./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:49:28,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:49:28,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:49:28,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:49:28,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:49:28,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:49:28,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:49:28,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:49:28,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:49:28,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:49:28,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:49:28,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:49:28,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:49:28,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:49:28,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:49:28,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:49:28,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:49:28,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:49:28,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:49:28,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:49:28,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:49:28,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:49:28,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:49:28,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:49:28,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:49:28,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:49:28,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:49:28,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:49:28,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:49:28,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:49:28,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:49:28,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:49:28,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:49:28,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:49:28,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:49:28,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:49:28,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:49:28,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:49:28,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:49:28,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:49:28,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:49:28,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:49:28,237 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:49:28,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:49:28,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:49:28,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:49:28,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:49:28,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:49:28,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:49:28,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:49:28,241 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:49:28,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:49:28,242 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:49:28,242 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:49:28,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:49:28,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:49:28,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:49:28,243 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:49:28,243 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:49:28,243 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:49:28,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:49:28,244 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:49:28,244 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:49:28,244 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:49:28,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:49:28,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:49:28,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:49:28,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:49:28,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:49:28,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:49:28,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:49:28,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:49:28,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:49:28,246 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:49:28,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:49:28,247 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:49:28,247 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:49:28,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:49:28,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:49:28,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:49:28,605 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:49:28,605 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:49:28,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-29 23:49:29,820 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:49:30,041 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:49:30,042 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-29 23:49:30,049 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619c963af/472fdeadf8d544efba33aed21d62260a/FLAG9efd369a7 [2023-08-29 23:49:30,067 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619c963af/472fdeadf8d544efba33aed21d62260a [2023-08-29 23:49:30,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:49:30,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:49:30,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:49:30,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:49:30,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:49:30,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:49:30" (1/1) ... [2023-08-29 23:49:30,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309e14aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:30, skipping insertion in model container [2023-08-29 23:49:30,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:49:30" (1/1) ... [2023-08-29 23:49:30,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:49:30,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:49:30,343 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-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-29 23:49:30,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:49:30,370 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) [2023-08-29 23:49:30,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75fc18da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:30, skipping insertion in model container [2023-08-29 23:49:30,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:49:30,373 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:49:30,375 INFO L158 Benchmark]: Toolchain (without parser) took 303.78ms. Allocated memory is still 92.3MB. Free memory was 70.2MB in the beginning and 59.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:49:30,376 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 65.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:49:30,376 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.41ms. Allocated memory is still 92.3MB. Free memory was 69.9MB in the beginning and 59.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:49:30,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 65.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.41ms. Allocated memory is still 92.3MB. Free memory was 69.9MB in the beginning and 59.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 215]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:49:32,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:49:32,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:49:32,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:49:32,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:49:32,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:49:32,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:49:32,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:49:32,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:49:32,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:49:32,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:49:32,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:49:32,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:49:32,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:49:32,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:49:32,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:49:32,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:49:32,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:49:32,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:49:32,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:49:32,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:49:32,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:49:32,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:49:32,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:49:32,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:49:32,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:49:32,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:49:32,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:49:32,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:49:32,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:49:32,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:49:32,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:49:32,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:49:32,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:49:32,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:49:32,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:49:32,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:49:32,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:49:32,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:49:32,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:49:32,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:49:32,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:49:32,258 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:49:32,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:49:32,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:49:32,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:49:32,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:49:32,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:49:32,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:49:32,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:49:32,262 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:49:32,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:49:32,263 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:49:32,263 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:49:32,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:49:32,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:49:32,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:49:32,264 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:49:32,264 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:49:32,264 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:49:32,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:49:32,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:49:32,265 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:49:32,265 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:49:32,265 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:49:32,265 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:49:32,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:49:32,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:49:32,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:49:32,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:49:32,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:49:32,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:49:32,267 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:49:32,267 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:49:32,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:49:32,268 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:49:32,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:49:32,268 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:49:32,268 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:49:32,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:49:32,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:49:32,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:49:32,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:49:32,589 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:49:32,589 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:49:32,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-29 23:49:33,898 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:49:34,090 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:49:34,091 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-08-29 23:49:34,097 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41f200543/b42a78b281f7422c9e0f63ccc372b1d3/FLAGcab1665a0 [2023-08-29 23:49:34,112 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41f200543/b42a78b281f7422c9e0f63ccc372b1d3 [2023-08-29 23:49:34,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:49:34,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:49:34,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:49:34,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:49:34,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:49:34,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5ae872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34, skipping insertion in model container [2023-08-29 23:49:34,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:49:34,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:49:34,382 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-29 23:49:34,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:49:34,414 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:49:34,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:49:34,462 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-29 23:49:34,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:49:34,485 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:49:34,511 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-08-29 23:49:34,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:49:34,538 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:49:34,538 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:49:34,544 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:49:34,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34 WrapperNode [2023-08-29 23:49:34,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:49:34,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:49:34,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:49:34,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:49:34,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,610 INFO L138 Inliner]: procedures = 28, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 464 [2023-08-29 23:49:34,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:49:34,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:49:34,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:49:34,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:49:34,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:49:34,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:49:34,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:49:34,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:49:34,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (1/1) ... [2023-08-29 23:49:34,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:49:34,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:49:34,725 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) [2023-08-29 23:49:34,727 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 [2023-08-29 23:49:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:49:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:49:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:49:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:49:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:49:34,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:49:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:49:34,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:49:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:49:34,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:49:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:49:34,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:49:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:49:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:49:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:49:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:49:34,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:49:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:49:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:49:34,757 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:49:34,908 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:49:34,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:49:35,825 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:49:36,106 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:49:36,107 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-29 23:49:36,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:49:36 BoogieIcfgContainer [2023-08-29 23:49:36,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:49:36,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:49:36,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:49:36,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:49:36,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:49:34" (1/3) ... [2023-08-29 23:49:36,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7330726d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:49:36, skipping insertion in model container [2023-08-29 23:49:36,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:49:34" (2/3) ... [2023-08-29 23:49:36,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7330726d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:49:36, skipping insertion in model container [2023-08-29 23:49:36,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:49:36" (3/3) ... [2023-08-29 23:49:36,119 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2023-08-29 23:49:36,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:49:36,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-08-29 23:49:36,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:49:36,264 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 23:49:36,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 387 transitions, 806 flow [2023-08-29 23:49:36,472 INFO L130 PetriNetUnfolder]: 37/383 cut-off events. [2023-08-29 23:49:36,473 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:49:36,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 383 events. 37/383 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 475 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-08-29 23:49:36,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 387 transitions, 806 flow [2023-08-29 23:49:36,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 355 places, 379 transitions, 782 flow [2023-08-29 23:49:36,496 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:49:36,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 355 places, 379 transitions, 782 flow [2023-08-29 23:49:36,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 355 places, 379 transitions, 782 flow [2023-08-29 23:49:36,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 379 transitions, 782 flow [2023-08-29 23:49:36,577 INFO L130 PetriNetUnfolder]: 37/379 cut-off events. [2023-08-29 23:49:36,578 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:49:36,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 379 events. 37/379 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 480 event pairs, 0 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-08-29 23:49:36,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 10736 [2023-08-29 23:50:23,893 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 166 DAG size of output: 163 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 23:50:26,783 INFO L134 LiptonReduction]: Checked pairs total: 13873 [2023-08-29 23:50:26,783 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-08-29 23:50:26,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:50:26,808 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;@5572529a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:50:26,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 78 error locations. [2023-08-29 23:50:26,812 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:50:26,812 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:50:26,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:26,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:26,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-29 23:50:26,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:26,817 INFO L85 PathProgramCache]: Analyzing trace with hash 62711, now seen corresponding path program 1 times [2023-08-29 23:50:26,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:26,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264032931] [2023-08-29 23:50:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:26,834 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 [2023-08-29 23:50:26,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:26,841 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) [2023-08-29 23:50:26,853 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 [2023-08-29 23:50:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:50:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:27,321 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:50:27,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:50:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:27,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:27,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:27,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264032931] [2023-08-29 23:50:27,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264032931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:27,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:27,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:27,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334537620] [2023-08-29 23:50:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:27,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:27,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:27,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 837 [2023-08-29 23:50:27,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:27,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:27,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 837 [2023-08-29 23:50:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:50:45,828 INFO L130 PetriNetUnfolder]: 110089/141191 cut-off events. [2023-08-29 23:50:45,829 INFO L131 PetriNetUnfolder]: For 1264/1264 co-relation queries the response was YES. [2023-08-29 23:50:46,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285318 conditions, 141191 events. 110089/141191 cut-off events. For 1264/1264 co-relation queries the response was YES. Maximal size of possible extension queue 10460. Compared 831614 event pairs, 93490 based on Foata normal form. 0/26095 useless extension candidates. Maximal degree in co-relation 134484. Up to 70599 conditions per place. [2023-08-29 23:50:46,938 INFO L137 encePairwiseOnDemand]: 824/837 looper letters, 149 selfloop transitions, 8 changer transitions 0/157 dead transitions. [2023-08-29 23:50:46,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 157 transitions, 676 flow [2023-08-29 23:50:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:50:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:50:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-08-29 23:50:46,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42931103146156907 [2023-08-29 23:50:46,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-08-29 23:50:46,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-08-29 23:50:46,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:50:46,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-08-29 23:50:46,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:46,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:46,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:46,991 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 188 flow. Second operand 3 states and 1078 transitions. [2023-08-29 23:50:46,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 157 transitions, 676 flow [2023-08-29 23:50:47,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 157 transitions, 644 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 23:50:47,275 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 238 flow [2023-08-29 23:50:47,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2023-08-29 23:50:47,280 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-29 23:50:47,280 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 238 flow [2023-08-29 23:50:47,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:47,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:50:47,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:50:47,293 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 [2023-08-29 23:50:47,490 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 [2023-08-29 23:50:47,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-29 23:50:47,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:50:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash 62712, now seen corresponding path program 1 times [2023-08-29 23:50:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:50:47,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132707914] [2023-08-29 23:50:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:50:47,496 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 [2023-08-29 23:50:47,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:50:47,497 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) [2023-08-29 23:50:47,501 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 [2023-08-29 23:50:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:50:47,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:50:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:50:47,699 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:50:47,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:50:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:50:47,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:50:47,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:50:47,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132707914] [2023-08-29 23:50:47,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132707914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:50:47,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:50:47,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:50:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097628531] [2023-08-29 23:50:47,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:50:47,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:50:47,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:50:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:50:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:50:47,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 837 [2023-08-29 23:50:47,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:50:47,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:50:47,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 837 [2023-08-29 23:50:47,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:03,084 INFO L130 PetriNetUnfolder]: 110089/141183 cut-off events. [2023-08-29 23:51:03,084 INFO L131 PetriNetUnfolder]: For 360/360 co-relation queries the response was YES. [2023-08-29 23:51:03,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283603 conditions, 141183 events. 110089/141183 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 10460. Compared 832322 event pairs, 93490 based on Foata normal form. 6/26109 useless extension candidates. Maximal degree in co-relation 141776. Up to 141183 conditions per place. [2023-08-29 23:51:03,921 INFO L137 encePairwiseOnDemand]: 832/837 looper letters, 83 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-29 23:51:03,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 398 flow [2023-08-29 23:51:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:51:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:51:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 996 transitions. [2023-08-29 23:51:03,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966547192353644 [2023-08-29 23:51:03,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 996 transitions. [2023-08-29 23:51:03,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 996 transitions. [2023-08-29 23:51:03,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:03,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 996 transitions. [2023-08-29 23:51:03,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,943 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 238 flow. Second operand 3 states and 996 transitions. [2023-08-29 23:51:03,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 398 flow [2023-08-29 23:51:03,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 84 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:51:03,946 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 216 flow [2023-08-29 23:51:03,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2023-08-29 23:51:03,947 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -9 predicate places. [2023-08-29 23:51:03,947 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 216 flow [2023-08-29 23:51:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:03,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:03,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:51:03,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-29 23:51:04,157 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 [2023-08-29 23:51:04,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-29 23:51:04,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:04,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1951231, now seen corresponding path program 1 times [2023-08-29 23:51:04,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:04,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587229928] [2023-08-29 23:51:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:51:04,159 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 [2023-08-29 23:51:04,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:04,159 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) [2023-08-29 23:51:04,162 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 [2023-08-29 23:51:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:51:04,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:51:04,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:04,413 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:51:04,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:51:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:51:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:04,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:04,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587229928] [2023-08-29 23:51:04,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587229928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:51:04,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:51:04,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:51:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637251079] [2023-08-29 23:51:04,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:51:04,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:51:04,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:04,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:51:04,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:51:05,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 837 [2023-08-29 23:51:05,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:05,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:05,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 837 [2023-08-29 23:51:05,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:51:29,520 INFO L130 PetriNetUnfolder]: 165145/211792 cut-off events. [2023-08-29 23:51:29,520 INFO L131 PetriNetUnfolder]: For 540/540 co-relation queries the response was YES. [2023-08-29 23:51:29,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425438 conditions, 211792 events. 165145/211792 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 11869. Compared 1270774 event pairs, 140235 based on Foata normal form. 0/39155 useless extension candidates. Maximal degree in co-relation 425430. Up to 70598 conditions per place. [2023-08-29 23:51:30,382 INFO L137 encePairwiseOnDemand]: 822/837 looper letters, 206 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2023-08-29 23:51:30,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 241 transitions, 1070 flow [2023-08-29 23:51:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:51:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:51:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1963 transitions. [2023-08-29 23:51:30,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908801274392672 [2023-08-29 23:51:30,388 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1963 transitions. [2023-08-29 23:51:30,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1963 transitions. [2023-08-29 23:51:30,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:51:30,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1963 transitions. [2023-08-29 23:51:30,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 327.1666666666667) internal successors, (1963), 6 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:30,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:30,404 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:30,404 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 216 flow. Second operand 6 states and 1963 transitions. [2023-08-29 23:51:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 241 transitions, 1070 flow [2023-08-29 23:51:30,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 241 transitions, 1069 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:51:30,410 INFO L231 Difference]: Finished difference. Result has 86 places, 111 transitions, 478 flow [2023-08-29 23:51:30,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=86, PETRI_TRANSITIONS=111} [2023-08-29 23:51:30,411 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -1 predicate places. [2023-08-29 23:51:30,411 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 111 transitions, 478 flow [2023-08-29 23:51:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:30,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:51:30,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:51:30,426 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 [2023-08-29 23:51:30,622 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 [2023-08-29 23:51:30,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-29 23:51:30,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:51:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1876965082, now seen corresponding path program 1 times [2023-08-29 23:51:30,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:51:30,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063292639] [2023-08-29 23:51:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:51:30,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:51:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:51:30,625 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) [2023-08-29 23:51:30,626 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 [2023-08-29 23:51:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:51:30,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 23:51:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:51:30,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:30,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:30,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:30,987 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-29 23:51:30,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-29 23:51:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:31,153 INFO L321 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2023-08-29 23:51:31,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-08-29 23:51:31,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:31,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:51:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:31,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:31,486 INFO L321 Elim1Store]: treesize reduction 86, result has 28.3 percent of original size [2023-08-29 23:51:31,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 71 [2023-08-29 23:51:31,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:31,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:51:31,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:31,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:31,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:32,081 INFO L321 Elim1Store]: treesize reduction 108, result has 29.4 percent of original size [2023-08-29 23:51:32,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 87 [2023-08-29 23:51:32,431 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:51:32,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 23:51:32,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:32,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:51:32,557 INFO L321 Elim1Store]: treesize reduction 50, result has 29.6 percent of original size [2023-08-29 23:51:32,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 54 [2023-08-29 23:51:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:51:32,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:51:32,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:51:32,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063292639] [2023-08-29 23:51:32,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063292639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:51:32,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:51:32,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:51:32,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461967437] [2023-08-29 23:51:32,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:51:32,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:51:32,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:51:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:51:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:51:36,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:51:41,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:51:47,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:51:49,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:51:51,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:51:53,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:51:56,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:51:56,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 837 [2023-08-29 23:51:56,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 478 flow. Second operand has 6 states, 6 states have (on average 295.8333333333333) internal successors, (1775), 6 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:51:56,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:51:56,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 837 [2023-08-29 23:51:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:11,153 INFO L130 PetriNetUnfolder]: 92565/121062 cut-off events. [2023-08-29 23:52:11,153 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2023-08-29 23:52:11,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244061 conditions, 121062 events. 92565/121062 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 7321. Compared 729224 event pairs, 78027 based on Foata normal form. 0/28803 useless extension candidates. Maximal degree in co-relation 244048. Up to 121062 conditions per place. [2023-08-29 23:52:11,896 INFO L137 encePairwiseOnDemand]: 832/837 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-29 23:52:11,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 103 transitions, 644 flow [2023-08-29 23:52:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:52:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:52:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2023-08-29 23:52:11,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831142970927917 [2023-08-29 23:52:11,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2023-08-29 23:52:11,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2023-08-29 23:52:11,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:52:11,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2023-08-29 23:52:11,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:11,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:11,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:11,908 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 478 flow. Second operand 3 states and 962 transitions. [2023-08-29 23:52:11,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 103 transitions, 644 flow [2023-08-29 23:52:11,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 103 transitions, 603 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-29 23:52:11,912 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 399 flow [2023-08-29 23:52:11,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=399, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2023-08-29 23:52:11,913 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2023-08-29 23:52:11,913 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 399 flow [2023-08-29 23:52:11,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 295.8333333333333) internal successors, (1775), 6 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:11,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:52:11,914 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:52:11,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:52:12,123 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 [2023-08-29 23:52:12,124 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-29 23:52:12,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:52:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1993279753, now seen corresponding path program 2 times [2023-08-29 23:52:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:52:12,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408864264] [2023-08-29 23:52:12,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:52:12,124 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 [2023-08-29 23:52:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:52:12,126 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) [2023-08-29 23:52:12,127 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 [2023-08-29 23:52:12,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:52:12,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:52:12,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:52:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:52:12,394 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:52:12,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:52:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:52:12,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:52:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:52:13,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:52:13,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408864264] [2023-08-29 23:52:13,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408864264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:52:13,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:52:13,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:52:13,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446499529] [2023-08-29 23:52:13,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:52:13,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:52:13,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:52:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:52:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:52:18,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 837 [2023-08-29 23:52:18,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 399 flow. Second operand has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:52:18,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:52:18,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 837 [2023-08-29 23:52:18,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:52:21,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:23,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:24,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:27,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:29,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:30,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:32,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:36,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:38,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:40,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:41,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:43,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:45,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:46,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:52:51,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:53:41,768 INFO L130 PetriNetUnfolder]: 308525/403484 cut-off events. [2023-08-29 23:53:41,768 INFO L131 PetriNetUnfolder]: For 1887/1887 co-relation queries the response was YES. [2023-08-29 23:53:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813203 conditions, 403484 events. 308525/403484 cut-off events. For 1887/1887 co-relation queries the response was YES. Maximal size of possible extension queue 10443. Compared 2582630 event pairs, 260090 based on Foata normal form. 23/95966 useless extension candidates. Maximal degree in co-relation 813189. Up to 40374 conditions per place. [2023-08-29 23:53:43,915 INFO L137 encePairwiseOnDemand]: 824/837 looper letters, 622 selfloop transitions, 72 changer transitions 0/694 dead transitions. [2023-08-29 23:53:43,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 694 transitions, 3249 flow [2023-08-29 23:53:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:53:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:53:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5052 transitions. [2023-08-29 23:53:43,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402389486260454 [2023-08-29 23:53:43,928 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5052 transitions. [2023-08-29 23:53:43,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5052 transitions. [2023-08-29 23:53:43,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:53:43,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5052 transitions. [2023-08-29 23:53:43,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 336.8) internal successors, (5052), 15 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:43,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 837.0) internal successors, (13392), 16 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:43,959 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 837.0) internal successors, (13392), 16 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:43,960 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 399 flow. Second operand 15 states and 5052 transitions. [2023-08-29 23:53:43,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 694 transitions, 3249 flow [2023-08-29 23:53:43,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 694 transitions, 3248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:53:43,969 INFO L231 Difference]: Finished difference. Result has 105 places, 146 transitions, 929 flow [2023-08-29 23:53:43,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=929, PETRI_PLACES=105, PETRI_TRANSITIONS=146} [2023-08-29 23:53:43,970 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 18 predicate places. [2023-08-29 23:53:43,971 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 146 transitions, 929 flow [2023-08-29 23:53:43,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:53:43,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:53:43,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:53:43,980 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 (6)] Ended with exit code 0 [2023-08-29 23:53:44,175 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 [2023-08-29 23:53:44,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-08-29 23:53:44,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:53:44,176 INFO L85 PathProgramCache]: Analyzing trace with hash -122771836, now seen corresponding path program 1 times [2023-08-29 23:53:44,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:53:44,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877528615] [2023-08-29 23:53:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:53:44,176 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 [2023-08-29 23:53:44,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:53:44,177 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) [2023-08-29 23:53:44,178 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 (7)] Waiting until timeout for monitored process [2023-08-29 23:53:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:53:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:53:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:53:44,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:53:44,435 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-29 23:53:44,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-29 23:53:45,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:53:45,315 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2023-08-29 23:53:45,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 52 [2023-08-29 23:53:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:53:46,336 INFO L321 Elim1Store]: treesize reduction 66, result has 49.2 percent of original size [2023-08-29 23:53:46,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 75 treesize of output 138 [2023-08-29 23:53:55,534 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-29 23:53:55,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 178 [2023-08-29 23:54:18,243 WARN L222 SmtUtils]: Spent 8.51s on a formula simplification. DAG size of input: 232 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:54:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:54:18,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:54:18,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:18,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877528615] [2023-08-29 23:54:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877528615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:54:18,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:54:18,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:54:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495344853] [2023-08-29 23:54:18,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:18,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:54:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:54:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2023-08-29 23:54:20,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:54:21,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:54:25,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:54:30,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:54:30,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 837 [2023-08-29 23:54:30,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 146 transitions, 929 flow. Second operand has 6 states, 6 states have (on average 278.1666666666667) internal successors, (1669), 6 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:30,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:30,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 837 [2023-08-29 23:54:30,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand