 states have (on average 295.8333333333333) internal successors, (1775), 6 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:17,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:17,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 837 [2023-08-30 06:07:17,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:07:33,397 INFO L130 PetriNetUnfolder]: 92565/121062 cut-off events. [2023-08-30 06:07:33,397 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2023-08-30 06:07:33,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244061 conditions, 121062 events. 92565/121062 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 7321. Compared 729224 event pairs, 78027 based on Foata normal form. 0/28803 useless extension candidates. Maximal degree in co-relation 244048. Up to 121062 conditions per place. [2023-08-30 06:07:34,090 INFO L137 encePairwiseOnDemand]: 832/837 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-30 06:07:34,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 103 transitions, 644 flow [2023-08-30 06:07:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:07:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:07:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2023-08-30 06:07:34,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831142970927917 [2023-08-30 06:07:34,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2023-08-30 06:07:34,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2023-08-30 06:07:34,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:07:34,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2023-08-30 06:07:34,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:34,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:34,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:34,104 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 478 flow. Second operand 3 states and 962 transitions. [2023-08-30 06:07:34,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 103 transitions, 644 flow [2023-08-30 06:07:34,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 103 transitions, 603 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-30 06:07:34,108 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 399 flow [2023-08-30 06:07:34,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=399, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2023-08-30 06:07:34,109 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2023-08-30 06:07:34,110 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 399 flow [2023-08-30 06:07:34,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 295.8333333333333) internal successors, (1775), 6 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:34,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:07:34,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:07:34,122 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 06:07:34,311 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 06:07:34,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-30 06:07:34,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:07:34,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1993279753, now seen corresponding path program 2 times [2023-08-30 06:07:34,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:07:34,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189005586] [2023-08-30 06:07:34,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:07:34,313 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 06:07:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:07:34,317 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 06:07:34,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:07:34,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:07:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:07:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:07:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:07:34,574 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:07:34,575 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:07:34,698 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 06:07:34,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:07:35,252 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 06:07:35,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:07:35,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189005586] [2023-08-30 06:07:35,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189005586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:07:35,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:07:35,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:07:35,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721594552] [2023-08-30 06:07:35,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:07:35,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:07:35,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:07:35,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:07:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:07:40,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 837 [2023-08-30 06:07:40,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 399 flow. Second operand has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:40,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:40,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 837 [2023-08-30 06:07:40,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:07:43,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:07:44,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:07:46,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:07:49,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:07:51,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:07:53,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:07:57,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:07:58,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:08:05,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:08:07,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:08:09,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:09:04,841 INFO L130 PetriNetUnfolder]: 308525/403485 cut-off events. [2023-08-30 06:09:04,841 INFO L131 PetriNetUnfolder]: For 1887/1887 co-relation queries the response was YES. [2023-08-30 06:09:05,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813209 conditions, 403485 events. 308525/403485 cut-off events. For 1887/1887 co-relation queries the response was YES. Maximal size of possible extension queue 10443. Compared 2582677 event pairs, 260090 based on Foata normal form. 22/95966 useless extension candidates. Maximal degree in co-relation 813195. Up to 40374 conditions per place. [2023-08-30 06:09:06,761 INFO L137 encePairwiseOnDemand]: 824/837 looper letters, 622 selfloop transitions, 73 changer transitions 0/695 dead transitions. [2023-08-30 06:09:06,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 695 transitions, 3261 flow [2023-08-30 06:09:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:09:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:09:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5052 transitions. [2023-08-30 06:09:06,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402389486260454 [2023-08-30 06:09:06,773 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5052 transitions. [2023-08-30 06:09:06,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5052 transitions. [2023-08-30 06:09:06,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:09:06,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5052 transitions. [2023-08-30 06:09:06,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 336.8) internal successors, (5052), 15 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:06,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 837.0) internal successors, (13392), 16 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:06,795 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 837.0) internal successors, (13392), 16 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:06,795 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 399 flow. Second operand 15 states and 5052 transitions. [2023-08-30 06:09:06,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 695 transitions, 3261 flow [2023-08-30 06:09:06,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 695 transitions, 3260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:09:06,803 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 942 flow [2023-08-30 06:09:06,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=942, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2023-08-30 06:09:06,804 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 19 predicate places. [2023-08-30 06:09:06,804 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 942 flow [2023-08-30 06:09:06,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:06,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:09:06,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:09:06,819 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 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:09:07,016 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 06:09:07,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-30 06:09:07,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:09:07,017 INFO L85 PathProgramCache]: Analyzing trace with hash -122771836, now seen corresponding path program 1 times [2023-08-30 06:09:07,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:09:07,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22495419] [2023-08-30 06:09:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:09:07,018 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 06:09:07,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:09:07,019 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 06:09:07,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:09:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:09:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:09:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:09:07,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:09:07,240 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 06:09:07,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 06:09:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:09:07,743 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2023-08-30 06:09:07,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 06:09:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:09:08,451 INFO L321 Elim1Store]: treesize reduction 66, result has 49.2 percent of original size [2023-08-30 06:09:08,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 75 treesize of output 138 [2023-08-30 06:09:16,930 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-30 06:09:16,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 178 [2023-08-30 06:09:37,502 WARN L222 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 232 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:09:37,688 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 06:09:37,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:09:37,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:09:37,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22495419] [2023-08-30 06:09:37,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22495419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:09:37,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:09:37,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:09:37,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428668545] [2023-08-30 06:09:37,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:09:37,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:09:37,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:09:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:09:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2023-08-30 06:09:42,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:09:45,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 837 [2023-08-30 06:09:45,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 942 flow. Second operand has 6 states, 6 states have (on average 278.1666666666667) internal successors, (1669), 6 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:09:45,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:09:45,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 837 [2023-08-30 06:09:45,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:10:36,392 INFO L130 PetriNetUnfolder]: 301905/394565 cut-off events. [2023-08-30 06:10:36,393 INFO L131 PetriNetUnfolder]: For 1968/1968 co-relation queries the response was YES. [2023-08-30 06:10:37,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795545 conditions, 394565 events. 301905/394565 cut-off events. For 1968/1968 co-relation queries the response was YES. Maximal size of possible extension queue 10010. Compared 2547092 event pairs, 254560 based on Foata normal form. 0/94872 useless extension candidates. Maximal degree in co-relation 795520. Up to 394565 conditions per place. [2023-08-30 06:10:39,092 INFO L137 encePairwiseOnDemand]: 834/837 looper letters, 144 selfloop transitions, 1 changer transitions 0/145 dead transitions. [2023-08-30 06:10:39,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 145 transitions, 1228 flow [2023-08-30 06:10:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:10:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:10:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-30 06:10:39,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36001592990840303 [2023-08-30 06:10:39,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-30 06:10:39,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-30 06:10:39,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:10:39,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-30 06:10:39,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:10:39,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:10:39,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:10:39,143 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 942 flow. Second operand 3 states and 904 transitions. [2023-08-30 06:10:39,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 145 transitions, 1228 flow [2023-08-30 06:10:39,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 145 transitions, 1092 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-08-30 06:10:39,149 INFO L231 Difference]: Finished difference. Result has 102 places, 145 transitions, 804 flow [2023-08-30 06:10:39,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=804, PETRI_PLACES=102, PETRI_TRANSITIONS=145} [2023-08-30 06:10:39,152 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 15 predicate places. [2023-08-30 06:10:39,152 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 145 transitions, 804 flow [2023-08-30 06:10:39,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 278.1666666666667) internal successors, (1669), 6 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:10:39,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:10:39,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:10:39,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:10:39,361 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 06:10:39,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-30 06:10:39,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:10:39,362 INFO L85 PathProgramCache]: Analyzing trace with hash -122771835, now seen corresponding path program 1 times [2023-08-30 06:10:39,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:10:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650698574] [2023-08-30 06:10:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:10:39,362 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 06:10:39,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:10:39,364 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 06:10:39,373 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 06:10:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:10:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:10:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:10:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,648 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 06:10:39,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 06:10:39,670 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:10:39,671 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 31 treesize of output 27 [2023-08-30 06:10:39,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,723 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 06:10:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,743 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 06:10:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:10:39,783 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 06:10:39,825 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 06:10:39,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:10:39,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:10:39,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650698574] [2023-08-30 06:10:39,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650698574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:10:39,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:10:39,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:10:39,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045606963] [2023-08-30 06:10:39,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:10:39,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:10:39,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:10:39,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:10:39,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:10:40,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 837 [2023-08-30 06:10:40,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 145 transitions, 804 flow. Second operand has 4 states, 4 states have (on average 317.75) internal successors, (1271), 4 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:10:40,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:10:40,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 837 [2023-08-30 06:10:40,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand