./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-commit-1.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/popl20-commit-1.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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:16:23,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:16:23,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:16:23,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:16:23,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:16:23,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:16:23,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:16:23,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:16:23,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:16:23,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:16:23,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:16:23,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:16:23,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:16:23,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:16:23,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:16:23,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:16:23,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:16:23,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:16:23,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:16:23,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:16:23,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:16:23,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:16:23,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:16:23,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:16:23,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:16:23,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:16:23,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:16:23,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:16:23,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:16:23,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:16:23,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:16:23,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:16:23,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:16:23,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:16:23,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:16:23,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:16:23,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:16:23,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:16:23,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:16:23,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:16:23,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:16:23,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:16:23,162 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:16:23,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:16:23,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:16:23,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:16:23,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:16:23,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:16:23,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:16:23,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:16:23,166 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:16:23,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:16:23,167 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:16:23,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:16:23,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:16:23,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:16:23,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:16:23,168 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:16:23,168 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:16:23,169 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:16:23,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:16:23,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:16:23,169 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:16:23,169 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:16:23,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:16:23,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:16:23,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:16:23,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:16:23,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:16:23,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:16:23,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:16:23,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:16:23,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:16:23,171 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:16:23,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:16:23,172 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:16:23,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:16:23,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:16:23,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:16:23,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:16:23,506 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:16:23,506 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:16:23,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-30 06:16:24,798 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:16:25,030 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:16:25,030 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-30 06:16:25,043 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1539e4be5/7301480418554232b6e8db19a53be9d3/FLAG774f29333 [2023-08-30 06:16:25,068 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1539e4be5/7301480418554232b6e8db19a53be9d3 [2023-08-30 06:16:25,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:16:25,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:16:25,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:16:25,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:16:25,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:16:25,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:25" (1/1) ... [2023-08-30 06:16:25,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a07f3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:25, skipping insertion in model container [2023-08-30 06:16:25,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:25" (1/1) ... [2023-08-30 06:16:25,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:16:25,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:16:25,289 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-30 06:16:25,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:16:25,311 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:16:25,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e5d5723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:25, skipping insertion in model container [2023-08-30 06:16:25,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:16:25,312 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:16:25,313 INFO L158 Benchmark]: Toolchain (without parser) took 239.54ms. Allocated memory is still 83.9MB. Free memory was 62.0MB in the beginning and 51.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:16:25,314 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 45.5MB in the end (delta: 58.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:16:25,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.28ms. Allocated memory is still 83.9MB. Free memory was 61.9MB in the beginning and 51.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:16:25,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 45.5MB in the end (delta: 58.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.28ms. Allocated memory is still 83.9MB. Free memory was 61.9MB in the beginning and 51.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-commit-1.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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:16:27,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:16:27,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:16:27,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:16:27,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:16:27,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:16:27,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:16:27,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:16:27,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:16:27,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:16:27,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:16:27,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:16:27,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:16:27,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:16:27,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:16:27,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:16:27,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:16:27,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:16:27,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:16:27,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:16:27,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:16:27,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:16:27,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:16:27,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:16:27,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:16:27,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:16:27,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:16:27,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:16:27,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:16:27,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:16:27,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:16:27,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:16:27,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:16:27,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:16:27,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:16:27,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:16:27,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:16:27,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:16:27,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:16:27,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:16:27,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:16:27,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:16:27,257 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:16:27,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:16:27,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:16:27,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:16:27,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:16:27,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:16:27,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:16:27,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:16:27,261 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:16:27,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:16:27,262 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:16:27,263 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:16:27,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:16:27,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:16:27,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:16:27,264 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:16:27,264 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:16:27,264 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:16:27,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:16:27,264 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:16:27,265 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:16:27,265 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:16:27,265 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:16:27,265 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:16:27,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:16:27,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:16:27,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:16:27,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:16:27,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:16:27,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:16:27,267 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:16:27,267 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:16:27,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:16:27,267 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:16:27,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:16:27,268 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:16:27,268 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:16:27,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:16:27,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:16:27,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:16:27,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:16:27,604 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:16:27,605 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:16:27,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-30 06:16:28,881 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:16:29,077 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:16:29,078 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-08-30 06:16:29,084 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7223cdc/cbbfaa8a9c96410792b23b5ede780786/FLAGaeb7237d2 [2023-08-30 06:16:29,094 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7223cdc/cbbfaa8a9c96410792b23b5ede780786 [2023-08-30 06:16:29,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:16:29,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:16:29,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:16:29,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:16:29,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:16:29,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69b34813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29, skipping insertion in model container [2023-08-30 06:16:29,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:16:29,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:16:29,273 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-30 06:16:29,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:16:29,305 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:16:29,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:16:29,343 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-30 06:16:29,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:16:29,373 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:16:29,415 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-08-30 06:16:29,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:16:29,437 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:16:29,439 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:16:29,444 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:16:29,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29 WrapperNode [2023-08-30 06:16:29,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:16:29,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:16:29,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:16:29,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:16:29,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,520 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 336 [2023-08-30 06:16:29,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:16:29,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:16:29,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:16:29,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:16:29,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:16:29,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:16:29,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:16:29,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:16:29,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2023-08-30 06:16:29,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:16:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:16:29,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:16:29,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:16:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:16:29,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:16:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:16:29,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:16:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:16:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:16:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:16:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:16:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:16:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:16:29,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:16:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:16:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:16:29,679 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:16:29,807 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:16:29,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:16:30,588 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:16:30,859 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:16:30,860 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 06:16:30,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:30 BoogieIcfgContainer [2023-08-30 06:16:30,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:16:30,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:16:30,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:16:30,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:16:30,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:16:29" (1/3) ... [2023-08-30 06:16:30,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225cfca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:30, skipping insertion in model container [2023-08-30 06:16:30,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (2/3) ... [2023-08-30 06:16:30,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225cfca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:30, skipping insertion in model container [2023-08-30 06:16:30,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:30" (3/3) ... [2023-08-30 06:16:30,871 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2023-08-30 06:16:30,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:16:30,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-30 06:16:30,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:16:31,000 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:16:31,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 275 transitions, 574 flow [2023-08-30 06:16:31,180 INFO L130 PetriNetUnfolder]: 19/272 cut-off events. [2023-08-30 06:16:31,181 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:16:31,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 272 events. 19/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-08-30 06:16:31,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 275 transitions, 574 flow [2023-08-30 06:16:31,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 268 transitions, 554 flow [2023-08-30 06:16:31,199 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:16:31,208 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 268 transitions, 554 flow [2023-08-30 06:16:31,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 268 transitions, 554 flow [2023-08-30 06:16:31,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 268 transitions, 554 flow [2023-08-30 06:16:31,301 INFO L130 PetriNetUnfolder]: 19/268 cut-off events. [2023-08-30 06:16:31,306 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:16:31,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 19/268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 278 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-08-30 06:16:31,323 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-08-30 06:17:00,593 INFO L134 LiptonReduction]: Checked pairs total: 10449 [2023-08-30 06:17:00,594 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-30 06:17:00,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:17:00,622 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;@707b43e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:17:00,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-08-30 06:17:00,626 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:17:00,627 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:17:00,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:00,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:17:00,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:00,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash 43202, now seen corresponding path program 1 times [2023-08-30 06:17:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562892851] [2023-08-30 06:17:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:00,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:00,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:00,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:17:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:00,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:17:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:00,923 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:17:00,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:17:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:00,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:17:00,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562892851] [2023-08-30 06:17:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562892851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:17:00,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:17:00,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:17:00,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577287213] [2023-08-30 06:17:00,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:17:00,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:17:00,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:17:00,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:17:01,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 562 [2023-08-30 06:17:01,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:01,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:01,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 562 [2023-08-30 06:17:01,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:03,232 INFO L130 PetriNetUnfolder]: 8211/11410 cut-off events. [2023-08-30 06:17:03,232 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-30 06:17:03,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23092 conditions, 11410 events. 8211/11410 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 59793 event pairs, 7140 based on Foata normal form. 0/3556 useless extension candidates. Maximal degree in co-relation 21710. Up to 11410 conditions per place. [2023-08-30 06:17:03,306 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 60 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 06:17:03,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 262 flow [2023-08-30 06:17:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-08-30 06:17:03,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42289442467378413 [2023-08-30 06:17:03,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-08-30 06:17:03,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-08-30 06:17:03,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:03,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-08-30 06:17:03,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:03,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:03,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:03,349 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 148 flow. Second operand 3 states and 713 transitions. [2023-08-30 06:17:03,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 262 flow [2023-08-30 06:17:03,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:17:03,359 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 130 flow [2023-08-30 06:17:03,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-08-30 06:17:03,364 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2023-08-30 06:17:03,364 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 130 flow [2023-08-30 06:17:03,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:03,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:03,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:17:03,381 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 06:17:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:03,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:03,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 43201, now seen corresponding path program 1 times [2023-08-30 06:17:03,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:03,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269618499] [2023-08-30 06:17:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:03,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:03,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:17:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:17:03,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:03,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:17:03,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:17:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:03,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:17:03,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269618499] [2023-08-30 06:17:03,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269618499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:17:03,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:17:03,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:17:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696745766] [2023-08-30 06:17:03,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:17:03,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:17:03,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:17:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:17:04,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 562 [2023-08-30 06:17:04,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:04,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:04,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 562 [2023-08-30 06:17:04,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:07,029 INFO L130 PetriNetUnfolder]: 16421/22816 cut-off events. [2023-08-30 06:17:07,029 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-08-30 06:17:07,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 22816 events. 16421/22816 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 1408. Compared 132587 event pairs, 14280 based on Foata normal form. 0/7111 useless extension candidates. Maximal degree in co-relation 45840. Up to 11411 conditions per place. [2023-08-30 06:17:07,159 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 112 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-08-30 06:17:07,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 486 flow [2023-08-30 06:17:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-08-30 06:17:07,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561091340450771 [2023-08-30 06:17:07,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-08-30 06:17:07,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-08-30 06:17:07,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:07,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-08-30 06:17:07,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:07,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:07,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:07,170 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 130 flow. Second operand 3 states and 769 transitions. [2023-08-30 06:17:07,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 486 flow [2023-08-30 06:17:07,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 118 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:17:07,174 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 179 flow [2023-08-30 06:17:07,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-30 06:17:07,175 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2023-08-30 06:17:07,176 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 179 flow [2023-08-30 06:17:07,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:07,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:07,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:17:07,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:17:07,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:07,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:07,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1342659, now seen corresponding path program 1 times [2023-08-30 06:17:07,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:07,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415723300] [2023-08-30 06:17:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:07,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:07,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:07,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:07,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:17:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:17:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:07,579 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:17:07,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:17:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:07,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:17:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:07,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415723300] [2023-08-30 06:17:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415723300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:17:07,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:17:07,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:17:07,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645451831] [2023-08-30 06:17:07,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:17:07,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:17:07,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:17:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:17:08,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-30 06:17:08,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:08,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:08,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-30 06:17:08,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:13,371 INFO L130 PetriNetUnfolder]: 24641/34238 cut-off events. [2023-08-30 06:17:13,372 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2023-08-30 06:17:13,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68837 conditions, 34238 events. 24641/34238 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 1927. Compared 206499 event pairs, 21420 based on Foata normal form. 0/10687 useless extension candidates. Maximal degree in co-relation 68828. Up to 11412 conditions per place. [2023-08-30 06:17:13,563 INFO L137 encePairwiseOnDemand]: 550/562 looper letters, 164 selfloop transitions, 27 changer transitions 0/191 dead transitions. [2023-08-30 06:17:13,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 191 transitions, 865 flow [2023-08-30 06:17:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:17:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:17:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1406 transitions. [2023-08-30 06:17:13,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169632265717675 [2023-08-30 06:17:13,568 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1406 transitions. [2023-08-30 06:17:13,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1406 transitions. [2023-08-30 06:17:13,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:13,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1406 transitions. [2023-08-30 06:17:13,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.33333333333334) internal successors, (1406), 6 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:13,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:13,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:13,583 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 179 flow. Second operand 6 states and 1406 transitions. [2023-08-30 06:17:13,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 191 transitions, 865 flow [2023-08-30 06:17:13,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 841 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:17:13,588 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 371 flow [2023-08-30 06:17:13,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-30 06:17:13,590 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2023-08-30 06:17:13,590 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 371 flow [2023-08-30 06:17:13,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:13,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:13,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:17:13,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:17:13,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:13,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:13,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash 41679634, now seen corresponding path program 1 times [2023-08-30 06:17:13,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:13,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102706213] [2023-08-30 06:17:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:13,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:13,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:13,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:13,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:17:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:17:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:13,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:13,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:13,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:14,004 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:17:14,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:17:14,033 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:17:14,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:17:14,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:14,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:17:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:14,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:17:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:14,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:17:14,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102706213] [2023-08-30 06:17:14,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102706213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:17:14,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:17:14,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:17:14,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646931801] [2023-08-30 06:17:14,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:17:14,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:17:14,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:17:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:17:14,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-30 06:17:14,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:14,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:14,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-30 06:17:14,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:17,016 INFO L130 PetriNetUnfolder]: 18906/26589 cut-off events. [2023-08-30 06:17:17,016 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2023-08-30 06:17:17,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53601 conditions, 26589 events. 18906/26589 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 161101 event pairs, 16380 based on Foata normal form. 0/9008 useless extension candidates. Maximal degree in co-relation 53588. Up to 26589 conditions per place. [2023-08-30 06:17:17,161 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 82 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-08-30 06:17:17,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 517 flow [2023-08-30 06:17:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-30 06:17:17,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43297746144721233 [2023-08-30 06:17:17,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-30 06:17:17,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-30 06:17:17,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:17,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-30 06:17:17,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:17,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:17,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:17,172 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 371 flow. Second operand 3 states and 730 transitions. [2023-08-30 06:17:17,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 517 flow [2023-08-30 06:17:17,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 487 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:17:17,176 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 323 flow [2023-08-30 06:17:17,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-30 06:17:17,178 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2023-08-30 06:17:17,181 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 323 flow [2023-08-30 06:17:17,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:17,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:17,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:17:17,195 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 (5)] Ended with exit code 0 [2023-08-30 06:17:17,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:17,392 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:17,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 41679636, now seen corresponding path program 1 times [2023-08-30 06:17:17,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:17,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120775144] [2023-08-30 06:17:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:17,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:17,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:17,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:17,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:17:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:17:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:17,582 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:17:17,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 06:17:17,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:17,833 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 06:17:17,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 06:17:18,153 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 06:17:18,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-30 06:17:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:18,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:17:18,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120775144] [2023-08-30 06:17:18,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120775144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:17:18,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:17:18,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:17:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499022535] [2023-08-30 06:17:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:17:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:17:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:17:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:17:19,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-30 06:17:19,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:19,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:19,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-30 06:17:19,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:21,174 INFO L130 PetriNetUnfolder]: 13171/18940 cut-off events. [2023-08-30 06:17:21,174 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-30 06:17:21,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 18940 events. 13171/18940 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 114299 event pairs, 11340 based on Foata normal form. 0/7328 useless extension candidates. Maximal degree in co-relation 38263. Up to 18940 conditions per place. [2023-08-30 06:17:21,292 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 78 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-08-30 06:17:21,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 461 flow [2023-08-30 06:17:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2023-08-30 06:17:21,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431791221826809 [2023-08-30 06:17:21,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2023-08-30 06:17:21,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2023-08-30 06:17:21,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:21,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2023-08-30 06:17:21,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:21,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:21,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:21,303 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 323 flow. Second operand 3 states and 728 transitions. [2023-08-30 06:17:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 461 flow [2023-08-30 06:17:21,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:17:21,306 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 304 flow [2023-08-30 06:17:21,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2023-08-30 06:17:21,308 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-08-30 06:17:21,309 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 304 flow [2023-08-30 06:17:21,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:21,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:21,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:17:21,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:17:21,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:21,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:21,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456870, now seen corresponding path program 1 times [2023-08-30 06:17:21,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352277253] [2023-08-30 06:17:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:21,523 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 06:17:21,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:21,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:21,525 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 (7)] Waiting until timeout for monitored process [2023-08-30 06:17:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:17:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:21,700 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 06:17:21,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 06:17:21,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:21,909 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 06:17:21,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 06:17:22,056 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:17:22,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:17:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:22,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:17:22,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:22,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352277253] [2023-08-30 06:17:22,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352277253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:17:22,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:17:22,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:17:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411027851] [2023-08-30 06:17:22,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:17:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:17:22,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:17:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:17:22,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-30 06:17:22,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:22,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:22,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-30 06:17:22,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:24,314 INFO L130 PetriNetUnfolder]: 12838/18421 cut-off events. [2023-08-30 06:17:24,314 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 06:17:24,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37240 conditions, 18421 events. 12838/18421 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 110448 event pairs, 11052 based on Foata normal form. 0/7232 useless extension candidates. Maximal degree in co-relation 37225. Up to 18421 conditions per place. [2023-08-30 06:17:24,409 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-08-30 06:17:24,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 454 flow [2023-08-30 06:17:24,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-08-30 06:17:24,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306049822064057 [2023-08-30 06:17:24,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-08-30 06:17:24,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-08-30 06:17:24,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:24,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-08-30 06:17:24,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:24,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:24,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:24,419 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 304 flow. Second operand 3 states and 726 transitions. [2023-08-30 06:17:24,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 454 flow [2023-08-30 06:17:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:17:24,421 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 301 flow [2023-08-30 06:17:24,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2023-08-30 06:17:24,422 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-08-30 06:17:24,422 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 301 flow [2023-08-30 06:17:24,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:24,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:24,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:17:24,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-30 06:17:24,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:24,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:24,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456871, now seen corresponding path program 1 times [2023-08-30 06:17:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834594219] [2023-08-30 06:17:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:24,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:24,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:24,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:17:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:17:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:24,811 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 06:17:24,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 06:17:24,824 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 06:17:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:24,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:17:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:17:24,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:17:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:24,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:17:24,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834594219] [2023-08-30 06:17:24,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834594219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:17:24,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:17:24,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:17:24,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129816737] [2023-08-30 06:17:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:17:24,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:17:24,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:24,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:17:24,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:17:25,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-30 06:17:25,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:25,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:25,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-30 06:17:25,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:26,729 INFO L130 PetriNetUnfolder]: 12505/17902 cut-off events. [2023-08-30 06:17:26,730 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-30 06:17:26,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36203 conditions, 17902 events. 12505/17902 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 106551 event pairs, 10764 based on Foata normal form. 0/7136 useless extension candidates. Maximal degree in co-relation 36187. Up to 17902 conditions per place. [2023-08-30 06:17:26,821 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 74 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-30 06:17:26,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 447 flow [2023-08-30 06:17:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-08-30 06:17:26,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294187425860024 [2023-08-30 06:17:26,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-08-30 06:17:26,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-08-30 06:17:26,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:26,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-08-30 06:17:26,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:26,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:26,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:26,828 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 301 flow. Second operand 3 states and 724 transitions. [2023-08-30 06:17:26,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 447 flow [2023-08-30 06:17:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:17:26,830 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 298 flow [2023-08-30 06:17:26,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-30 06:17:26,830 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2023-08-30 06:17:26,831 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 298 flow [2023-08-30 06:17:26,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:26,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:26,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:17:26,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:17:27,032 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 06:17:27,033 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:27,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456876, now seen corresponding path program 1 times [2023-08-30 06:17:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:27,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063725327] [2023-08-30 06:17:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:27,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:27,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:27,035 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 06:17:27,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:17:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:17:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:27,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:17:27,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:27,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063725327] [2023-08-30 06:17:27,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063725327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:17:27,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:17:27,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:17:27,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275009493] [2023-08-30 06:17:27,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:17:27,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:17:27,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:17:27,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:17:27,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 06:17:27,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:27,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:27,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 06:17:27,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:29,011 INFO L130 PetriNetUnfolder]: 13741/19798 cut-off events. [2023-08-30 06:17:29,012 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-30 06:17:29,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40005 conditions, 19798 events. 13741/19798 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 123880 event pairs, 4383 based on Foata normal form. 0/8084 useless extension candidates. Maximal degree in co-relation 39988. Up to 17944 conditions per place. [2023-08-30 06:17:29,083 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 97 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-08-30 06:17:29,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 552 flow [2023-08-30 06:17:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-08-30 06:17:29,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-08-30 06:17:29,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-08-30 06:17:29,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-08-30 06:17:29,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:29,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-08-30 06:17:29,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:29,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:29,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:29,089 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 298 flow. Second operand 3 states and 764 transitions. [2023-08-30 06:17:29,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 552 flow [2023-08-30 06:17:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:17:29,092 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 324 flow [2023-08-30 06:17:29,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-08-30 06:17:29,092 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-08-30 06:17:29,093 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 324 flow [2023-08-30 06:17:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:29,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:29,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:17:29,104 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 (9)] Ended with exit code 0 [2023-08-30 06:17:29,300 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 06:17:29,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:17:29,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1347852609, now seen corresponding path program 2 times [2023-08-30 06:17:29,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:29,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754801110] [2023-08-30 06:17:29,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:17:29,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:29,304 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 06:17:29,306 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 06:17:29,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:17:29,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:17:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:17:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:29,481 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:17:29,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:17:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:29,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:17:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:30,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754801110] [2023-08-30 06:17:30,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754801110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:17:30,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:17:30,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:17:30,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392034678] [2023-08-30 06:17:30,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:17:30,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:17:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:17:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:17:34,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 562 [2023-08-30 06:17:34,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:34,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:34,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 562 [2023-08-30 06:17:34,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:36,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:37,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:38,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:40,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:42,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:44,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:46,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:47,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:49,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:51,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:52,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:17:55,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:18:06,536 INFO L130 PetriNetUnfolder]: 45784/65950 cut-off events. [2023-08-30 06:18:06,537 INFO L131 PetriNetUnfolder]: For 5916/5916 co-relation queries the response was YES. [2023-08-30 06:18:06,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145479 conditions, 65950 events. 45784/65950 cut-off events. For 5916/5916 co-relation queries the response was YES. Maximal size of possible extension queue 2282. Compared 450596 event pairs, 38020 based on Foata normal form. 18/33434 useless extension candidates. Maximal degree in co-relation 145460. Up to 11561 conditions per place. [2023-08-30 06:18:06,914 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 468 selfloop transitions, 52 changer transitions 0/520 dead transitions. [2023-08-30 06:18:06,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 520 transitions, 2636 flow [2023-08-30 06:18:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:18:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:18:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2966 transitions. [2023-08-30 06:18:06,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43979833926453143 [2023-08-30 06:18:06,923 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2966 transitions. [2023-08-30 06:18:06,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2966 transitions. [2023-08-30 06:18:06,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:18:06,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2966 transitions. [2023-08-30 06:18:06,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 247.16666666666666) internal successors, (2966), 12 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:06,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:06,941 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:06,941 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 324 flow. Second operand 12 states and 2966 transitions. [2023-08-30 06:18:06,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 520 transitions, 2636 flow [2023-08-30 06:18:06,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 520 transitions, 2615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:18:06,961 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 711 flow [2023-08-30 06:18:06,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=711, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2023-08-30 06:18:06,962 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 17 predicate places. [2023-08-30 06:18:06,962 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 711 flow [2023-08-30 06:18:06,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:06,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:18:06,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:18:06,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-30 06:18:07,172 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 06:18:07,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:18:07,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:18:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash 553320635, now seen corresponding path program 1 times [2023-08-30 06:18:07,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:18:07,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386709713] [2023-08-30 06:18:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:18:07,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:18:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:18:07,175 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 06:18:07,178 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 06:18:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:18:07,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:18:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:18:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:18:07,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:18:07,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:18:07,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386709713] [2023-08-30 06:18:07,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386709713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:18:07,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:18:07,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:18:07,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048509856] [2023-08-30 06:18:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:18:07,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:18:07,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:18:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:18:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:18:07,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 06:18:07,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 711 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:07,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:18:07,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 06:18:07,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:18:13,388 INFO L130 PetriNetUnfolder]: 39804/57270 cut-off events. [2023-08-30 06:18:13,389 INFO L131 PetriNetUnfolder]: For 2741/2741 co-relation queries the response was YES. [2023-08-30 06:18:13,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125668 conditions, 57270 events. 39804/57270 cut-off events. For 2741/2741 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 375646 event pairs, 14150 based on Foata normal form. 0/30268 useless extension candidates. Maximal degree in co-relation 125641. Up to 48391 conditions per place. [2023-08-30 06:18:13,733 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 129 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-08-30 06:18:13,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 1032 flow [2023-08-30 06:18:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:18:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:18:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-30 06:18:13,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513641755634638 [2023-08-30 06:18:13,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-30 06:18:13,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-30 06:18:13,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:18:13,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-30 06:18:13,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:13,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:13,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:13,741 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 711 flow. Second operand 3 states and 761 transitions. [2023-08-30 06:18:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 1032 flow [2023-08-30 06:18:13,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 939 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 06:18:13,746 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 630 flow [2023-08-30 06:18:13,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=85, PETRI_TRANSITIONS=108} [2023-08-30 06:18:13,747 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2023-08-30 06:18:13,747 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 630 flow [2023-08-30 06:18:13,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:13,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:18:13,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:18:13,757 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 06:18:13,956 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 06:18:13,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:18:13,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:18:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash 553320669, now seen corresponding path program 1 times [2023-08-30 06:18:13,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:18:13,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105499627] [2023-08-30 06:18:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:18:13,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:18:13,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:18:13,958 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 06:18:13,959 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 06:18:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:18:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:18:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:18:14,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:18:14,165 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 06:18:14,166 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 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 06:18:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:18:14,181 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 44 treesize of output 42 [2023-08-30 06:18:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:18:14,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:18:14,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:18:14,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:18:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:18:14,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:18:14,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:18:14,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105499627] [2023-08-30 06:18:14,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105499627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:18:14,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:18:14,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:18:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550374313] [2023-08-30 06:18:14,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:18:14,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:18:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:18:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:18:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:18:14,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-30 06:18:14,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 108 transitions, 630 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:14,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:18:14,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-30 06:18:14,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:18:20,878 INFO L130 PetriNetUnfolder]: 39584/56830 cut-off events. [2023-08-30 06:18:20,879 INFO L131 PetriNetUnfolder]: For 5170/5170 co-relation queries the response was YES. [2023-08-30 06:18:21,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132122 conditions, 56830 events. 39584/56830 cut-off events. For 5170/5170 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 380232 event pairs, 34280 based on Foata normal form. 0/32110 useless extension candidates. Maximal degree in co-relation 132093. Up to 56830 conditions per place. [2023-08-30 06:18:21,265 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-30 06:18:21,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 106 transitions, 838 flow [2023-08-30 06:18:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:18:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:18:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2023-08-30 06:18:21,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42823250296559906 [2023-08-30 06:18:21,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2023-08-30 06:18:21,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2023-08-30 06:18:21,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:18:21,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2023-08-30 06:18:21,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:21,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:21,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:21,273 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 630 flow. Second operand 3 states and 722 transitions. [2023-08-30 06:18:21,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 106 transitions, 838 flow [2023-08-30 06:18:21,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 836 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:18:21,278 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 626 flow [2023-08-30 06:18:21,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2023-08-30 06:18:21,279 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2023-08-30 06:18:21,279 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 626 flow [2023-08-30 06:18:21,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:21,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:18:21,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:18:21,292 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 06:18:21,489 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 06:18:21,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:18:21,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:18:21,490 INFO L85 PathProgramCache]: Analyzing trace with hash 553320671, now seen corresponding path program 1 times [2023-08-30 06:18:21,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:18:21,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3110109] [2023-08-30 06:18:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:18:21,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:18:21,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:18:21,491 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 06:18:21,492 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 06:18:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:18:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:18:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:18:21,648 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:18:21,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 06:18:21,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:18:21,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:18:21,705 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:18:21,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:18:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:18:21,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:18:21,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:18:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3110109] [2023-08-30 06:18:21,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3110109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:18:21,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:18:21,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:18:21,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309453644] [2023-08-30 06:18:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:18:21,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:18:21,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:18:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:18:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:18:21,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 562 [2023-08-30 06:18:21,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:21,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:18:21,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 562 [2023-08-30 06:18:21,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:18:28,313 INFO L130 PetriNetUnfolder]: 39364/56390 cut-off events. [2023-08-30 06:18:28,313 INFO L131 PetriNetUnfolder]: For 5140/5140 co-relation queries the response was YES. [2023-08-30 06:18:28,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130933 conditions, 56390 events. 39364/56390 cut-off events. For 5140/5140 co-relation queries the response was YES. Maximal size of possible extension queue 1791. Compared 375838 event pairs, 34080 based on Foata normal form. 0/31990 useless extension candidates. Maximal degree in co-relation 130903. Up to 56390 conditions per place. [2023-08-30 06:18:28,711 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-30 06:18:28,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 830 flow [2023-08-30 06:18:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:18:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:18:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-08-30 06:18:28,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199288256227758 [2023-08-30 06:18:28,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-08-30 06:18:28,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-08-30 06:18:28,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:18:28,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-08-30 06:18:28,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 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 06:18:28,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:28,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:28,726 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 626 flow. Second operand 3 states and 708 transitions. [2023-08-30 06:18:28,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 830 flow [2023-08-30 06:18:28,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:18:28,731 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 623 flow [2023-08-30 06:18:28,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=623, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2023-08-30 06:18:28,733 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2023-08-30 06:18:28,733 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 623 flow [2023-08-30 06:18:28,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:28,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:18:28,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:18:28,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:18:28,943 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 06:18:28,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:18:28,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:18:28,943 INFO L85 PathProgramCache]: Analyzing trace with hash -834747525, now seen corresponding path program 1 times [2023-08-30 06:18:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:18:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815032108] [2023-08-30 06:18:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:18:28,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:18:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:18:28,945 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 06:18:28,946 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 06:18:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:18:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:18:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:18:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:18:29,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:18:29,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:18:29,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815032108] [2023-08-30 06:18:29,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815032108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:18:29,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:18:29,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:18:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539566328] [2023-08-30 06:18:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:18:29,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:18:29,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:18:29,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:18:29,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:18:29,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 562 [2023-08-30 06:18:29,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 623 flow. Second operand has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:29,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:18:29,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 562 [2023-08-30 06:18:29,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:18:36,235 INFO L130 PetriNetUnfolder]: 39746/57226 cut-off events. [2023-08-30 06:18:36,235 INFO L131 PetriNetUnfolder]: For 5343/5343 co-relation queries the response was YES. [2023-08-30 06:18:36,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132804 conditions, 57226 events. 39746/57226 cut-off events. For 5343/5343 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 384253 event pairs, 34450 based on Foata normal form. 140/32966 useless extension candidates. Maximal degree in co-relation 132773. Up to 56389 conditions per place. [2023-08-30 06:18:36,627 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 155 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2023-08-30 06:18:36,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 158 transitions, 1284 flow [2023-08-30 06:18:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:18:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:18:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 943 transitions. [2023-08-30 06:18:36,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194839857651246 [2023-08-30 06:18:36,630 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 943 transitions. [2023-08-30 06:18:36,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 943 transitions. [2023-08-30 06:18:36,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:18:36,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 943 transitions. [2023-08-30 06:18:36,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:36,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:36,635 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:36,635 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 623 flow. Second operand 4 states and 943 transitions. [2023-08-30 06:18:36,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 158 transitions, 1284 flow [2023-08-30 06:18:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 158 transitions, 1283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:18:36,641 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 635 flow [2023-08-30 06:18:36,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=635, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2023-08-30 06:18:36,642 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 17 predicate places. [2023-08-30 06:18:36,642 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 635 flow [2023-08-30 06:18:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:18:36,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:18:36,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:18:36,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:18:36,853 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 06:18:36,853 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:18:36,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:18:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash -540576387, now seen corresponding path program 1 times [2023-08-30 06:18:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:18:36,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125441548] [2023-08-30 06:18:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:18:36,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:18:36,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:18:36,855 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 06:18:36,858 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 06:18:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:18:37,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:18:37,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:18:37,118 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:18:37,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:18:37,200 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:18:37,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:18:37,336 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:18:37,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:18:37,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:18:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:18:37,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:18:37,396 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:18:37,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:18:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:18:37,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:18:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:18:43,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:18:43,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125441548] [2023-08-30 06:18:43,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125441548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:18:43,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:18:43,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:18:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067824085] [2023-08-30 06:18:43,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:18:43,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:18:43,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:18:43,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:18:43,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:18:46,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:50,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:52,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:55,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:57,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:00,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:03,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:06,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:07,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:07,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 562 [2023-08-30 06:19:07,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 635 flow. Second operand has 10 states, 10 states have (on average 179.2) internal successors, (1792), 10 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:07,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:07,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 562 [2023-08-30 06:19:07,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:19,844 WARN L222 SmtUtils]: Spent 11.96s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:19:28,210 WARN L222 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:19:30,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:46,784 WARN L222 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:20:00,990 WARN L222 SmtUtils]: Spent 12.49s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:20:16,424 WARN L222 SmtUtils]: Spent 11.70s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:20:31,488 INFO L130 PetriNetUnfolder]: 70290/101558 cut-off events. [2023-08-30 06:20:31,488 INFO L131 PetriNetUnfolder]: For 15749/15749 co-relation queries the response was YES. [2023-08-30 06:20:31,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243648 conditions, 101558 events. 70290/101558 cut-off events. For 15749/15749 co-relation queries the response was YES. Maximal size of possible extension queue 3030. Compared 732735 event pairs, 59410 based on Foata normal form. 4840/70538 useless extension candidates. Maximal degree in co-relation 243615. Up to 56331 conditions per place. [2023-08-30 06:20:32,262 INFO L137 encePairwiseOnDemand]: 544/562 looper letters, 240 selfloop transitions, 45 changer transitions 0/285 dead transitions. [2023-08-30 06:20:32,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 285 transitions, 2133 flow [2023-08-30 06:20:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:20:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:20:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2851 transitions. [2023-08-30 06:20:32,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33819691577698696 [2023-08-30 06:20:32,269 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2851 transitions. [2023-08-30 06:20:32,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2851 transitions. [2023-08-30 06:20:32,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:20:32,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2851 transitions. [2023-08-30 06:20:32,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 190.06666666666666) internal successors, (2851), 15 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:32,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 562.0) internal successors, (8992), 16 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:32,286 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 562.0) internal successors, (8992), 16 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:32,287 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 635 flow. Second operand 15 states and 2851 transitions. [2023-08-30 06:20:32,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 285 transitions, 2133 flow [2023-08-30 06:20:32,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 285 transitions, 2127 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:20:32,315 INFO L231 Difference]: Finished difference. Result has 105 places, 134 transitions, 1113 flow [2023-08-30 06:20:32,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1113, PETRI_PLACES=105, PETRI_TRANSITIONS=134} [2023-08-30 06:20:32,316 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 36 predicate places. [2023-08-30 06:20:32,316 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 134 transitions, 1113 flow [2023-08-30 06:20:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.2) internal successors, (1792), 10 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:32,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:20:32,317 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:20:32,327 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 06:20:32,527 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 06:20:32,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:20:32,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:20:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -598308351, now seen corresponding path program 3 times [2023-08-30 06:20:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:20:32,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766766908] [2023-08-30 06:20:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:20:32,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:20:32,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:20:32,530 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 06:20:32,532 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 06:20:32,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:20:32,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:20:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:20:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:20:32,923 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:20:32,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:20:33,452 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 06:20:33,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:20:36,338 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 06:20:36,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:20:36,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766766908] [2023-08-30 06:20:36,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766766908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:20:36,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:20:36,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:20:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734580664] [2023-08-30 06:20:36,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:20:36,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:20:36,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:20:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:20:36,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:21:00,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 562 [2023-08-30 06:21:00,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 134 transitions, 1113 flow. Second operand has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:00,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:00,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 562 [2023-08-30 06:21:00,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:10,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:12,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:14,550 WARN L539 Checker$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 06:21:16,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:18,558 WARN L539 Checker$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 06:21:20,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:22,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:24,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:26,498 WARN L539 Checker$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 06:21:27,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:32,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:34,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:36,867 WARN L539 Checker$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 06:21:38,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:40,873 WARN L539 Checker$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 06:21:42,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:44,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:46,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:48,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:50,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:21:57,323 WARN L539 Checker$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 06:22:28,647 INFO L130 PetriNetUnfolder]: 98410/142190 cut-off events. [2023-08-30 06:22:28,647 INFO L131 PetriNetUnfolder]: For 61390/61390 co-relation queries the response was YES. [2023-08-30 06:22:29,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397284 conditions, 142190 events. 98410/142190 cut-off events. For 61390/61390 co-relation queries the response was YES. Maximal size of possible extension queue 3365. Compared 1045024 event pairs, 83174 based on Foata normal form. 40/95162 useless extension candidates. Maximal degree in co-relation 397244. Up to 27665 conditions per place. [2023-08-30 06:22:29,967 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 629 selfloop transitions, 111 changer transitions 0/740 dead transitions. [2023-08-30 06:22:29,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 740 transitions, 5469 flow [2023-08-30 06:22:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 06:22:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 06:22:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 6184 transitions. [2023-08-30 06:22:29,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40753921180967445 [2023-08-30 06:22:29,978 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 6184 transitions. [2023-08-30 06:22:29,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 6184 transitions. [2023-08-30 06:22:29,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:29,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 6184 transitions. [2023-08-30 06:22:29,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 229.03703703703704) internal successors, (6184), 27 states have internal predecessors, (6184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:29,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:29,999 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:29,999 INFO L175 Difference]: Start difference. First operand has 105 places, 134 transitions, 1113 flow. Second operand 27 states and 6184 transitions. [2023-08-30 06:22:30,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 740 transitions, 5469 flow [2023-08-30 06:22:30,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 740 transitions, 5446 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 06:22:30,327 INFO L231 Difference]: Finished difference. Result has 145 places, 179 transitions, 1825 flow [2023-08-30 06:22:30,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1825, PETRI_PLACES=145, PETRI_TRANSITIONS=179} [2023-08-30 06:22:30,328 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 76 predicate places. [2023-08-30 06:22:30,328 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 179 transitions, 1825 flow [2023-08-30 06:22:30,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:30,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:30,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:30,346 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 06:22:30,546 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 06:22:30,547 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:22:30,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash 422002152, now seen corresponding path program 1 times [2023-08-30 06:22:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:22:30,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428906332] [2023-08-30 06:22:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:30,547 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 06:22:30,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:22:30,548 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 06:22:30,550 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 (17)] Waiting until timeout for monitored process [2023-08-30 06:22:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:22:30,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:22:30,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:22:30,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:22:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428906332] [2023-08-30 06:22:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428906332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:30,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:30,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:22:30,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111684978] [2023-08-30 06:22:30,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:30,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:22:30,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:22:30,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:22:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:22:30,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 06:22:30,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 179 transitions, 1825 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:30,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:30,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 06:22:30,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:49,634 INFO L130 PetriNetUnfolder]: 89898/130122 cut-off events. [2023-08-30 06:22:49,634 INFO L131 PetriNetUnfolder]: For 63730/63730 co-relation queries the response was YES. [2023-08-30 06:22:50,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366444 conditions, 130122 events. 89898/130122 cut-off events. For 63730/63730 co-relation queries the response was YES. Maximal size of possible extension queue 3121. Compared 932418 event pairs, 32592 based on Foata normal form. 3500/89242 useless extension candidates. Maximal degree in co-relation 366388. Up to 116355 conditions per place. [2023-08-30 06:22:51,290 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 206 selfloop transitions, 2 changer transitions 0/208 dead transitions. [2023-08-30 06:22:51,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 208 transitions, 2372 flow [2023-08-30 06:22:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:22:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:22:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-08-30 06:22:51,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-08-30 06:22:51,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-08-30 06:22:51,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-08-30 06:22:51,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:51,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-08-30 06:22:51,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:51,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:51,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:51,296 INFO L175 Difference]: Start difference. First operand has 145 places, 179 transitions, 1825 flow. Second operand 3 states and 764 transitions. [2023-08-30 06:22:51,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 208 transitions, 2372 flow [2023-08-30 06:22:51,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 208 transitions, 2133 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-08-30 06:22:51,701 INFO L231 Difference]: Finished difference. Result has 138 places, 180 transitions, 1602 flow [2023-08-30 06:22:51,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1602, PETRI_PLACES=138, PETRI_TRANSITIONS=180} [2023-08-30 06:22:51,701 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 69 predicate places. [2023-08-30 06:22:51,701 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 180 transitions, 1602 flow [2023-08-30 06:22:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:51,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:51,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:51,709 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 06:22:51,902 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 06:22:51,903 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:22:51,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 422002406, now seen corresponding path program 1 times [2023-08-30 06:22:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:22:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105544619] [2023-08-30 06:22:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:51,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:22:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:22:51,905 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 06:22:51,905 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 06:22:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:22:52,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:22:52,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:22:52,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:22:52,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105544619] [2023-08-30 06:22:52,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105544619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:52,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:52,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:22:52,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811826971] [2023-08-30 06:22:52,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:52,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:22:52,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:22:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:22:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:22:52,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 562 [2023-08-30 06:22:52,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 180 transitions, 1602 flow. Second operand has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:52,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:52,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 562 [2023-08-30 06:22:52,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:23:10,145 INFO L130 PetriNetUnfolder]: 83751/121375 cut-off events. [2023-08-30 06:23:10,145 INFO L131 PetriNetUnfolder]: For 62483/62483 co-relation queries the response was YES. [2023-08-30 06:23:11,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360616 conditions, 121375 events. 83751/121375 cut-off events. For 62483/62483 co-relation queries the response was YES. Maximal size of possible extension queue 3063. Compared 886374 event pairs, 70351 based on Foata normal form. 12/80159 useless extension candidates. Maximal degree in co-relation 360558. Up to 120662 conditions per place. [2023-08-30 06:23:11,875 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 164 selfloop transitions, 38 changer transitions 1/203 dead transitions. [2023-08-30 06:23:11,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 203 transitions, 2111 flow [2023-08-30 06:23:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:23:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:23:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1160 transitions. [2023-08-30 06:23:11,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128113879003559 [2023-08-30 06:23:11,879 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1160 transitions. [2023-08-30 06:23:11,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1160 transitions. [2023-08-30 06:23:11,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:23:11,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1160 transitions. [2023-08-30 06:23:11,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:11,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:11,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:11,883 INFO L175 Difference]: Start difference. First operand has 138 places, 180 transitions, 1602 flow. Second operand 5 states and 1160 transitions. [2023-08-30 06:23:11,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 203 transitions, 2111 flow [2023-08-30 06:23:12,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 203 transitions, 2109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:23:12,105 INFO L231 Difference]: Finished difference. Result has 143 places, 182 transitions, 1743 flow [2023-08-30 06:23:12,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1743, PETRI_PLACES=143, PETRI_TRANSITIONS=182} [2023-08-30 06:23:12,106 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 74 predicate places. [2023-08-30 06:23:12,106 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 182 transitions, 1743 flow [2023-08-30 06:23:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:12,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:23:12,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:23:12,117 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 06:23:12,313 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 06:23:12,313 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:23:12,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:23:12,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1926378656, now seen corresponding path program 1 times [2023-08-30 06:23:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:23:12,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148010135] [2023-08-30 06:23:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:23:12,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:23:12,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:23:12,316 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 06:23:12,316 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 06:23:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:23:12,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:23:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:23:12,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:23:12,680 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 06:23:12,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:23:14,349 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 06:23:14,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:23:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148010135] [2023-08-30 06:23:14,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148010135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:23:14,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:23:14,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 06:23:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650944983] [2023-08-30 06:23:14,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:23:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:23:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:23:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:23:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:23:23,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-30 06:23:23,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 182 transitions, 1743 flow. Second operand has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:23,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:23:23,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-30 06:23:23,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:23:49,097 INFO L130 PetriNetUnfolder]: 79440/115264 cut-off events. [2023-08-30 06:23:49,097 INFO L131 PetriNetUnfolder]: For 67767/67767 co-relation queries the response was YES. [2023-08-30 06:23:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347303 conditions, 115264 events. 79440/115264 cut-off events. For 67767/67767 co-relation queries the response was YES. Maximal size of possible extension queue 2913. Compared 837633 event pairs, 66532 based on Foata normal form. 0/79838 useless extension candidates. Maximal degree in co-relation 347242. Up to 92770 conditions per place. [2023-08-30 06:23:50,797 INFO L137 encePairwiseOnDemand]: 551/562 looper letters, 192 selfloop transitions, 92 changer transitions 1/285 dead transitions. [2023-08-30 06:23:50,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 285 transitions, 2772 flow [2023-08-30 06:23:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:23:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:23:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2524 transitions. [2023-08-30 06:23:50,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37425860023724794 [2023-08-30 06:23:50,802 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2524 transitions. [2023-08-30 06:23:50,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2524 transitions. [2023-08-30 06:23:50,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:23:50,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2524 transitions. [2023-08-30 06:23:50,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.33333333333334) internal successors, (2524), 12 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:50,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:50,809 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:50,809 INFO L175 Difference]: Start difference. First operand has 143 places, 182 transitions, 1743 flow. Second operand 12 states and 2524 transitions. [2023-08-30 06:23:50,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 285 transitions, 2772 flow [2023-08-30 06:23:51,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 285 transitions, 2724 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 06:23:51,051 INFO L231 Difference]: Finished difference. Result has 154 places, 184 transitions, 1920 flow [2023-08-30 06:23:51,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1920, PETRI_PLACES=154, PETRI_TRANSITIONS=184} [2023-08-30 06:23:51,051 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 85 predicate places. [2023-08-30 06:23:51,051 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 184 transitions, 1920 flow [2023-08-30 06:23:51,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:51,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:23:51,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:23:51,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:23:51,252 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 06:23:51,252 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-30 06:23:51,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:23:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1926378657, now seen corresponding path program 1 times [2023-08-30 06:23:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:23:51,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483674607] [2023-08-30 06:23:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:23:51,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:23:51,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:23:51,255 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 06:23:51,258 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 06:23:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:23:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:23:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:23:51,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:23:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:23:51,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:23:51,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:23:51,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483674607] [2023-08-30 06:23:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483674607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:23:51,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:23:51,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:23:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478763522] [2023-08-30 06:23:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:23:51,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:23:51,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:23:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:23:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:23:51,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 562 [2023-08-30 06:23:51,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 184 transitions, 1920 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:51,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:23:51,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 562 [2023-08-30 06:23:51,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand