./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --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 07:36:52,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:36:52,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:36:53,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:36:53,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:36:53,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:36:53,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:36:53,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:36:53,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:36:53,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:36:53,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:36:53,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:36:53,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:36:53,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:36:53,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:36:53,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:36:53,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:36:53,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:36:53,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:36:53,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:36:53,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:36:53,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:36:53,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:36:53,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:36:53,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:36:53,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:36:53,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:36:53,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:36:53,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:36:53,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:36:53,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:36:53,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:36:53,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:36:53,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:36:53,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:36:53,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:36:53,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:36:53,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:36:53,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:36:53,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:36:53,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:36:53,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:36:53,117 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:36:53,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:36:53,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:36:53,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:36:53,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:36:53,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:36:53,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:36:53,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:36:53,121 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:36:53,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:36:53,122 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:36:53,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:36:53,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:36:53,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:36:53,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:36:53,123 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:36:53,123 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:36:53,123 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:36:53,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:36:53,125 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:36:53,125 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:36:53,128 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:36:53,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:36:53,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:36:53,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:36:53,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:36:53,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:36:53,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:36:53,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:36:53,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:36:53,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:36:53,132 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:36:53,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:36:53,132 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:36:53,133 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:36:53,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:36:53,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:36:53,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:36:53,460 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:36:53,461 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:36:53,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-30 07:36:54,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:36:54,871 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:36:54,871 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-30 07:36:54,879 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f77aa8ad/7e4652a0402a460e982dc6ed9dcb3444/FLAG23ab0f0e9 [2023-08-30 07:36:54,899 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f77aa8ad/7e4652a0402a460e982dc6ed9dcb3444 [2023-08-30 07:36:54,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:36:54,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:36:54,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:36:54,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:36:54,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:36:54,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:36:54" (1/1) ... [2023-08-30 07:36:54,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e0174c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:54, skipping insertion in model container [2023-08-30 07:36:54,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:36:54" (1/1) ... [2023-08-30 07:36:54,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:36:54,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:36:55,102 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/test-context1.wvr.c[2433,2446] [2023-08-30 07:36:55,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:36:55,127 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 07:36:55,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52bf6aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:55, skipping insertion in model container [2023-08-30 07:36:55,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:36:55,129 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:36:55,131 INFO L158 Benchmark]: Toolchain (without parser) took 227.13ms. Allocated memory is still 77.6MB. Free memory was 55.0MB in the beginning and 45.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:36:55,132 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:36:55,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.23ms. Allocated memory is still 77.6MB. Free memory was 54.9MB in the beginning and 45.5MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:36:55,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.23ms. Allocated memory is still 77.6MB. Free memory was 54.9MB in the beginning and 45.5MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --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 07:36:56,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:36:56,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:36:56,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:36:56,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:36:56,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:36:56,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:36:56,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:36:56,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:36:56,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:36:56,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:36:56,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:36:56,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:36:56,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:36:56,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:36:56,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:36:56,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:36:56,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:36:56,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:36:56,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:36:56,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:36:56,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:36:56,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:36:56,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:36:56,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:36:56,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:36:56,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:36:56,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:36:56,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:36:56,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:36:56,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:36:56,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:36:56,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:36:56,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:36:56,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:36:56,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:36:56,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:36:56,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:36:56,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:36:56,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:36:56,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:36:56,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:36:57,027 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:36:57,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:36:57,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:36:57,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:36:57,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:36:57,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:36:57,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:36:57,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:36:57,031 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:36:57,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:36:57,032 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:36:57,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:36:57,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:36:57,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:36:57,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:36:57,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:36:57,033 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:36:57,033 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:36:57,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:36:57,033 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:36:57,033 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:36:57,034 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:36:57,034 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:36:57,034 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:36:57,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:36:57,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:36:57,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:36:57,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:36:57,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:36:57,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:36:57,035 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:36:57,036 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:36:57,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:36:57,036 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:36:57,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:36:57,037 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:36:57,037 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:36:57,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:36:57,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:36:57,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:36:57,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:36:57,401 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:36:57,401 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:36:57,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-30 07:36:58,486 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:36:58,724 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:36:58,724 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-30 07:36:58,735 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/372acdc71/3d6f4dfa3a3746d390b1785315072ee1/FLAGaf5000b12 [2023-08-30 07:36:58,749 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/372acdc71/3d6f4dfa3a3746d390b1785315072ee1 [2023-08-30 07:36:58,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:36:58,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:36:58,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:36:58,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:36:58,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:36:58,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:36:58" (1/1) ... [2023-08-30 07:36:58,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ffa74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:58, skipping insertion in model container [2023-08-30 07:36:58,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:36:58" (1/1) ... [2023-08-30 07:36:58,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:36:58,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:36:58,965 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/test-context1.wvr.c[2433,2446] [2023-08-30 07:36:58,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:36:58,990 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:36:59,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:36:59,021 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/test-context1.wvr.c[2433,2446] [2023-08-30 07:36:59,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:36:59,037 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:36:59,068 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/test-context1.wvr.c[2433,2446] [2023-08-30 07:36:59,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:36:59,086 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:36:59,087 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:36:59,092 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:36:59,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59 WrapperNode [2023-08-30 07:36:59,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:36:59,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:36:59,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:36:59,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:36:59,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,154 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 133 [2023-08-30 07:36:59,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:36:59,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:36:59,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:36:59,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:36:59,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,202 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:36:59,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:36:59,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:36:59,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:36:59,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (1/1) ... [2023-08-30 07:36:59,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:36:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:36:59,246 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 07:36:59,261 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 07:36:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:36:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:36:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:36:59,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:36:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:36:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:36:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:36:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:36:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:36:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:36:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:36:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:36:59,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:36:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:36:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:36:59,291 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 07:36:59,428 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:36:59,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:36:59,786 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:36:59,951 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:36:59,953 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:36:59,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:36:59 BoogieIcfgContainer [2023-08-30 07:36:59,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:36:59,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:36:59,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:36:59,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:36:59,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:36:58" (1/3) ... [2023-08-30 07:36:59,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a22e01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:36:59, skipping insertion in model container [2023-08-30 07:36:59,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:59" (2/3) ... [2023-08-30 07:36:59,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a22e01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:36:59, skipping insertion in model container [2023-08-30 07:36:59,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:36:59" (3/3) ... [2023-08-30 07:36:59,963 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-08-30 07:36:59,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:36:59,987 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 07:36:59,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:37:00,059 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:37:00,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 268 flow [2023-08-30 07:37:00,169 INFO L130 PetriNetUnfolder]: 9/124 cut-off events. [2023-08-30 07:37:00,170 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:37:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 9/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2023-08-30 07:37:00,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 126 transitions, 268 flow [2023-08-30 07:37:00,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 120 transitions, 252 flow [2023-08-30 07:37:00,191 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:37:00,203 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 120 transitions, 252 flow [2023-08-30 07:37:00,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 120 transitions, 252 flow [2023-08-30 07:37:00,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 252 flow [2023-08-30 07:37:00,249 INFO L130 PetriNetUnfolder]: 9/120 cut-off events. [2023-08-30 07:37:00,249 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:37:00,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 120 events. 9/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2023-08-30 07:37:00,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-30 07:37:10,582 INFO L134 LiptonReduction]: Checked pairs total: 1055 [2023-08-30 07:37:10,583 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-30 07:37:10,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:37:10,599 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;@66d48266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:37:10,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 07:37:10,601 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:37:10,601 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:37:10,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:10,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:37:10,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:10,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash 18173, now seen corresponding path program 1 times [2023-08-30 07:37:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:10,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705050499] [2023-08-30 07:37:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:10,623 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 07:37:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:10,626 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 07:37:10,633 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 (2)] Waiting until timeout for monitored process [2023-08-30 07:37:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:37:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:10,797 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:37:10,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 07:37:10,818 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 07:37:10,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:10,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:10,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705050499] [2023-08-30 07:37:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705050499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:10,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:10,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:37:10,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705816735] [2023-08-30 07:37:10,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:10,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:37:10,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:37:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:37:10,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-08-30 07:37:10,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:10,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:10,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-08-30 07:37:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:11,062 INFO L130 PetriNetUnfolder]: 146/249 cut-off events. [2023-08-30 07:37:11,062 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 07:37:11,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 249 events. 146/249 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 801 event pairs, 105 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 424. Up to 249 conditions per place. [2023-08-30 07:37:11,065 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 07:37:11,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 124 flow [2023-08-30 07:37:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:37:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:37:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-30 07:37:11,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448818897637795 [2023-08-30 07:37:11,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-30 07:37:11,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-30 07:37:11,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:11,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-30 07:37:11,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,093 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 339 transitions. [2023-08-30 07:37:11,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 124 flow [2023-08-30 07:37:11,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:37:11,097 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 62 flow [2023-08-30 07:37:11,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-08-30 07:37:11,102 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-08-30 07:37:11,102 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 62 flow [2023-08-30 07:37:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:11,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:37:11,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:11,313 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 07:37:11,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:11,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 18200, now seen corresponding path program 1 times [2023-08-30 07:37:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529575035] [2023-08-30 07:37:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:11,315 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 07:37:11,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:11,317 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 07:37:11,320 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 07:37:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:37:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:11,408 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 07:37:11,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 07:37:11,433 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 07:37:11,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:11,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529575035] [2023-08-30 07:37:11,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529575035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:11,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:11,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:37:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508914702] [2023-08-30 07:37:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:37:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:37:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:37:11,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-08-30 07:37:11,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:11,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-08-30 07:37:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:11,647 INFO L130 PetriNetUnfolder]: 114/200 cut-off events. [2023-08-30 07:37:11,647 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:37:11,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 200 events. 114/200 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 611 event pairs, 81 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 403. Up to 200 conditions per place. [2023-08-30 07:37:11,649 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 07:37:11,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 110 flow [2023-08-30 07:37:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:37:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:37:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-30 07:37:11,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304461942257218 [2023-08-30 07:37:11,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-30 07:37:11,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-30 07:37:11,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:11,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-30 07:37:11,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,657 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 62 flow. Second operand 3 states and 328 transitions. [2023-08-30 07:37:11,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 110 flow [2023-08-30 07:37:11,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:37:11,658 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 59 flow [2023-08-30 07:37:11,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-30 07:37:11,659 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-08-30 07:37:11,659 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 59 flow [2023-08-30 07:37:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:11,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:11,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:37:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:11,869 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 07:37:11,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:11,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash 18174, now seen corresponding path program 1 times [2023-08-30 07:37:11,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:11,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70119907] [2023-08-30 07:37:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:11,871 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 07:37:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:11,872 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 07:37:11,875 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 07:37:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:37:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:12,015 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:12,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:12,044 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 07:37:12,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:12,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70119907] [2023-08-30 07:37:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70119907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:12,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:12,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:37:12,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995551945] [2023-08-30 07:37:12,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:12,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:37:12,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:12,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:37:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:37:12,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-08-30 07:37:12,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:12,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:12,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-08-30 07:37:12,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:12,389 INFO L130 PetriNetUnfolder]: 227/398 cut-off events. [2023-08-30 07:37:12,390 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 07:37:12,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 398 events. 227/398 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1543 event pairs, 162 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 804. Up to 201 conditions per place. [2023-08-30 07:37:12,395 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 48 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-30 07:37:12,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 50 transitions, 211 flow [2023-08-30 07:37:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:37:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:37:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-30 07:37:12,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47244094488188976 [2023-08-30 07:37:12,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-30 07:37:12,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-30 07:37:12,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:12,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-30 07:37:12,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:12,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:12,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:12,403 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 59 flow. Second operand 3 states and 360 transitions. [2023-08-30 07:37:12,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 50 transitions, 211 flow [2023-08-30 07:37:12,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:37:12,407 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 70 flow [2023-08-30 07:37:12,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-30 07:37:12,408 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-30 07:37:12,409 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 70 flow [2023-08-30 07:37:12,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:12,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:12,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:37:12,420 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 07:37:12,618 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 07:37:12,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:12,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash 18199, now seen corresponding path program 1 times [2023-08-30 07:37:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:12,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298784503] [2023-08-30 07:37:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:12,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:12,621 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 07:37:12,624 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 07:37:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:37:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:37:12,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:37:12,730 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:37:12,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 07:37:12,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 07:37:12,779 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 07:37:12,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:12,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:12,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298784503] [2023-08-30 07:37:12,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298784503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:12,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:12,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:37:12,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332071142] [2023-08-30 07:37:12,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:12,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:37:12,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:37:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:37:12,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-08-30 07:37:12,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:12,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:12,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-08-30 07:37:12,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:13,007 INFO L130 PetriNetUnfolder]: 163/300 cut-off events. [2023-08-30 07:37:13,008 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 07:37:13,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 300 events. 163/300 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1106 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 612. Up to 300 conditions per place. [2023-08-30 07:37:13,010 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 07:37:13,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 116 flow [2023-08-30 07:37:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:37:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:37:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-30 07:37:13,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43963254593175854 [2023-08-30 07:37:13,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-30 07:37:13,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-30 07:37:13,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:13,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-30 07:37:13,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:13,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:13,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:13,016 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 70 flow. Second operand 3 states and 335 transitions. [2023-08-30 07:37:13,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 116 flow [2023-08-30 07:37:13,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:37:13,018 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2023-08-30 07:37:13,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-30 07:37:13,018 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-08-30 07:37:13,019 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2023-08-30 07:37:13,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:13,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:13,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:37:13,028 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 07:37:13,228 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 07:37:13,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:13,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash 564859, now seen corresponding path program 1 times [2023-08-30 07:37:13,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:13,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628126774] [2023-08-30 07:37:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:13,230 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 07:37:13,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:13,231 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 07:37:13,234 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 07:37:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:37:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:13,356 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:13,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:13,412 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 07:37:13,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:37:13,620 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 07:37:13,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:13,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628126774] [2023-08-30 07:37:13,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628126774] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:37:13,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:37:13,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:37:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904263728] [2023-08-30 07:37:13,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:37:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:37:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:13,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:37:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:37:14,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 254 [2023-08-30 07:37:14,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 66 flow. Second operand has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:14,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:14,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 254 [2023-08-30 07:37:14,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:14,566 INFO L130 PetriNetUnfolder]: 246/453 cut-off events. [2023-08-30 07:37:14,567 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:37:14,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 453 events. 246/453 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1865 event pairs, 171 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 925. Up to 151 conditions per place. [2023-08-30 07:37:14,569 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 65 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-08-30 07:37:14,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 72 transitions, 318 flow [2023-08-30 07:37:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:37:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:37:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 663 transitions. [2023-08-30 07:37:14,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43503937007874016 [2023-08-30 07:37:14,571 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 663 transitions. [2023-08-30 07:37:14,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 663 transitions. [2023-08-30 07:37:14,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:14,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 663 transitions. [2023-08-30 07:37:14,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.5) internal successors, (663), 6 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:14,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:14,577 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:14,577 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 66 flow. Second operand 6 states and 663 transitions. [2023-08-30 07:37:14,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 72 transitions, 318 flow [2023-08-30 07:37:14,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 72 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:37:14,579 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 119 flow [2023-08-30 07:37:14,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-30 07:37:14,580 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-30 07:37:14,580 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 119 flow [2023-08-30 07:37:14,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:14,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:14,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:37:14,591 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 07:37:14,789 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 07:37:14,790 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:14,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash 17504350, now seen corresponding path program 1 times [2023-08-30 07:37:14,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:14,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016419754] [2023-08-30 07:37:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:14,792 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 07:37:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:14,793 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 07:37:14,795 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 07:37:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:14,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:37:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:14,878 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:37:14,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 07:37:14,907 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 07:37:14,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:14,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016419754] [2023-08-30 07:37:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016419754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:14,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:14,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:37:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29111870] [2023-08-30 07:37:14,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:14,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:37:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:37:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:37:14,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-08-30 07:37:14,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:14,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:14,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-08-30 07:37:14,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:15,100 INFO L130 PetriNetUnfolder]: 222/405 cut-off events. [2023-08-30 07:37:15,100 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 07:37:15,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 405 events. 222/405 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1626 event pairs, 153 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 850. Up to 405 conditions per place. [2023-08-30 07:37:15,103 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 07:37:15,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 171 flow [2023-08-30 07:37:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:37:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:37:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-30 07:37:15,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251968503937008 [2023-08-30 07:37:15,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-30 07:37:15,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-30 07:37:15,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:15,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-30 07:37:15,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,109 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 119 flow. Second operand 3 states and 324 transitions. [2023-08-30 07:37:15,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 171 flow [2023-08-30 07:37:15,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 161 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:37:15,111 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 107 flow [2023-08-30 07:37:15,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-30 07:37:15,112 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-30 07:37:15,112 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 107 flow [2023-08-30 07:37:15,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:15,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:37:15,124 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 07:37:15,322 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 07:37:15,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:15,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash 17504352, now seen corresponding path program 1 times [2023-08-30 07:37:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:15,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782114259] [2023-08-30 07:37:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:15,323 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 07:37:15,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:15,324 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 07:37:15,329 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 07:37:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:37:15,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:15,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:37:15,442 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 07:37:15,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 07:37:15,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 07:37:15,482 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 07:37:15,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:15,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:15,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782114259] [2023-08-30 07:37:15,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782114259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:15,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:15,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:37:15,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102209489] [2023-08-30 07:37:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:15,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:37:15,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:37:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:37:15,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 254 [2023-08-30 07:37:15,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:15,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 254 [2023-08-30 07:37:15,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:15,674 INFO L130 PetriNetUnfolder]: 198/357 cut-off events. [2023-08-30 07:37:15,675 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 07:37:15,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 357 events. 198/357 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1377 event pairs, 135 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 750. Up to 357 conditions per place. [2023-08-30 07:37:15,677 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 07:37:15,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 155 flow [2023-08-30 07:37:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:37:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:37:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-30 07:37:15,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343832020997375 [2023-08-30 07:37:15,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-30 07:37:15,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-30 07:37:15,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:15,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-30 07:37:15,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,682 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 107 flow. Second operand 3 states and 331 transitions. [2023-08-30 07:37:15,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 155 flow [2023-08-30 07:37:15,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:37:15,686 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 104 flow [2023-08-30 07:37:15,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-30 07:37:15,687 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-30 07:37:15,687 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 104 flow [2023-08-30 07:37:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:15,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:15,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:37:15,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 07:37:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:15,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:15,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash 17504340, now seen corresponding path program 1 times [2023-08-30 07:37:15,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:15,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928394054] [2023-08-30 07:37:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:15,898 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 07:37:15,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:15,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:15,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:37:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:37:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:16,028 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:16,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:16,099 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 07:37:16,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:16,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928394054] [2023-08-30 07:37:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928394054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:16,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:16,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:37:16,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741250379] [2023-08-30 07:37:16,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:16,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:37:16,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:16,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:37:16,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:37:16,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-08-30 07:37:16,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:16,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:16,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-08-30 07:37:16,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:16,511 INFO L130 PetriNetUnfolder]: 258/489 cut-off events. [2023-08-30 07:37:16,511 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 07:37:16,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 489 events. 258/489 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2257 event pairs, 93 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 1023. Up to 361 conditions per place. [2023-08-30 07:37:16,514 INFO L137 encePairwiseOnDemand]: 247/254 looper letters, 32 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-08-30 07:37:16,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 203 flow [2023-08-30 07:37:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:37:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:37:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-08-30 07:37:16,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281496062992126 [2023-08-30 07:37:16,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-08-30 07:37:16,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-08-30 07:37:16,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:16,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-08-30 07:37:16,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:16,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:16,520 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:16,520 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 104 flow. Second operand 4 states and 435 transitions. [2023-08-30 07:37:16,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 203 flow [2023-08-30 07:37:16,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:37:16,525 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 129 flow [2023-08-30 07:37:16,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-30 07:37:16,527 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-30 07:37:16,527 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 129 flow [2023-08-30 07:37:16,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:16,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:16,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:37:16,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:16,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:16,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:16,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash 17504341, now seen corresponding path program 1 times [2023-08-30 07:37:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:16,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609003699] [2023-08-30 07:37:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:16,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:16,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:16,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:16,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:37:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:37:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:16,837 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:37:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 07:37:16,855 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 07:37:16,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:16,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:16,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609003699] [2023-08-30 07:37:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609003699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:16,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:16,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:37:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354485019] [2023-08-30 07:37:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:16,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:37:16,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:37:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:37:16,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 254 [2023-08-30 07:37:16,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:16,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:16,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 254 [2023-08-30 07:37:16,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:17,103 INFO L130 PetriNetUnfolder]: 165/324 cut-off events. [2023-08-30 07:37:17,103 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-30 07:37:17,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 324 events. 165/324 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1275 event pairs, 114 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 824. Up to 317 conditions per place. [2023-08-30 07:37:17,105 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 21 selfloop transitions, 4 changer transitions 0/25 dead transitions. [2023-08-30 07:37:17,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 25 transitions, 173 flow [2023-08-30 07:37:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:37:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:37:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 424 transitions. [2023-08-30 07:37:17,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41732283464566927 [2023-08-30 07:37:17,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 424 transitions. [2023-08-30 07:37:17,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 424 transitions. [2023-08-30 07:37:17,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:17,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 424 transitions. [2023-08-30 07:37:17,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:17,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:17,111 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:17,111 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 129 flow. Second operand 4 states and 424 transitions. [2023-08-30 07:37:17,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 25 transitions, 173 flow [2023-08-30 07:37:17,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 25 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:37:17,112 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 125 flow [2023-08-30 07:37:17,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-08-30 07:37:17,113 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-30 07:37:17,114 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 125 flow [2023-08-30 07:37:17,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:17,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:17,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:37:17,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:17,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:17,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:17,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash 542635102, now seen corresponding path program 1 times [2023-08-30 07:37:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:17,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858705627] [2023-08-30 07:37:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:17,324 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 07:37:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:17,325 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:17,326 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 (11)] Waiting until timeout for monitored process [2023-08-30 07:37:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:17,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:37:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:17,459 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:17,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:37:17,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:17,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858705627] [2023-08-30 07:37:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858705627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:17,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:37:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380489740] [2023-08-30 07:37:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:17,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:37:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:37:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:37:17,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-08-30 07:37:17,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:17,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:17,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-08-30 07:37:17,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:18,011 INFO L130 PetriNetUnfolder]: 120/247 cut-off events. [2023-08-30 07:37:18,011 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-30 07:37:18,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 247 events. 120/247 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 898 event pairs, 85 based on Foata normal form. 6/221 useless extension candidates. Maximal degree in co-relation 616. Up to 219 conditions per place. [2023-08-30 07:37:18,012 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 33 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-30 07:37:18,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 231 flow [2023-08-30 07:37:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:37:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:37:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2023-08-30 07:37:18,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242125984251969 [2023-08-30 07:37:18,014 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 431 transitions. [2023-08-30 07:37:18,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 431 transitions. [2023-08-30 07:37:18,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:18,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 431 transitions. [2023-08-30 07:37:18,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:18,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:18,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:18,018 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 125 flow. Second operand 4 states and 431 transitions. [2023-08-30 07:37:18,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 231 flow [2023-08-30 07:37:18,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:37:18,020 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 143 flow [2023-08-30 07:37:18,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-08-30 07:37:18,022 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-30 07:37:18,022 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 143 flow [2023-08-30 07:37:18,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:18,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:18,022 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:37:18,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:18,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:18,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:18,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -350699970, now seen corresponding path program 2 times [2023-08-30 07:37:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:18,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491620073] [2023-08-30 07:37:18,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:37:18,232 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 07:37:18,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:18,233 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:18,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 07:37:18,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:37:18,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:37:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:37:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:18,359 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:18,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:18,493 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 07:37:18,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:37:18,970 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 07:37:18,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491620073] [2023-08-30 07:37:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491620073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:37:18,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:37:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:37:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023904347] [2023-08-30 07:37:18,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:37:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:37:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:37:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:37:20,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 254 [2023-08-30 07:37:20,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 143 flow. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:20,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:20,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 254 [2023-08-30 07:37:20,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:23,099 INFO L130 PetriNetUnfolder]: 497/987 cut-off events. [2023-08-30 07:37:23,099 INFO L131 PetriNetUnfolder]: For 308/308 co-relation queries the response was YES. [2023-08-30 07:37:23,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 987 events. 497/987 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4844 event pairs, 351 based on Foata normal form. 6/849 useless extension candidates. Maximal degree in co-relation 2500. Up to 343 conditions per place. [2023-08-30 07:37:23,104 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 157 selfloop transitions, 12 changer transitions 0/169 dead transitions. [2023-08-30 07:37:23,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 169 transitions, 974 flow [2023-08-30 07:37:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:37:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:37:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1354 transitions. [2023-08-30 07:37:23,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44422572178477693 [2023-08-30 07:37:23,109 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1354 transitions. [2023-08-30 07:37:23,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1354 transitions. [2023-08-30 07:37:23,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:23,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1354 transitions. [2023-08-30 07:37:23,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 112.83333333333333) internal successors, (1354), 12 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:23,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:23,117 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:23,117 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 143 flow. Second operand 12 states and 1354 transitions. [2023-08-30 07:37:23,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 169 transitions, 974 flow [2023-08-30 07:37:23,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 169 transitions, 964 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:37:23,121 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 234 flow [2023-08-30 07:37:23,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=234, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-08-30 07:37:23,122 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-08-30 07:37:23,122 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 234 flow [2023-08-30 07:37:23,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:23,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:23,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:37:23,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:23,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:23,332 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:23,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash -350941247, now seen corresponding path program 1 times [2023-08-30 07:37:23,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:23,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598252514] [2023-08-30 07:37:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:23,334 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 07:37:23,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:23,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:23,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:37:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:37:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:23,467 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:23,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:37:23,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:37:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:37:24,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598252514] [2023-08-30 07:37:24,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598252514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:37:24,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:37:24,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:37:24,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733742221] [2023-08-30 07:37:24,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:37:24,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:37:24,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:24,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:37:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:37:24,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 254 [2023-08-30 07:37:24,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 234 flow. Second operand has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:24,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:24,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 254 [2023-08-30 07:37:24,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:27,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:29,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:31,701 WARN L539 Checker$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 07:37:33,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:35,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:37,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:38,286 INFO L130 PetriNetUnfolder]: 1397/2661 cut-off events. [2023-08-30 07:37:38,286 INFO L131 PetriNetUnfolder]: For 429/429 co-relation queries the response was YES. [2023-08-30 07:37:38,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6587 conditions, 2661 events. 1397/2661 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16629 event pairs, 162 based on Foata normal form. 0/2355 useless extension candidates. Maximal degree in co-relation 6559. Up to 973 conditions per place. [2023-08-30 07:37:38,298 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 72 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2023-08-30 07:37:38,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 552 flow [2023-08-30 07:37:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:37:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:37:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 862 transitions. [2023-08-30 07:37:38,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242125984251969 [2023-08-30 07:37:38,302 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 862 transitions. [2023-08-30 07:37:38,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 862 transitions. [2023-08-30 07:37:38,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:38,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 862 transitions. [2023-08-30 07:37:38,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:38,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:38,307 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:38,308 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 234 flow. Second operand 8 states and 862 transitions. [2023-08-30 07:37:38,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 552 flow [2023-08-30 07:37:38,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 527 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 07:37:38,311 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 298 flow [2023-08-30 07:37:38,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-30 07:37:38,312 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2023-08-30 07:37:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 298 flow [2023-08-30 07:37:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:38,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:38,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:37:38,325 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 (13)] Ended with exit code 0 [2023-08-30 07:37:38,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:38,522 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:38,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash -934251311, now seen corresponding path program 1 times [2023-08-30 07:37:38,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:38,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180845621] [2023-08-30 07:37:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:38,523 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 07:37:38,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:38,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:38,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:37:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:37:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:37:38,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:37:38,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-08-30 07:37:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:37:39,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180845621] [2023-08-30 07:37:39,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180845621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:37:39,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:37:39,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:37:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52588978] [2023-08-30 07:37:39,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:37:39,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:37:39,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:37:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:37:39,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-08-30 07:37:39,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 298 flow. Second operand has 10 states, 10 states have (on average 101.8) internal successors, (1018), 10 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:39,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:39,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-08-30 07:37:39,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:43,254 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 07:37:45,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:46,603 INFO L130 PetriNetUnfolder]: 2234/4290 cut-off events. [2023-08-30 07:37:46,604 INFO L131 PetriNetUnfolder]: For 4218/4218 co-relation queries the response was YES. [2023-08-30 07:37:46,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13209 conditions, 4290 events. 2234/4290 cut-off events. For 4218/4218 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29893 event pairs, 162 based on Foata normal form. 450/4740 useless extension candidates. Maximal degree in co-relation 13176. Up to 1549 conditions per place. [2023-08-30 07:37:46,666 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 109 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2023-08-30 07:37:46,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 832 flow [2023-08-30 07:37:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:37:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:37:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1217 transitions. [2023-08-30 07:37:46,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355762347888332 [2023-08-30 07:37:46,672 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1217 transitions. [2023-08-30 07:37:46,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1217 transitions. [2023-08-30 07:37:46,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:46,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1217 transitions. [2023-08-30 07:37:46,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 110.63636363636364) internal successors, (1217), 11 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:46,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:46,701 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:46,702 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 298 flow. Second operand 11 states and 1217 transitions. [2023-08-30 07:37:46,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 832 flow [2023-08-30 07:37:46,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 804 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 07:37:46,720 INFO L231 Difference]: Finished difference. Result has 78 places, 49 transitions, 396 flow [2023-08-30 07:37:46,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=396, PETRI_PLACES=78, PETRI_TRANSITIONS=49} [2023-08-30 07:37:46,721 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 44 predicate places. [2023-08-30 07:37:46,721 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 49 transitions, 396 flow [2023-08-30 07:37:46,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.8) internal successors, (1018), 10 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:46,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:46,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:37:46,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-30 07:37:46,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:46,932 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:46,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:46,932 INFO L85 PathProgramCache]: Analyzing trace with hash -934251652, now seen corresponding path program 1 times [2023-08-30 07:37:46,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:46,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705442479] [2023-08-30 07:37:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:46,933 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 07:37:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:46,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:46,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:37:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:37:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:37:47,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:37:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:37:47,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:47,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705442479] [2023-08-30 07:37:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705442479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:37:47,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:37:47,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:37:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892384828] [2023-08-30 07:37:47,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:37:47,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:37:47,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:37:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:37:47,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-08-30 07:37:47,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 49 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:47,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:47,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-08-30 07:37:47,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:47,988 INFO L130 PetriNetUnfolder]: 2486/4758 cut-off events. [2023-08-30 07:37:47,988 INFO L131 PetriNetUnfolder]: For 14961/14961 co-relation queries the response was YES. [2023-08-30 07:37:48,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17147 conditions, 4758 events. 2486/4758 cut-off events. For 14961/14961 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33155 event pairs, 684 based on Foata normal form. 252/5010 useless extension candidates. Maximal degree in co-relation 17107. Up to 2908 conditions per place. [2023-08-30 07:37:48,028 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 62 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2023-08-30 07:37:48,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 643 flow [2023-08-30 07:37:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:37:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:37:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-08-30 07:37:48,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468503937007874 [2023-08-30 07:37:48,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-08-30 07:37:48,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-08-30 07:37:48,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:48,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-08-30 07:37:48,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:48,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:48,034 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:48,034 INFO L175 Difference]: Start difference. First operand has 78 places, 49 transitions, 396 flow. Second operand 4 states and 476 transitions. [2023-08-30 07:37:48,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 643 flow [2023-08-30 07:37:48,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 627 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 07:37:48,086 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 443 flow [2023-08-30 07:37:48,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=443, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-08-30 07:37:48,087 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-08-30 07:37:48,087 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 443 flow [2023-08-30 07:37:48,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:48,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:48,088 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 07:37:48,095 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 (15)] Ended with exit code 0 [2023-08-30 07:37:48,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:48,288 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:48,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -939732847, now seen corresponding path program 2 times [2023-08-30 07:37:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:48,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214917654] [2023-08-30 07:37:48,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:37:48,290 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 07:37:48,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:48,291 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:48,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:37:48,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:37:48,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:37:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:37:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:48,411 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:48,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:37:48,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:48,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:48,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214917654] [2023-08-30 07:37:48,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214917654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:48,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:48,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:37:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684210475] [2023-08-30 07:37:48,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:48,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:37:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:37:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:37:48,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-08-30 07:37:48,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 443 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:48,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:48,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-08-30 07:37:48,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:49,245 INFO L130 PetriNetUnfolder]: 2414/4632 cut-off events. [2023-08-30 07:37:49,245 INFO L131 PetriNetUnfolder]: For 13305/13305 co-relation queries the response was YES. [2023-08-30 07:37:49,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17573 conditions, 4632 events. 2414/4632 cut-off events. For 13305/13305 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 32367 event pairs, 1026 based on Foata normal form. 54/4686 useless extension candidates. Maximal degree in co-relation 17530. Up to 3133 conditions per place. [2023-08-30 07:37:49,271 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 49 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2023-08-30 07:37:49,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 59 transitions, 589 flow [2023-08-30 07:37:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:37:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:37:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2023-08-30 07:37:49,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421259842519685 [2023-08-30 07:37:49,274 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2023-08-30 07:37:49,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2023-08-30 07:37:49,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:49,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2023-08-30 07:37:49,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:49,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:49,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:49,277 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 443 flow. Second operand 4 states and 428 transitions. [2023-08-30 07:37:49,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 59 transitions, 589 flow [2023-08-30 07:37:49,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 59 transitions, 585 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 07:37:49,323 INFO L231 Difference]: Finished difference. Result has 83 places, 51 transitions, 470 flow [2023-08-30 07:37:49,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=470, PETRI_PLACES=83, PETRI_TRANSITIONS=51} [2023-08-30 07:37:49,324 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-08-30 07:37:49,324 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 51 transitions, 470 flow [2023-08-30 07:37:49,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:49,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:49,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:37:49,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:49,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:49,533 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:49,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:49,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1102980900, now seen corresponding path program 1 times [2023-08-30 07:37:49,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:49,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724926903] [2023-08-30 07:37:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:49,534 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 07:37:49,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:49,535 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:49,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:37:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:37:49,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:49,667 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:49,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:37:49,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:37:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:37:50,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:50,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724926903] [2023-08-30 07:37:50,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724926903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:37:50,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:37:50,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:37:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898221843] [2023-08-30 07:37:50,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:37:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:37:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:37:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:37:52,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 254 [2023-08-30 07:37:52,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 51 transitions, 470 flow. Second operand has 11 states, 11 states have (on average 95.81818181818181) internal successors, (1054), 11 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:52,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:52,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 254 [2023-08-30 07:37:52,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:56,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:56,984 INFO L130 PetriNetUnfolder]: 2354/4530 cut-off events. [2023-08-30 07:37:56,984 INFO L131 PetriNetUnfolder]: For 15935/15935 co-relation queries the response was YES. [2023-08-30 07:37:56,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17821 conditions, 4530 events. 2354/4530 cut-off events. For 15935/15935 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 32064 event pairs, 1668 based on Foata normal form. 20/4550 useless extension candidates. Maximal degree in co-relation 17775. Up to 4296 conditions per place. [2023-08-30 07:37:57,010 INFO L137 encePairwiseOnDemand]: 247/254 looper letters, 99 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2023-08-30 07:37:57,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 949 flow [2023-08-30 07:37:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:37:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:37:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1116 transitions. [2023-08-30 07:37:57,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994273443092341 [2023-08-30 07:37:57,015 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1116 transitions. [2023-08-30 07:37:57,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1116 transitions. [2023-08-30 07:37:57,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:57,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1116 transitions. [2023-08-30 07:37:57,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.45454545454545) internal successors, (1116), 11 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:57,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:57,023 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 254.0) internal successors, (3048), 12 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:57,023 INFO L175 Difference]: Start difference. First operand has 83 places, 51 transitions, 470 flow. Second operand 11 states and 1116 transitions. [2023-08-30 07:37:57,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 949 flow [2023-08-30 07:37:57,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 920 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 07:37:57,069 INFO L231 Difference]: Finished difference. Result has 95 places, 59 transitions, 600 flow [2023-08-30 07:37:57,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=600, PETRI_PLACES=95, PETRI_TRANSITIONS=59} [2023-08-30 07:37:57,070 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 61 predicate places. [2023-08-30 07:37:57,070 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 59 transitions, 600 flow [2023-08-30 07:37:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 95.81818181818181) internal successors, (1054), 11 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:57,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:57,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:37:57,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:57,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:57,281 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:57,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:57,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1464220627, now seen corresponding path program 2 times [2023-08-30 07:37:57,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:57,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89662622] [2023-08-30 07:37:57,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:37:57,282 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 07:37:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:57,283 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:57,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 07:37:57,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:37:57,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:37:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:37:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:57,437 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:57,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:37:57,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:57,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:57,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89662622] [2023-08-30 07:37:57,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89662622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:57,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:57,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:37:57,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079951643] [2023-08-30 07:37:57,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:57,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:37:57,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:57,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:37:57,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:37:57,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 254 [2023-08-30 07:37:57,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 59 transitions, 600 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:57,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:57,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 254 [2023-08-30 07:37:57,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:58,155 INFO L130 PetriNetUnfolder]: 1854/3672 cut-off events. [2023-08-30 07:37:58,155 INFO L131 PetriNetUnfolder]: For 13461/13461 co-relation queries the response was YES. [2023-08-30 07:37:58,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12915 conditions, 3672 events. 1854/3672 cut-off events. For 13461/13461 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 25949 event pairs, 1376 based on Foata normal form. 322/3994 useless extension candidates. Maximal degree in co-relation 12864. Up to 3659 conditions per place. [2023-08-30 07:37:58,179 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 50 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-08-30 07:37:58,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 57 transitions, 680 flow [2023-08-30 07:37:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:37:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:37:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2023-08-30 07:37:58,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41141732283464566 [2023-08-30 07:37:58,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 418 transitions. [2023-08-30 07:37:58,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 418 transitions. [2023-08-30 07:37:58,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:58,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 418 transitions. [2023-08-30 07:37:58,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,186 INFO L175 Difference]: Start difference. First operand has 95 places, 59 transitions, 600 flow. Second operand 4 states and 418 transitions. [2023-08-30 07:37:58,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 57 transitions, 680 flow [2023-08-30 07:37:58,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 57 transitions, 604 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-08-30 07:37:58,238 INFO L231 Difference]: Finished difference. Result has 86 places, 57 transitions, 504 flow [2023-08-30 07:37:58,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=504, PETRI_PLACES=86, PETRI_TRANSITIONS=57} [2023-08-30 07:37:58,239 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-08-30 07:37:58,239 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 57 transitions, 504 flow [2023-08-30 07:37:58,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:58,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:37:58,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:58,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:58,449 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:58,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:58,449 INFO L85 PathProgramCache]: Analyzing trace with hash -243629907, now seen corresponding path program 1 times [2023-08-30 07:37:58,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:58,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045849320] [2023-08-30 07:37:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:37:58,450 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 07:37:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:58,451 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:58,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:37:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:37:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:37:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:58,529 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 07:37:58,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:37:58,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:37:58,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045849320] [2023-08-30 07:37:58,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045849320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:37:58,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:37:58,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:37:58,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89914103] [2023-08-30 07:37:58,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:37:58,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:37:58,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:37:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:37:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:37:58,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 254 [2023-08-30 07:37:58,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 57 transitions, 504 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:37:58,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 254 [2023-08-30 07:37:58,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:37:58,938 INFO L130 PetriNetUnfolder]: 1854/3629 cut-off events. [2023-08-30 07:37:58,938 INFO L131 PetriNetUnfolder]: For 5992/5992 co-relation queries the response was YES. [2023-08-30 07:37:58,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11698 conditions, 3629 events. 1854/3629 cut-off events. For 5992/5992 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24928 event pairs, 820 based on Foata normal form. 43/3672 useless extension candidates. Maximal degree in co-relation 11654. Up to 2275 conditions per place. [2023-08-30 07:37:58,954 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 55 selfloop transitions, 6 changer transitions 3/64 dead transitions. [2023-08-30 07:37:58,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 64 transitions, 660 flow [2023-08-30 07:37:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:37:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:37:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-30 07:37:58,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540682414698163 [2023-08-30 07:37:58,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-30 07:37:58,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-30 07:37:58,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:37:58,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-30 07:37:58,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,959 INFO L175 Difference]: Start difference. First operand has 86 places, 57 transitions, 504 flow. Second operand 3 states and 346 transitions. [2023-08-30 07:37:58,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 64 transitions, 660 flow [2023-08-30 07:37:58,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 64 transitions, 628 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 07:37:58,981 INFO L231 Difference]: Finished difference. Result has 86 places, 56 transitions, 484 flow [2023-08-30 07:37:58,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=86, PETRI_TRANSITIONS=56} [2023-08-30 07:37:58,982 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-08-30 07:37:58,982 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 56 transitions, 484 flow [2023-08-30 07:37:58,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:37:58,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:37:58,983 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:37:58,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:37:59,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:37:59,192 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:37:59,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:37:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1369374, now seen corresponding path program 3 times [2023-08-30 07:37:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:37:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547638060] [2023-08-30 07:37:59,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:37:59,193 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 07:37:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:37:59,194 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:37:59,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:37:59,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:37:59,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:37:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:37:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:37:59,381 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:37:59,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:37:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:37:59,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:38:01,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547638060] [2023-08-30 07:38:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547638060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:01,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:38:01,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307198412] [2023-08-30 07:38:01,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:01,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:38:01,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:38:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:38:10,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 254 [2023-08-30 07:38:10,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 56 transitions, 484 flow. Second operand has 24 states, 24 states have (on average 100.0) internal successors, (2400), 24 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:10,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:10,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 254 [2023-08-30 07:38:10,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:23,335 INFO L130 PetriNetUnfolder]: 4377/8522 cut-off events. [2023-08-30 07:38:23,336 INFO L131 PetriNetUnfolder]: For 13757/13757 co-relation queries the response was YES. [2023-08-30 07:38:23,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27614 conditions, 8522 events. 4377/8522 cut-off events. For 13757/13757 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 62600 event pairs, 3227 based on Foata normal form. 12/8534 useless extension candidates. Maximal degree in co-relation 27570. Up to 1749 conditions per place. [2023-08-30 07:38:23,370 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 666 selfloop transitions, 24 changer transitions 0/690 dead transitions. [2023-08-30 07:38:23,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 690 transitions, 6336 flow [2023-08-30 07:38:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:38:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:38:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2687 transitions. [2023-08-30 07:38:23,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407808398950131 [2023-08-30 07:38:23,377 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2687 transitions. [2023-08-30 07:38:23,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2687 transitions. [2023-08-30 07:38:23,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:23,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2687 transitions. [2023-08-30 07:38:23,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 111.95833333333333) internal successors, (2687), 24 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:23,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:23,392 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:23,392 INFO L175 Difference]: Start difference. First operand has 86 places, 56 transitions, 484 flow. Second operand 24 states and 2687 transitions. [2023-08-30 07:38:23,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 690 transitions, 6336 flow [2023-08-30 07:38:23,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 690 transitions, 6132 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 07:38:23,484 INFO L231 Difference]: Finished difference. Result has 117 places, 69 transitions, 658 flow [2023-08-30 07:38:23,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=658, PETRI_PLACES=117, PETRI_TRANSITIONS=69} [2023-08-30 07:38:23,485 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 83 predicate places. [2023-08-30 07:38:23,485 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 69 transitions, 658 flow [2023-08-30 07:38:23,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.0) internal successors, (2400), 24 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:23,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:38:23,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:38:23,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:38:23,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:38:23,701 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:38:23,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:38:23,702 INFO L85 PathProgramCache]: Analyzing trace with hash -525367571, now seen corresponding path program 1 times [2023-08-30 07:38:23,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:38:23,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710055154] [2023-08-30 07:38:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:38:23,702 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 07:38:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:38:23,703 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:38:23,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:38:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:38:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:38:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:38:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:23,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:23,986 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-08-30 07:38:23,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2023-08-30 07:38:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:24,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:24,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710055154] [2023-08-30 07:38:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710055154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:24,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:24,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2023-08-30 07:38:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900058339] [2023-08-30 07:38:24,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:24,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:38:24,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:38:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:38:24,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 254 [2023-08-30 07:38:24,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 69 transitions, 658 flow. Second operand has 8 states, 8 states have (on average 101.125) internal successors, (809), 8 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:24,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:24,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 254 [2023-08-30 07:38:24,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:25,802 INFO L130 PetriNetUnfolder]: 7368/14080 cut-off events. [2023-08-30 07:38:25,802 INFO L131 PetriNetUnfolder]: For 18745/18745 co-relation queries the response was YES. [2023-08-30 07:38:25,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44769 conditions, 14080 events. 7368/14080 cut-off events. For 18745/18745 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 111365 event pairs, 1163 based on Foata normal form. 104/14184 useless extension candidates. Maximal degree in co-relation 44713. Up to 5797 conditions per place. [2023-08-30 07:38:25,867 INFO L137 encePairwiseOnDemand]: 249/254 looper letters, 84 selfloop transitions, 19 changer transitions 9/112 dead transitions. [2023-08-30 07:38:25,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 112 transitions, 1141 flow [2023-08-30 07:38:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:38:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:38:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 533 transitions. [2023-08-30 07:38:25,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196850393700787 [2023-08-30 07:38:25,870 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 533 transitions. [2023-08-30 07:38:25,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 533 transitions. [2023-08-30 07:38:25,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:25,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 533 transitions. [2023-08-30 07:38:25,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:25,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:25,873 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:25,873 INFO L175 Difference]: Start difference. First operand has 117 places, 69 transitions, 658 flow. Second operand 5 states and 533 transitions. [2023-08-30 07:38:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 112 transitions, 1141 flow [2023-08-30 07:38:26,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 112 transitions, 1093 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 07:38:26,020 INFO L231 Difference]: Finished difference. Result has 113 places, 80 transitions, 779 flow [2023-08-30 07:38:26,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=779, PETRI_PLACES=113, PETRI_TRANSITIONS=80} [2023-08-30 07:38:26,020 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 79 predicate places. [2023-08-30 07:38:26,020 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 80 transitions, 779 flow [2023-08-30 07:38:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.125) internal successors, (809), 8 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:26,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:38:26,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:38:26,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:38:26,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:38:26,228 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:38:26,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:38:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash 763043619, now seen corresponding path program 2 times [2023-08-30 07:38:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:38:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024184519] [2023-08-30 07:38:26,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:38:26,229 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 07:38:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:38:26,229 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:38:26,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:38:26,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:38:26,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:38:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:38:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:38:26,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 07:38:26,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 07:38:26,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 07:38:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:26,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:26,910 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-30 07:38:26,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 490 treesize of output 413 [2023-08-30 07:38:27,006 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-30 07:38:27,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 104 [2023-08-30 07:38:27,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:38:27,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 28 [2023-08-30 07:38:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:27,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:27,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024184519] [2023-08-30 07:38:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024184519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:27,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:27,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 07:38:27,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372365007] [2023-08-30 07:38:27,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:27,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:38:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:27,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:38:27,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=80, Unknown=2, NotChecked=0, Total=110 [2023-08-30 07:38:28,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 254 [2023-08-30 07:38:28,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 80 transitions, 779 flow. Second operand has 11 states, 11 states have (on average 89.45454545454545) internal successors, (984), 11 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:28,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:28,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 254 [2023-08-30 07:38:28,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:30,461 INFO L130 PetriNetUnfolder]: 7368/13976 cut-off events. [2023-08-30 07:38:30,461 INFO L131 PetriNetUnfolder]: For 26113/26113 co-relation queries the response was YES. [2023-08-30 07:38:30,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48420 conditions, 13976 events. 7368/13976 cut-off events. For 26113/26113 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 109408 event pairs, 1868 based on Foata normal form. 104/14080 useless extension candidates. Maximal degree in co-relation 48361. Up to 5756 conditions per place. [2023-08-30 07:38:30,519 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 70 selfloop transitions, 23 changer transitions 9/102 dead transitions. [2023-08-30 07:38:30,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 102 transitions, 1061 flow [2023-08-30 07:38:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:38:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:38:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 477 transitions. [2023-08-30 07:38:30,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37559055118110235 [2023-08-30 07:38:30,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 477 transitions. [2023-08-30 07:38:30,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 477 transitions. [2023-08-30 07:38:30,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:30,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 477 transitions. [2023-08-30 07:38:30,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:30,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:30,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:30,525 INFO L175 Difference]: Start difference. First operand has 113 places, 80 transitions, 779 flow. Second operand 5 states and 477 transitions. [2023-08-30 07:38:30,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 102 transitions, 1061 flow [2023-08-30 07:38:30,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 102 transitions, 1047 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:38:30,702 INFO L231 Difference]: Finished difference. Result has 116 places, 80 transitions, 833 flow [2023-08-30 07:38:30,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=833, PETRI_PLACES=116, PETRI_TRANSITIONS=80} [2023-08-30 07:38:30,703 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 82 predicate places. [2023-08-30 07:38:30,703 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 80 transitions, 833 flow [2023-08-30 07:38:30,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 89.45454545454545) internal successors, (984), 11 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:30,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:38:30,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:38:30,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:38:30,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:38:30,914 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:38:30,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:38:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash -428624670, now seen corresponding path program 3 times [2023-08-30 07:38:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:38:30,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843674203] [2023-08-30 07:38:30,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:38:30,914 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 07:38:30,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:38:30,915 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:38:30,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:38:31,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:38:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:38:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:38:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:38:31,092 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:38:31,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:38:31,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 07:38:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:31,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:31,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843674203] [2023-08-30 07:38:31,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843674203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:31,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:31,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-08-30 07:38:31,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958759314] [2023-08-30 07:38:31,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:31,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:38:31,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:38:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:38:32,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 254 [2023-08-30 07:38:32,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 80 transitions, 833 flow. Second operand has 11 states, 11 states have (on average 96.45454545454545) internal successors, (1061), 11 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:32,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:32,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 254 [2023-08-30 07:38:32,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:33,889 INFO L130 PetriNetUnfolder]: 7196/13656 cut-off events. [2023-08-30 07:38:33,889 INFO L131 PetriNetUnfolder]: For 40134/40134 co-relation queries the response was YES. [2023-08-30 07:38:33,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49361 conditions, 13656 events. 7196/13656 cut-off events. For 40134/40134 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 105862 event pairs, 5098 based on Foata normal form. 8/13664 useless extension candidates. Maximal degree in co-relation 49301. Up to 13524 conditions per place. [2023-08-30 07:38:33,952 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 66 selfloop transitions, 4 changer transitions 27/97 dead transitions. [2023-08-30 07:38:33,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 97 transitions, 1000 flow [2023-08-30 07:38:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:38:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:38:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 797 transitions. [2023-08-30 07:38:33,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922244094488189 [2023-08-30 07:38:33,955 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 797 transitions. [2023-08-30 07:38:33,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 797 transitions. [2023-08-30 07:38:33,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:33,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 797 transitions. [2023-08-30 07:38:33,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 99.625) internal successors, (797), 8 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:33,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:33,959 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 254.0) internal successors, (2286), 9 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:33,959 INFO L175 Difference]: Start difference. First operand has 116 places, 80 transitions, 833 flow. Second operand 8 states and 797 transitions. [2023-08-30 07:38:33,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 97 transitions, 1000 flow [2023-08-30 07:38:34,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 97 transitions, 944 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 07:38:34,167 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 640 flow [2023-08-30 07:38:34,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=640, PETRI_PLACES=114, PETRI_TRANSITIONS=70} [2023-08-30 07:38:34,168 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 80 predicate places. [2023-08-30 07:38:34,168 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 640 flow [2023-08-30 07:38:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 96.45454545454545) internal successors, (1061), 11 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:34,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:38:34,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:38:34,177 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 (23)] Ended with exit code 0 [2023-08-30 07:38:34,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:38:34,371 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:38:34,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:38:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1744550133, now seen corresponding path program 4 times [2023-08-30 07:38:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:38:34,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332076883] [2023-08-30 07:38:34,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:38:34,371 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 07:38:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:38:34,372 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:38:34,373 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 (24)] Waiting until timeout for monitored process [2023-08-30 07:38:34,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:38:34,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:38:34,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:38:34,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:38:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:34,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:34,815 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2023-08-30 07:38:34,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2023-08-30 07:38:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:38:34,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332076883] [2023-08-30 07:38:34,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332076883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:34,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:34,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2023-08-30 07:38:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479834887] [2023-08-30 07:38:34,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:34,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 07:38:34,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:34,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 07:38:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-30 07:38:35,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-08-30 07:38:35,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 640 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:35,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:35,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-08-30 07:38:35,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:37,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:39,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:42,350 INFO L130 PetriNetUnfolder]: 10782/20186 cut-off events. [2023-08-30 07:38:42,351 INFO L131 PetriNetUnfolder]: For 35539/35539 co-relation queries the response was YES. [2023-08-30 07:38:42,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68037 conditions, 20186 events. 10782/20186 cut-off events. For 35539/35539 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 166619 event pairs, 940 based on Foata normal form. 20/20206 useless extension candidates. Maximal degree in co-relation 67980. Up to 4801 conditions per place. [2023-08-30 07:38:42,456 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 128 selfloop transitions, 38 changer transitions 34/200 dead transitions. [2023-08-30 07:38:42,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 200 transitions, 1567 flow [2023-08-30 07:38:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 07:38:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 07:38:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1874 transitions. [2023-08-30 07:38:42,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098862642169729 [2023-08-30 07:38:42,459 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1874 transitions. [2023-08-30 07:38:42,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1874 transitions. [2023-08-30 07:38:42,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:42,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1874 transitions. [2023-08-30 07:38:42,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.11111111111111) internal successors, (1874), 18 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:42,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 254.0) internal successors, (4826), 19 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:42,466 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 254.0) internal successors, (4826), 19 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:42,466 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 640 flow. Second operand 18 states and 1874 transitions. [2023-08-30 07:38:42,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 200 transitions, 1567 flow [2023-08-30 07:38:42,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 200 transitions, 1546 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-30 07:38:42,952 INFO L231 Difference]: Finished difference. Result has 121 places, 85 transitions, 865 flow [2023-08-30 07:38:42,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=865, PETRI_PLACES=121, PETRI_TRANSITIONS=85} [2023-08-30 07:38:42,953 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 87 predicate places. [2023-08-30 07:38:42,953 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 85 transitions, 865 flow [2023-08-30 07:38:42,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:42,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:38:42,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:38:42,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:38:43,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:38:43,154 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:38:43,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:38:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1277513211, now seen corresponding path program 5 times [2023-08-30 07:38:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:38:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892260810] [2023-08-30 07:38:43,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:38:43,155 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 07:38:43,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:38:43,156 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:38:43,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:38:43,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:38:43,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:38:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:38:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:38:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:43,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:43,566 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-08-30 07:38:43,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2023-08-30 07:38:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 07:38:43,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:43,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892260810] [2023-08-30 07:38:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892260810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:43,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:43,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2023-08-30 07:38:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706879192] [2023-08-30 07:38:43,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:43,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:38:43,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:38:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:38:43,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-08-30 07:38:43,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 85 transitions, 865 flow. Second operand has 12 states, 12 states have (on average 98.41666666666667) internal successors, (1181), 12 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:43,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:43,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-08-30 07:38:43,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:46,850 INFO L130 PetriNetUnfolder]: 10782/20106 cut-off events. [2023-08-30 07:38:46,850 INFO L131 PetriNetUnfolder]: For 50358/50358 co-relation queries the response was YES. [2023-08-30 07:38:46,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72215 conditions, 20106 events. 10782/20106 cut-off events. For 50358/50358 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 164725 event pairs, 1020 based on Foata normal form. 80/20186 useless extension candidates. Maximal degree in co-relation 72159. Up to 6020 conditions per place. [2023-08-30 07:38:46,953 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 88 selfloop transitions, 34 changer transitions 53/175 dead transitions. [2023-08-30 07:38:46,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 1473 flow [2023-08-30 07:38:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:38:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:38:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1663 transitions. [2023-08-30 07:38:46,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092027559055118 [2023-08-30 07:38:46,956 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1663 transitions. [2023-08-30 07:38:46,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1663 transitions. [2023-08-30 07:38:46,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:46,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1663 transitions. [2023-08-30 07:38:46,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 103.9375) internal successors, (1663), 16 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:46,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:46,963 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:46,963 INFO L175 Difference]: Start difference. First operand has 121 places, 85 transitions, 865 flow. Second operand 16 states and 1663 transitions. [2023-08-30 07:38:46,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 1473 flow [2023-08-30 07:38:47,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 1381 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-08-30 07:38:47,683 INFO L231 Difference]: Finished difference. Result has 132 places, 85 transitions, 881 flow [2023-08-30 07:38:47,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=881, PETRI_PLACES=132, PETRI_TRANSITIONS=85} [2023-08-30 07:38:47,684 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 98 predicate places. [2023-08-30 07:38:47,684 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 85 transitions, 881 flow [2023-08-30 07:38:47,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.41666666666667) internal successors, (1181), 12 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:47,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:38:47,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:38:47,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 07:38:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:38:47,886 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:38:47,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:38:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2060183985, now seen corresponding path program 6 times [2023-08-30 07:38:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:38:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415498617] [2023-08-30 07:38:47,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:38:47,887 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 07:38:47,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:38:47,889 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:38:47,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 07:38:48,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 07:38:48,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:38:48,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:38:48,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:38:48,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 07:38:48,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 07:38:48,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 07:38:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:38:48,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:48,465 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2023-08-30 07:38:48,871 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-30 07:38:48,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 500 treesize of output 420 [2023-08-30 07:38:48,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:38:48,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 28 [2023-08-30 07:38:48,957 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-30 07:38:48,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 104 [2023-08-30 07:38:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-30 07:38:49,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:49,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415498617] [2023-08-30 07:38:49,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415498617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:49,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:49,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-08-30 07:38:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250640160] [2023-08-30 07:38:49,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:38:49,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:38:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-08-30 07:38:49,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 254 [2023-08-30 07:38:49,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 85 transitions, 881 flow. Second operand has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:49,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:49,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 254 [2023-08-30 07:38:49,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:53,785 INFO L130 PetriNetUnfolder]: 12062/22406 cut-off events. [2023-08-30 07:38:53,785 INFO L131 PetriNetUnfolder]: For 56638/56638 co-relation queries the response was YES. [2023-08-30 07:38:53,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81377 conditions, 22406 events. 12062/22406 cut-off events. For 56638/56638 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 185027 event pairs, 2060 based on Foata normal form. 20/22426 useless extension candidates. Maximal degree in co-relation 81319. Up to 5601 conditions per place. [2023-08-30 07:38:53,907 INFO L137 encePairwiseOnDemand]: 246/254 looper letters, 83 selfloop transitions, 41 changer transitions 32/156 dead transitions. [2023-08-30 07:38:53,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 156 transitions, 1447 flow [2023-08-30 07:38:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 07:38:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 07:38:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1099 transitions. [2023-08-30 07:38:53,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33282858873410054 [2023-08-30 07:38:53,909 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1099 transitions. [2023-08-30 07:38:53,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1099 transitions. [2023-08-30 07:38:53,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:53,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1099 transitions. [2023-08-30 07:38:53,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.53846153846153) internal successors, (1099), 13 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:53,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 254.0) internal successors, (3556), 14 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:53,914 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 254.0) internal successors, (3556), 14 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:53,914 INFO L175 Difference]: Start difference. First operand has 132 places, 85 transitions, 881 flow. Second operand 13 states and 1099 transitions. [2023-08-30 07:38:53,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 156 transitions, 1447 flow [2023-08-30 07:38:54,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 156 transitions, 1379 flow, removed 5 selfloop flow, removed 12 redundant places. [2023-08-30 07:38:54,683 INFO L231 Difference]: Finished difference. Result has 136 places, 93 transitions, 1008 flow [2023-08-30 07:38:54,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1008, PETRI_PLACES=136, PETRI_TRANSITIONS=93} [2023-08-30 07:38:54,683 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 102 predicate places. [2023-08-30 07:38:54,683 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 93 transitions, 1008 flow [2023-08-30 07:38:54,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:54,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:38:54,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:38:54,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 07:38:54,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:38:54,884 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:38:54,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:38:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash -414874438, now seen corresponding path program 7 times [2023-08-30 07:38:54,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:38:54,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622933102] [2023-08-30 07:38:54,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:38:54,885 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 07:38:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:38:54,886 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:38:54,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 07:38:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:38:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:38:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:38:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:38:55,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:38:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:38:55,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:38:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622933102] [2023-08-30 07:38:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622933102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:38:55,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:38:55,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 07:38:55,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281822598] [2023-08-30 07:38:55,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:38:55,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:38:55,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:38:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:38:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:38:55,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-08-30 07:38:55,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 93 transitions, 1008 flow. Second operand has 8 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:55,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:38:55,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-08-30 07:38:55,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:38:59,584 INFO L130 PetriNetUnfolder]: 17502/32926 cut-off events. [2023-08-30 07:38:59,584 INFO L131 PetriNetUnfolder]: For 124698/124698 co-relation queries the response was YES. [2023-08-30 07:38:59,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137401 conditions, 32926 events. 17502/32926 cut-off events. For 124698/124698 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 292595 event pairs, 3720 based on Foata normal form. 480/33406 useless extension candidates. Maximal degree in co-relation 137339. Up to 13521 conditions per place. [2023-08-30 07:38:59,919 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 92 selfloop transitions, 48 changer transitions 1/141 dead transitions. [2023-08-30 07:38:59,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 141 transitions, 1708 flow [2023-08-30 07:38:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:38:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:38:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-08-30 07:38:59,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637795275590551 [2023-08-30 07:38:59,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-08-30 07:38:59,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-08-30 07:38:59,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:38:59,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-08-30 07:38:59,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:59,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:59,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:38:59,925 INFO L175 Difference]: Start difference. First operand has 136 places, 93 transitions, 1008 flow. Second operand 5 states and 589 transitions. [2023-08-30 07:38:59,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 141 transitions, 1708 flow [2023-08-30 07:39:01,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 141 transitions, 1633 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-30 07:39:01,262 INFO L231 Difference]: Finished difference. Result has 134 places, 114 transitions, 1347 flow [2023-08-30 07:39:01,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1347, PETRI_PLACES=134, PETRI_TRANSITIONS=114} [2023-08-30 07:39:01,263 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 100 predicate places. [2023-08-30 07:39:01,263 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 114 transitions, 1347 flow [2023-08-30 07:39:01,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:01,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:39:01,263 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:39:01,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 07:39:01,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:39:01,464 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:39:01,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:39:01,464 INFO L85 PathProgramCache]: Analyzing trace with hash -29306486, now seen corresponding path program 8 times [2023-08-30 07:39:01,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:39:01,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256255612] [2023-08-30 07:39:01,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:39:01,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:39:01,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:39:01,466 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:39:01,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 07:39:01,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:39:01,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:39:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:39:01,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:39:01,690 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:39:01,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:39:01,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 07:39:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:39:01,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:39:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:39:02,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:39:02,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256255612] [2023-08-30 07:39:02,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256255612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:39:02,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:39:02,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-08-30 07:39:02,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401706315] [2023-08-30 07:39:02,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:39:02,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 07:39:02,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:39:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 07:39:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 07:39:04,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 254 [2023-08-30 07:39:04,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 114 transitions, 1347 flow. Second operand has 15 states, 15 states have (on average 96.0) internal successors, (1440), 15 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:04,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:39:04,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 254 [2023-08-30 07:39:04,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:39:11,899 INFO L130 PetriNetUnfolder]: 16818/31699 cut-off events. [2023-08-30 07:39:11,899 INFO L131 PetriNetUnfolder]: For 121614/121614 co-relation queries the response was YES. [2023-08-30 07:39:12,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140843 conditions, 31699 events. 16818/31699 cut-off events. For 121614/121614 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 280335 event pairs, 11340 based on Foata normal form. 48/31747 useless extension candidates. Maximal degree in co-relation 140780. Up to 31278 conditions per place. [2023-08-30 07:39:12,105 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 108 selfloop transitions, 5 changer transitions 59/172 dead transitions. [2023-08-30 07:39:12,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 172 transitions, 2045 flow [2023-08-30 07:39:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:39:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:39:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1201 transitions. [2023-08-30 07:39:12,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940288713910761 [2023-08-30 07:39:12,108 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1201 transitions. [2023-08-30 07:39:12,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1201 transitions. [2023-08-30 07:39:12,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:39:12,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1201 transitions. [2023-08-30 07:39:12,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.08333333333333) internal successors, (1201), 12 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:12,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:12,115 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:12,115 INFO L175 Difference]: Start difference. First operand has 134 places, 114 transitions, 1347 flow. Second operand 12 states and 1201 transitions. [2023-08-30 07:39:12,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 172 transitions, 2045 flow [2023-08-30 07:39:14,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 172 transitions, 2027 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 07:39:14,341 INFO L231 Difference]: Finished difference. Result has 151 places, 113 transitions, 1364 flow [2023-08-30 07:39:14,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1364, PETRI_PLACES=151, PETRI_TRANSITIONS=113} [2023-08-30 07:39:14,341 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 117 predicate places. [2023-08-30 07:39:14,341 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 113 transitions, 1364 flow [2023-08-30 07:39:14,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 96.0) internal successors, (1440), 15 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:14,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:39:14,341 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:39:14,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 07:39:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:39:14,542 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:39:14,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:39:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1072471249, now seen corresponding path program 9 times [2023-08-30 07:39:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:39:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44272251] [2023-08-30 07:39:14,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:39:14,543 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 07:39:14,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:39:14,544 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:39:14,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 07:39:14,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:39:14,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:39:14,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:39:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:39:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:39:14,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:39:15,114 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2023-08-30 07:39:15,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2023-08-30 07:39:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:39:15,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:39:15,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44272251] [2023-08-30 07:39:15,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44272251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:39:15,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:39:15,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2023-08-30 07:39:15,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997127259] [2023-08-30 07:39:15,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:39:15,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 07:39:15,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:39:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 07:39:15,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-08-30 07:39:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-08-30 07:39:15,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 113 transitions, 1364 flow. Second operand has 17 states, 17 states have (on average 98.11764705882354) internal successors, (1668), 17 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:15,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:39:15,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-08-30 07:39:15,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:39:18,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:39:20,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:39:22,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:39:24,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:39:27,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:39:29,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:39:36,059 INFO L130 PetriNetUnfolder]: 24189/45151 cut-off events. [2023-08-30 07:39:36,059 INFO L131 PetriNetUnfolder]: For 143041/143041 co-relation queries the response was YES. [2023-08-30 07:39:36,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190497 conditions, 45151 events. 24189/45151 cut-off events. For 143041/143041 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 414083 event pairs, 1121 based on Foata normal form. 19/45170 useless extension candidates. Maximal degree in co-relation 190426. Up to 18545 conditions per place. [2023-08-30 07:39:36,435 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 197 selfloop transitions, 103 changer transitions 81/381 dead transitions. [2023-08-30 07:39:36,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 381 transitions, 3518 flow [2023-08-30 07:39:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 07:39:36,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 07:39:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3649 transitions. [2023-08-30 07:39:36,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41046119235095613 [2023-08-30 07:39:36,440 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3649 transitions. [2023-08-30 07:39:36,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3649 transitions. [2023-08-30 07:39:36,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:39:36,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3649 transitions. [2023-08-30 07:39:36,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 104.25714285714285) internal successors, (3649), 35 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:36,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 254.0) internal successors, (9144), 36 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:36,450 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 254.0) internal successors, (9144), 36 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:36,450 INFO L175 Difference]: Start difference. First operand has 151 places, 113 transitions, 1364 flow. Second operand 35 states and 3649 transitions. [2023-08-30 07:39:36,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 381 transitions, 3518 flow [2023-08-30 07:39:39,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 381 transitions, 3450 flow, removed 25 selfloop flow, removed 13 redundant places. [2023-08-30 07:39:39,115 INFO L231 Difference]: Finished difference. Result has 167 places, 148 transitions, 1934 flow [2023-08-30 07:39:39,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1934, PETRI_PLACES=167, PETRI_TRANSITIONS=148} [2023-08-30 07:39:39,116 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 133 predicate places. [2023-08-30 07:39:39,116 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 148 transitions, 1934 flow [2023-08-30 07:39:39,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.11764705882354) internal successors, (1668), 17 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:39,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:39:39,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:39:39,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 07:39:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:39:39,318 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:39:39,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:39:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash -548433333, now seen corresponding path program 10 times [2023-08-30 07:39:39,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:39:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075748941] [2023-08-30 07:39:39,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:39:39,318 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 07:39:39,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:39:39,319 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:39:39,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 07:39:39,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:39:39,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:39:39,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 07:39:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:39:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:39:39,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:39:39,763 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-08-30 07:39:39,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2023-08-30 07:39:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 07:39:39,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:39:39,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075748941] [2023-08-30 07:39:39,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075748941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:39:39,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:39:39,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2023-08-30 07:39:39,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585295238] [2023-08-30 07:39:39,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:39:39,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:39:39,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:39:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:39:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-08-30 07:39:40,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-08-30 07:39:40,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 148 transitions, 1934 flow. Second operand has 16 states, 16 states have (on average 98.125) internal successors, (1570), 16 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:40,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:39:40,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-08-30 07:39:40,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:39:49,136 INFO L130 PetriNetUnfolder]: 31067/57767 cut-off events. [2023-08-30 07:39:49,136 INFO L131 PetriNetUnfolder]: For 220519/220519 co-relation queries the response was YES. [2023-08-30 07:39:49,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255502 conditions, 57767 events. 31067/57767 cut-off events. For 220519/220519 co-relation queries the response was YES. Maximal size of possible extension queue 1437. Compared 547426 event pairs, 2755 based on Foata normal form. 152/57919 useless extension candidates. Maximal degree in co-relation 255439. Up to 23789 conditions per place. [2023-08-30 07:39:49,673 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 161 selfloop transitions, 119 changer transitions 71/351 dead transitions. [2023-08-30 07:39:49,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 351 transitions, 3829 flow [2023-08-30 07:39:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 07:39:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 07:39:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2916 transitions. [2023-08-30 07:39:49,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41001124859392574 [2023-08-30 07:39:49,679 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2916 transitions. [2023-08-30 07:39:49,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2916 transitions. [2023-08-30 07:39:49,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:39:49,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2916 transitions. [2023-08-30 07:39:49,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 104.14285714285714) internal successors, (2916), 28 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:49,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 254.0) internal successors, (7366), 29 states have internal predecessors, (7366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:49,687 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 254.0) internal successors, (7366), 29 states have internal predecessors, (7366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:49,687 INFO L175 Difference]: Start difference. First operand has 167 places, 148 transitions, 1934 flow. Second operand 28 states and 2916 transitions. [2023-08-30 07:39:49,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 351 transitions, 3829 flow [2023-08-30 07:39:53,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 351 transitions, 3522 flow, removed 50 selfloop flow, removed 13 redundant places. [2023-08-30 07:39:53,342 INFO L231 Difference]: Finished difference. Result has 190 places, 183 transitions, 2479 flow [2023-08-30 07:39:53,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2479, PETRI_PLACES=190, PETRI_TRANSITIONS=183} [2023-08-30 07:39:53,343 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 156 predicate places. [2023-08-30 07:39:53,343 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 183 transitions, 2479 flow [2023-08-30 07:39:53,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 98.125) internal successors, (1570), 16 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:53,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:39:53,343 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:39:53,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-30 07:39:53,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:39:53,546 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:39:53,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:39:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash -946640447, now seen corresponding path program 11 times [2023-08-30 07:39:53,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:39:53,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768084788] [2023-08-30 07:39:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:39:53,547 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 07:39:53,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:39:53,549 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:39:53,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 07:39:53,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:39:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:39:53,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 07:39:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:39:53,820 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:39:53,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:39:54,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 07:39:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:39:54,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:39:54,462 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2023-08-30 07:39:54,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 103 treesize of output 25 [2023-08-30 07:39:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:39:55,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:39:55,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768084788] [2023-08-30 07:39:55,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768084788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:39:55,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:39:55,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-08-30 07:39:55,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041849646] [2023-08-30 07:39:55,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:39:55,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 07:39:55,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:39:55,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 07:39:55,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-08-30 07:40:00,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 254 [2023-08-30 07:40:00,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 183 transitions, 2479 flow. Second operand has 23 states, 23 states have (on average 91.56521739130434) internal successors, (2106), 23 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:40:00,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:40:00,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 254 [2023-08-30 07:40:00,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:40:30,014 INFO L130 PetriNetUnfolder]: 33791/62841 cut-off events. [2023-08-30 07:40:30,015 INFO L131 PetriNetUnfolder]: For 296149/296149 co-relation queries the response was YES. [2023-08-30 07:40:30,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283454 conditions, 62841 events. 33791/62841 cut-off events. For 296149/296149 co-relation queries the response was YES. Maximal size of possible extension queue 1846. Compared 605197 event pairs, 16733 based on Foata normal form. 64/62905 useless extension candidates. Maximal degree in co-relation 283383. Up to 46585 conditions per place. [2023-08-30 07:40:30,879 INFO L137 encePairwiseOnDemand]: 246/254 looper letters, 329 selfloop transitions, 204 changer transitions 270/803 dead transitions. [2023-08-30 07:40:30,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 803 transitions, 9615 flow [2023-08-30 07:40:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 07:40:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 07:40:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5565 transitions. [2023-08-30 07:40:30,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843762950683796 [2023-08-30 07:40:30,888 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5565 transitions. [2023-08-30 07:40:30,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5565 transitions. [2023-08-30 07:40:30,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:40:30,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5565 transitions. [2023-08-30 07:40:30,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 97.63157894736842) internal successors, (5565), 57 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:40:30,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 254.0) internal successors, (14732), 58 states have internal predecessors, (14732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:40:30,908 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 254.0) internal successors, (14732), 58 states have internal predecessors, (14732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:40:30,908 INFO L175 Difference]: Start difference. First operand has 190 places, 183 transitions, 2479 flow. Second operand 57 states and 5565 transitions. [2023-08-30 07:40:30,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 803 transitions, 9615 flow [2023-08-30 07:40:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 803 transitions, 8958 flow, removed 263 selfloop flow, removed 12 redundant places. [2023-08-30 07:40:36,508 INFO L231 Difference]: Finished difference. Result has 272 places, 360 transitions, 5558 flow [2023-08-30 07:40:36,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=5558, PETRI_PLACES=272, PETRI_TRANSITIONS=360} [2023-08-30 07:40:36,509 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 238 predicate places. [2023-08-30 07:40:36,509 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 360 transitions, 5558 flow [2023-08-30 07:40:36,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.56521739130434) internal successors, (2106), 23 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:40:36,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:40:36,510 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:40:36,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-08-30 07:40:36,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:40:36,710 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:40:36,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:40:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1369334821, now seen corresponding path program 12 times [2023-08-30 07:40:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:40:36,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286071355] [2023-08-30 07:40:36,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:40:36,711 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 07:40:36,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:40:36,712 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:40:36,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 07:40:36,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:40:36,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:40:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:40:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:40:36,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 07:40:37,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 07:40:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:40:37,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:40:37,400 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_797 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_797) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse1)))))) is different from false [2023-08-30 07:40:37,483 INFO L321 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2023-08-30 07:40:37,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 106 [2023-08-30 07:40:37,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:40:37,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2023-08-30 07:40:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-08-30 07:40:37,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:40:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286071355] [2023-08-30 07:40:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286071355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:40:37,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:40:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2023-08-30 07:40:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249620786] [2023-08-30 07:40:37,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:40:37,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 07:40:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:40:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 07:40:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=331, Unknown=1, NotChecked=36, Total=420 [2023-08-30 07:40:37,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 254 [2023-08-30 07:40:37,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 360 transitions, 5558 flow. Second operand has 21 states, 21 states have (on average 78.71428571428571) internal successors, (1653), 21 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:40:37,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:40:37,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 254 [2023-08-30 07:40:37,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:40:40,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:40:43,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:40:45,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:40:45,381 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x~0 (_ bv5 32)) (forall ((v_ArrVal_797 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_797) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse1))))))) is different from false [2023-08-30 07:40:47,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:40:49,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:40:51,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:40:53,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:40:56,005 WARN L539 Checker$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 07:41:12,347 INFO L130 PetriNetUnfolder]: 40935/74773 cut-off events. [2023-08-30 07:41:12,348 INFO L131 PetriNetUnfolder]: For 871845/871845 co-relation queries the response was YES. [2023-08-30 07:41:13,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412703 conditions, 74773 events. 40935/74773 cut-off events. For 871845/871845 co-relation queries the response was YES. Maximal size of possible extension queue 2031. Compared 716598 event pairs, 2818 based on Foata normal form. 19/74792 useless extension candidates. Maximal degree in co-relation 412596. Up to 31229 conditions per place. [2023-08-30 07:41:13,564 INFO L137 encePairwiseOnDemand]: 243/254 looper letters, 226 selfloop transitions, 315 changer transitions 51/592 dead transitions. [2023-08-30 07:41:13,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 592 transitions, 9126 flow [2023-08-30 07:41:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 07:41:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 07:41:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2368 transitions. [2023-08-30 07:41:13,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329583802024747 [2023-08-30 07:41:13,568 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2368 transitions. [2023-08-30 07:41:13,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2368 transitions. [2023-08-30 07:41:13,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:41:13,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2368 transitions. [2023-08-30 07:41:13,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 84.57142857142857) internal successors, (2368), 28 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:41:13,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 254.0) internal successors, (7366), 29 states have internal predecessors, (7366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:41:13,577 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 254.0) internal successors, (7366), 29 states have internal predecessors, (7366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:41:13,578 INFO L175 Difference]: Start difference. First operand has 272 places, 360 transitions, 5558 flow. Second operand 28 states and 2368 transitions. [2023-08-30 07:41:13,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 592 transitions, 9126 flow [2023-08-30 07:41:39,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 592 transitions, 8813 flow, removed 143 selfloop flow, removed 26 redundant places. [2023-08-30 07:41:39,865 INFO L231 Difference]: Finished difference. Result has 264 places, 446 transitions, 7688 flow [2023-08-30 07:41:39,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=5347, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7688, PETRI_PLACES=264, PETRI_TRANSITIONS=446} [2023-08-30 07:41:39,865 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 230 predicate places. [2023-08-30 07:41:39,866 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 446 transitions, 7688 flow [2023-08-30 07:41:39,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 78.71428571428571) internal successors, (1653), 21 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:41:39,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:41:39,866 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:41:39,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 07:41:40,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:41:40,069 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:41:40,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:41:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash -561553336, now seen corresponding path program 13 times [2023-08-30 07:41:40,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:41:40,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385460144] [2023-08-30 07:41:40,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:41:40,070 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 07:41:40,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:41:40,071 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:41:40,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 07:41:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:41:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:41:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:41:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:41:40,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:41:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:41:40,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:41:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385460144] [2023-08-30 07:41:40,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385460144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:41:40,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:41:40,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 07:41:40,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428634421] [2023-08-30 07:41:40,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:41:40,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:41:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:41:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:41:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:41:40,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 254 [2023-08-30 07:41:40,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 446 transitions, 7688 flow. Second operand has 10 states, 10 states have (on average 111.7) internal successors, (1117), 10 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:41:40,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:41:40,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 254 [2023-08-30 07:41:40,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:05,412 INFO L130 PetriNetUnfolder]: 56953/105493 cut-off events. [2023-08-30 07:42:05,412 INFO L131 PetriNetUnfolder]: For 1510790/1510790 co-relation queries the response was YES. [2023-08-30 07:42:06,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797074 conditions, 105493 events. 56953/105493 cut-off events. For 1510790/1510790 co-relation queries the response was YES. Maximal size of possible extension queue 2774. Compared 1081546 event pairs, 9984 based on Foata normal form. 414/105907 useless extension candidates. Maximal degree in co-relation 796980. Up to 57585 conditions per place. [2023-08-30 07:42:07,115 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 209 selfloop transitions, 425 changer transitions 7/641 dead transitions. [2023-08-30 07:42:07,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 641 transitions, 12202 flow [2023-08-30 07:42:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:42:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:42:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2023-08-30 07:42:07,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645669291338583 [2023-08-30 07:42:07,117 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2023-08-30 07:42:07,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2023-08-30 07:42:07,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:07,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2023-08-30 07:42:07,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:07,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:07,119 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:07,119 INFO L175 Difference]: Start difference. First operand has 264 places, 446 transitions, 7688 flow. Second operand 6 states and 708 transitions. [2023-08-30 07:42:07,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 641 transitions, 12202 flow [2023-08-30 07:42:48,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 641 transitions, 11420 flow, removed 229 selfloop flow, removed 12 redundant places. [2023-08-30 07:42:48,927 INFO L231 Difference]: Finished difference. Result has 260 places, 601 transitions, 11482 flow [2023-08-30 07:42:48,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=7001, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11482, PETRI_PLACES=260, PETRI_TRANSITIONS=601} [2023-08-30 07:42:48,928 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 226 predicate places. [2023-08-30 07:42:48,928 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 601 transitions, 11482 flow [2023-08-30 07:42:48,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.7) internal successors, (1117), 10 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:48,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:48,929 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:48,937 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 (33)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:49,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 07:42:49,129 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:42:49,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash 779269800, now seen corresponding path program 14 times [2023-08-30 07:42:49,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:49,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835948169] [2023-08-30 07:42:49,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:42:49,130 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 07:42:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:49,131 INFO L229 MonitoredProcess]: Starting monitored process 34 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 07:42:49,132 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 (34)] Waiting until timeout for monitored process [2023-08-30 07:42:49,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:42:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:42:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 07:42:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:49,369 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:49,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:49,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-08-30 07:42:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:42:49,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:42:50,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835948169] [2023-08-30 07:42:50,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835948169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:50,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:50,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-08-30 07:42:50,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982599469] [2023-08-30 07:42:50,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:50,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 07:42:50,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:50,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 07:42:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-30 07:42:52,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 254 [2023-08-30 07:42:52,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 601 transitions, 11482 flow. Second operand has 19 states, 19 states have (on average 95.78947368421052) internal successors, (1820), 19 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:52,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:52,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 254 [2023-08-30 07:42:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:55,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:42:59,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:43:26,179 INFO L130 PetriNetUnfolder]: 54936/102148 cut-off events. [2023-08-30 07:43:26,179 INFO L131 PetriNetUnfolder]: For 1669148/1669148 co-relation queries the response was YES. [2023-08-30 07:43:27,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797056 conditions, 102148 events. 54936/102148 cut-off events. For 1669148/1669148 co-relation queries the response was YES. Maximal size of possible extension queue 2702. Compared 1052252 event pairs, 33796 based on Foata normal form. 109/102257 useless extension candidates. Maximal degree in co-relation 796960. Up to 101111 conditions per place. [2023-08-30 07:43:27,830 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 409 selfloop transitions, 6 changer transitions 107/522 dead transitions. [2023-08-30 07:43:27,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 522 transitions, 10218 flow [2023-08-30 07:43:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 07:43:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 07:43:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1502 transitions. [2023-08-30 07:43:27,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942257217847769 [2023-08-30 07:43:27,833 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1502 transitions. [2023-08-30 07:43:27,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1502 transitions. [2023-08-30 07:43:27,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:43:27,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1502 transitions. [2023-08-30 07:43:27,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 100.13333333333334) internal successors, (1502), 15 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:27,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 254.0) internal successors, (4064), 16 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:27,839 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 254.0) internal successors, (4064), 16 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:27,839 INFO L175 Difference]: Start difference. First operand has 260 places, 601 transitions, 11482 flow. Second operand 15 states and 1502 transitions. [2023-08-30 07:43:27,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 522 transitions, 10218 flow [2023-08-30 07:45:34,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 522 transitions, 9527 flow, removed 125 selfloop flow, removed 8 redundant places. [2023-08-30 07:45:34,985 INFO L231 Difference]: Finished difference. Result has 266 places, 415 transitions, 7183 flow [2023-08-30 07:45:34,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7183, PETRI_PLACES=266, PETRI_TRANSITIONS=415} [2023-08-30 07:45:34,986 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 232 predicate places. [2023-08-30 07:45:34,986 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 415 transitions, 7183 flow [2023-08-30 07:45:34,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.78947368421052) internal successors, (1820), 19 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:34,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:34,986 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:34,995 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 (34)] Forceful destruction successful, exit code 0 [2023-08-30 07:45:35,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 07:45:35,187 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:45:35,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:35,187 INFO L85 PathProgramCache]: Analyzing trace with hash -219485081, now seen corresponding path program 15 times [2023-08-30 07:45:35,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:35,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800629741] [2023-08-30 07:45:35,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:45:35,188 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 07:45:35,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:35,189 INFO L229 MonitoredProcess]: Starting monitored process 35 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 07:45:35,196 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 (35)] Waiting until timeout for monitored process [2023-08-30 07:45:35,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:45:35,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:45:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:45:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:45:35,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:45:36,018 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2023-08-30 07:45:36,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2023-08-30 07:45:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:45:36,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:36,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800629741] [2023-08-30 07:45:36,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800629741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:45:36,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:45:36,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2023-08-30 07:45:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969388209] [2023-08-30 07:45:36,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:45:36,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 07:45:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 07:45:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-08-30 07:45:37,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 254 [2023-08-30 07:45:37,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 415 transitions, 7183 flow. Second operand has 23 states, 23 states have (on average 97.82608695652173) internal successors, (2250), 23 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:37,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:37,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 254 [2023-08-30 07:45:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:40,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:45:43,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:45:45,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:45:48,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:45:50,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:45:52,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:45:54,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:45:56,768 WARN L539 Checker$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 07:45:58,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:46:00,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:46:03,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:46:05,168 WARN L539 Checker$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 07:46:07,296 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 07:46:38,116 INFO L130 PetriNetUnfolder]: 68148/126161 cut-off events. [2023-08-30 07:46:38,116 INFO L131 PetriNetUnfolder]: For 1195075/1195075 co-relation queries the response was YES. [2023-08-30 07:46:39,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861470 conditions, 126161 events. 68148/126161 cut-off events. For 1195075/1195075 co-relation queries the response was YES. Maximal size of possible extension queue 3381. Compared 1323151 event pairs, 3838 based on Foata normal form. 17/126178 useless extension candidates. Maximal degree in co-relation 861376. Up to 70961 conditions per place. [2023-08-30 07:46:40,219 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 321 selfloop transitions, 441 changer transitions 151/913 dead transitions. [2023-08-30 07:46:40,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 913 transitions, 13832 flow [2023-08-30 07:46:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-30 07:46:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-30 07:46:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 6555 transitions. [2023-08-30 07:46:40,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096362954630671 [2023-08-30 07:46:40,226 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 6555 transitions. [2023-08-30 07:46:40,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 6555 transitions. [2023-08-30 07:46:40,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:46:40,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 6555 transitions. [2023-08-30 07:46:40,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 104.04761904761905) internal successors, (6555), 63 states have internal predecessors, (6555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:40,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 254.0) internal successors, (16256), 64 states have internal predecessors, (16256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:40,245 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 254.0) internal successors, (16256), 64 states have internal predecessors, (16256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:46:40,245 INFO L175 Difference]: Start difference. First operand has 266 places, 415 transitions, 7183 flow. Second operand 63 states and 6555 transitions. [2023-08-30 07:46:40,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 913 transitions, 13832 flow