./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.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/chl-array-int-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --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 22:35:48,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:35:48,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:35:48,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:35:48,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:35:48,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:35:48,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:35:48,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:35:48,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:35:48,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:35:48,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:35:48,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:35:48,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:35:48,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:35:48,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:35:48,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:35:48,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:35:48,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:35:48,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:35:48,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:35:48,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:35:48,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:35:48,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:35:48,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:35:48,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:35:48,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:35:48,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:35:48,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:35:48,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:35:48,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:35:48,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:35:48,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:35:48,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:35:48,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:35:48,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:35:48,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:35:48,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:35:48,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:35:48,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:35:48,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:35:48,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:35:48,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:35:48,401 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:35:48,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:35:48,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:35:48,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:35:48,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:35:48,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:35:48,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:35:48,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:35:48,405 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:35:48,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:35:48,406 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:35:48,407 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:35:48,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:35:48,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:35:48,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:35:48,407 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:35:48,407 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:35:48,408 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:35:48,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:35:48,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:35:48,408 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:35:48,408 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:35:48,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:35:48,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:35:48,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:35:48,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:35:48,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:35:48,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:35:48,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:35:48,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:35:48,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:35:48,410 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:35:48,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:35:48,411 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:35:48,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:35:48,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:35:48,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:35:48,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:35:48,705 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:35:48,706 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:35:48,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-29 22:35:49,768 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:35:49,979 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:35:49,980 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-29 22:35:49,985 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e48d3bf/ac7a77546ce74adcbd09a561a60cea25/FLAG398fa78f6 [2023-08-29 22:35:49,999 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e48d3bf/ac7a77546ce74adcbd09a561a60cea25 [2023-08-29 22:35:50,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:35:50,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:35:50,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:35:50,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:35:50,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:35:50,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:50" (1/1) ... [2023-08-29 22:35:50,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1148d9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:50, skipping insertion in model container [2023-08-29 22:35:50,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:50" (1/1) ... [2023-08-29 22:35:50,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:35:50,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:35:50,178 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-29 22:35:50,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:35:50,214 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 22:35:50,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f090464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:50, skipping insertion in model container [2023-08-29 22:35:50,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:35:50,217 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:35:50,219 INFO L158 Benchmark]: Toolchain (without parser) took 213.36ms. Allocated memory is still 83.9MB. Free memory was 61.5MB in the beginning and 50.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:35:50,219 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:35:50,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.56ms. Allocated memory is still 83.9MB. Free memory was 61.2MB in the beginning and 50.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:35:50,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.56ms. Allocated memory is still 83.9MB. Free memory was 61.2MB in the beginning and 50.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --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 22:35:51,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:35:51,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:35:51,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:35:51,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:35:51,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:35:51,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:35:51,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:35:51,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:35:51,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:35:51,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:35:51,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:35:51,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:35:51,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:35:51,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:35:51,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:35:51,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:35:51,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:35:51,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:35:51,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:35:51,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:35:51,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:35:51,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:35:51,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:35:51,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:35:51,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:35:51,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:35:51,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:35:51,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:35:51,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:35:51,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:35:51,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:35:51,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:35:51,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:35:51,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:35:51,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:35:51,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:35:51,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:35:51,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:35:51,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:35:51,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:35:51,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:35:51,970 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:35:51,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:35:51,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:35:51,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:35:51,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:35:51,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:35:51,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:35:51,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:35:51,974 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:35:51,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:35:51,975 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:35:51,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:35:51,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:35:51,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:35:51,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:35:51,976 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:35:51,976 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:35:51,976 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:35:51,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:35:51,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:35:51,977 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:35:51,977 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:35:51,977 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:35:51,977 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:35:51,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:35:51,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:35:51,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:35:51,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:35:51,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:35:51,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:35:51,979 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:35:51,979 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:35:51,979 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:35:51,979 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:35:51,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:35:51,980 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:35:51,980 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:35:51,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:35:52,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:35:52,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:35:52,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:35:52,272 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:35:52,272 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:35:52,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-29 22:35:53,289 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:35:53,523 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:35:53,523 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-29 22:35:53,531 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2c3fcab/9561c7b5191845e2a10c9e6734282293/FLAG46983b7c9 [2023-08-29 22:35:53,541 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2c3fcab/9561c7b5191845e2a10c9e6734282293 [2023-08-29 22:35:53,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:35:53,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:35:53,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:35:53,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:35:53,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:35:53,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a72e34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53, skipping insertion in model container [2023-08-29 22:35:53,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:35:53,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:35:53,712 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-29 22:35:53,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:35:53,751 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:35:53,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:35:53,791 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-29 22:35:53,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:35:53,812 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:35:53,836 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-29 22:35:53,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:35:53,852 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:35:53,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53 WrapperNode [2023-08-29 22:35:53,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:35:53,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:35:53,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:35:53,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:35:53,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,919 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 278 [2023-08-29 22:35:53,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:35:53,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:35:53,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:35:53,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:35:53,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,976 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:35:53,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:35:53,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:35:53,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:35:53,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (1/1) ... [2023-08-29 22:35:53,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:35:54,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:35:54,022 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 22:35:54,043 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 22:35:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:35:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:35:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:35:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:35:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:35:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:35:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:35:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:35:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:35:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:35:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:35:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:35:54,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:35:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:35:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:35:54,060 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 22:35:54,227 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:35:54,229 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:35:54,998 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:35:55,012 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:35:55,012 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:35:55,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:55 BoogieIcfgContainer [2023-08-29 22:35:55,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:35:55,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:35:55,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:35:55,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:35:55,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:35:53" (1/3) ... [2023-08-29 22:35:55,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46aa8b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:35:55, skipping insertion in model container [2023-08-29 22:35:55,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:53" (2/3) ... [2023-08-29 22:35:55,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46aa8b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:35:55, skipping insertion in model container [2023-08-29 22:35:55,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:55" (3/3) ... [2023-08-29 22:35:55,024 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-08-29 22:35:55,040 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:35:55,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-29 22:35:55,041 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:35:55,176 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:35:55,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 361 transitions, 746 flow [2023-08-29 22:35:55,350 INFO L130 PetriNetUnfolder]: 29/358 cut-off events. [2023-08-29 22:35:55,350 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:35:55,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 358 events. 29/358 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 778 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-29 22:35:55,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 361 transitions, 746 flow [2023-08-29 22:35:55,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 354 transitions, 726 flow [2023-08-29 22:35:55,383 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:35:55,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 354 transitions, 726 flow [2023-08-29 22:35:55,408 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 354 transitions, 726 flow [2023-08-29 22:35:55,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 354 transitions, 726 flow [2023-08-29 22:35:55,472 INFO L130 PetriNetUnfolder]: 29/354 cut-off events. [2023-08-29 22:35:55,472 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:35:55,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 354 events. 29/354 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 781 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-29 22:35:55,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 21114 [2023-08-29 22:36:28,070 INFO L134 LiptonReduction]: Checked pairs total: 32211 [2023-08-29 22:36:28,070 INFO L136 LiptonReduction]: Total number of compositions: 423 [2023-08-29 22:36:28,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:36:28,087 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;@15c90a40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:36:28,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-29 22:36:28,091 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:36:28,091 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:36:28,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:28,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:36:28,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:36:28,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 46466, now seen corresponding path program 1 times [2023-08-29 22:36:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:36:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255537918] [2023-08-29 22:36:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:28,106 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 22:36:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:36:28,113 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 22:36:28,168 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 22:36:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:28,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:36:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:36:28,395 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:36:28,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:36:28,420 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 22:36:28,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:36:28,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:36:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255537918] [2023-08-29 22:36:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255537918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:36:28,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:36:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:36:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523982432] [2023-08-29 22:36:28,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:36:28,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:36:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:36:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:36:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:36:28,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 784 [2023-08-29 22:36:28,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 22:36:28,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:36:28,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 784 [2023-08-29 22:36:28,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:36:31,974 INFO L130 PetriNetUnfolder]: 17182/23633 cut-off events. [2023-08-29 22:36:31,975 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2023-08-29 22:36:31,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47596 conditions, 23633 events. 17182/23633 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 1595. Compared 133713 event pairs, 14603 based on Foata normal form. 0/7805 useless extension candidates. Maximal degree in co-relation 45108. Up to 23465 conditions per place. [2023-08-29 22:36:32,099 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 69 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-29 22:36:32,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 300 flow [2023-08-29 22:36:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:36:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:36:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1035 transitions. [2023-08-29 22:36:32,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44005102040816324 [2023-08-29 22:36:32,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1035 transitions. [2023-08-29 22:36:32,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1035 transitions. [2023-08-29 22:36:32,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:32,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1035 transitions. [2023-08-29 22:36:32,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 22:36:32,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:32,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:32,137 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 176 flow. Second operand 3 states and 1035 transitions. [2023-08-29 22:36:32,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 300 flow [2023-08-29 22:36:32,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 288 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:36:32,153 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 150 flow [2023-08-29 22:36:32,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-29 22:36:32,159 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-08-29 22:36:32,160 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 150 flow [2023-08-29 22:36:32,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 22:36:32,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:32,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:36:32,182 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 22:36:32,376 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 22:36:32,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:36:32,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash 46467, now seen corresponding path program 1 times [2023-08-29 22:36:32,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:36:32,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863092916] [2023-08-29 22:36:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:32,378 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 22:36:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:36:32,384 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 22:36:32,386 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 22:36:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:36:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:36:32,574 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:36:32,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:36:32,615 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 22:36:32,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:36:32,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:36:32,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863092916] [2023-08-29 22:36:32,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863092916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:36:32,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:36:32,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:36:32,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926932012] [2023-08-29 22:36:32,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:36:32,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:36:32,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:36:32,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:36:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:36:32,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 784 [2023-08-29 22:36:32,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 22:36:32,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:36:32,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 784 [2023-08-29 22:36:32,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:36:37,300 INFO L130 PetriNetUnfolder]: 34363/47262 cut-off events. [2023-08-29 22:36:37,300 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-29 22:36:37,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94586 conditions, 47262 events. 34363/47262 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 2538. Compared 288655 event pairs, 29206 based on Foata normal form. 0/15889 useless extension candidates. Maximal degree in co-relation 94580. Up to 23466 conditions per place. [2023-08-29 22:36:37,547 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-08-29 22:36:37,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 137 transitions, 560 flow [2023-08-29 22:36:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:36:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:36:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1096 transitions. [2023-08-29 22:36:37,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2023-08-29 22:36:37,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1096 transitions. [2023-08-29 22:36:37,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1096 transitions. [2023-08-29 22:36:37,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:37,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1096 transitions. [2023-08-29 22:36:37,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 22:36:37,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:37,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:37,562 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 150 flow. Second operand 3 states and 1096 transitions. [2023-08-29 22:36:37,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 137 transitions, 560 flow [2023-08-29 22:36:37,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:36:37,566 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 199 flow [2023-08-29 22:36:37,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-29 22:36:37,567 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-08-29 22:36:37,568 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 199 flow [2023-08-29 22:36:37,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 22:36:37,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:37,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:36:37,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:36:37,783 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 22:36:37,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:36:37,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1444939, now seen corresponding path program 1 times [2023-08-29 22:36:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:36:37,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220711054] [2023-08-29 22:36:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:37,786 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 22:36:37,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:36:37,789 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 22:36:37,790 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 22:36:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:36:37,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:36:37,970 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:36:37,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:36:38,037 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 22:36:38,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:36:38,223 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 22:36:38,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:36:38,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220711054] [2023-08-29 22:36:38,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220711054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:36:38,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:36:38,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:36:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700356386] [2023-08-29 22:36:38,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:36:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:36:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:36:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:36:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:36:39,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 784 [2023-08-29 22:36:39,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states 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 22:36:39,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:36:39,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 784 [2023-08-29 22:36:39,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:36:41,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:47,916 INFO L130 PetriNetUnfolder]: 51554/70907 cut-off events. [2023-08-29 22:36:47,917 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2023-08-29 22:36:47,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141947 conditions, 70907 events. 51554/70907 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 3947. Compared 458136 event pairs, 43809 based on Foata normal form. 0/23994 useless extension candidates. Maximal degree in co-relation 141938. Up to 23467 conditions per place. [2023-08-29 22:36:48,229 INFO L137 encePairwiseOnDemand]: 772/784 looper letters, 191 selfloop transitions, 27 changer transitions 0/219 dead transitions. [2023-08-29 22:36:48,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 219 transitions, 975 flow [2023-08-29 22:36:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:36:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:36:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2051 transitions. [2023-08-29 22:36:48,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43601190476190477 [2023-08-29 22:36:48,236 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2051 transitions. [2023-08-29 22:36:48,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2051 transitions. [2023-08-29 22:36:48,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:48,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2051 transitions. [2023-08-29 22:36:48,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 341.8333333333333) internal successors, (2051), 6 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states 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 22:36:48,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 784.0) internal successors, (5488), 7 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states 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 22:36:48,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 784.0) internal successors, (5488), 7 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states 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 22:36:48,252 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 199 flow. Second operand 6 states and 2051 transitions. [2023-08-29 22:36:48,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 219 transitions, 975 flow [2023-08-29 22:36:48,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 219 transitions, 951 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:36:48,256 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 391 flow [2023-08-29 22:36:48,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2023-08-29 22:36:48,257 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-08-29 22:36:48,258 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 391 flow [2023-08-29 22:36:48,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states 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 22:36:48,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:48,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:36:48,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:36:48,467 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 22:36:48,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:36:48,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash 44848308, now seen corresponding path program 1 times [2023-08-29 22:36:48,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:36:48,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539136409] [2023-08-29 22:36:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:48,469 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 22:36:48,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:36:48,470 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 22:36:48,471 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 22:36:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:36:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:36:48,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:48,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:48,711 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 22:36:48,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 22:36:48,743 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 22:36:48,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 22:36:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:48,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:36:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:48,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:36:48,870 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 22:36:48,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:36:48,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:36:48,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539136409] [2023-08-29 22:36:48,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539136409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:36:48,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:36:48,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:36:48,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727796881] [2023-08-29 22:36:48,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:36:48,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:36:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:36:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:36:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:36:49,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-29 22:36:49,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 22:36:49,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:36:49,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-29 22:36:49,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:36:53,823 INFO L130 PetriNetUnfolder]: 39519/54963 cut-off events. [2023-08-29 22:36:53,823 INFO L131 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2023-08-29 22:36:53,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110205 conditions, 54963 events. 39519/54963 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 2965. Compared 352493 event pairs, 33456 based on Foata normal form. 0/19634 useless extension candidates. Maximal degree in co-relation 110192. Up to 54543 conditions per place. [2023-08-29 22:36:54,032 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 91 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-08-29 22:36:54,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 555 flow [2023-08-29 22:36:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:36:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:36:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-29 22:36:54,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2023-08-29 22:36:54,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-29 22:36:54,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-29 22:36:54,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:54,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-29 22:36:54,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 22:36:54,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:54,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:54,044 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 391 flow. Second operand 3 states and 1048 transitions. [2023-08-29 22:36:54,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 555 flow [2023-08-29 22:36:54,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 525 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 22:36:54,048 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 343 flow [2023-08-29 22:36:54,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-08-29 22:36:54,048 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-08-29 22:36:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 343 flow [2023-08-29 22:36:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 22:36:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:36:54,059 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 22:36:54,258 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 22:36:54,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:36:54,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash 44848309, now seen corresponding path program 1 times [2023-08-29 22:36:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:36:54,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125534056] [2023-08-29 22:36:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:54,260 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 22:36:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:36:54,261 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 22:36:54,263 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 22:36:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:54,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 22:36:54,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:36:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:54,417 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 22:36:54,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 22:36:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:36:54,655 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 22:36:54,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 22:36:54,906 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-29 22:36:54,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 76 [2023-08-29 22:36:55,278 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 22:36:55,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:36:55,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:36:55,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125534056] [2023-08-29 22:36:55,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125534056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:36:55,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:36:55,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:36:55,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054694196] [2023-08-29 22:36:55,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:36:55,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:36:55,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:36:55,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:36:55,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:36:56,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-29 22:36:56,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 22:36:56,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:36:56,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-29 22:36:56,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:36:59,559 INFO L130 PetriNetUnfolder]: 27484/39019 cut-off events. [2023-08-29 22:36:59,559 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-08-29 22:36:59,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78375 conditions, 39019 events. 27484/39019 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2024. Compared 249387 event pairs, 23103 based on Foata normal form. 0/15833 useless extension candidates. Maximal degree in co-relation 78361. Up to 38683 conditions per place. [2023-08-29 22:36:59,711 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 87 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-29 22:36:59,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 499 flow [2023-08-29 22:36:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:36:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:36:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2023-08-29 22:36:59,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447278911564626 [2023-08-29 22:36:59,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2023-08-29 22:36:59,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2023-08-29 22:36:59,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:59,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2023-08-29 22:36:59,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 22:36:59,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:59,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:36:59,722 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 343 flow. Second operand 3 states and 1046 transitions. [2023-08-29 22:36:59,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 499 flow [2023-08-29 22:36:59,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:36:59,725 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 324 flow [2023-08-29 22:36:59,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2023-08-29 22:36:59,726 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-08-29 22:36:59,726 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 324 flow [2023-08-29 22:36:59,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 22:36:59,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:59,727 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:36:59,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:36:59,935 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 22:36:59,936 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:36:59,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 100935555, now seen corresponding path program 2 times [2023-08-29 22:36:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:36:59,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404968352] [2023-08-29 22:36:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:36:59,937 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 22:36:59,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:36:59,938 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 22:36:59,940 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 22:37:00,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:37:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:37:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:37:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:00,113 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:37:00,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:37:00,245 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 22:37:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:37:00,816 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 22:37:00,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:00,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404968352] [2023-08-29 22:37:00,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404968352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:37:00,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:37:00,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:37:00,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68983538] [2023-08-29 22:37:00,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:37:00,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:37:00,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:37:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:37:06,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 784 [2023-08-29 22:37:06,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states 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 22:37:06,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:06,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 784 [2023-08-29 22:37:06,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:09,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:11,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:12,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:14,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:16,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:18,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:19,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:21,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:22,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:24,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:25,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:27,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:28,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:30,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:32,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:34,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:47,820 INFO L130 PetriNetUnfolder]: 82437/117023 cut-off events. [2023-08-29 22:37:47,820 INFO L131 PetriNetUnfolder]: For 810/810 co-relation queries the response was YES. [2023-08-29 22:37:48,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234962 conditions, 117023 events. 82437/117023 cut-off events. For 810/810 co-relation queries the response was YES. Maximal size of possible extension queue 4208. Compared 822193 event pairs, 69309 based on Foata normal form. 17/48594 useless extension candidates. Maximal degree in co-relation 234947. Up to 12907 conditions per place. [2023-08-29 22:37:48,344 INFO L137 encePairwiseOnDemand]: 774/784 looper letters, 521 selfloop transitions, 51 changer transitions 0/573 dead transitions. [2023-08-29 22:37:48,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 573 transitions, 2628 flow [2023-08-29 22:37:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:37:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:37:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4273 transitions. [2023-08-29 22:37:48,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454187925170068 [2023-08-29 22:37:48,354 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4273 transitions. [2023-08-29 22:37:48,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4273 transitions. [2023-08-29 22:37:48,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:48,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4273 transitions. [2023-08-29 22:37:48,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 356.0833333333333) internal successors, (4273), 12 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states 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 22:37:48,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 784.0) internal successors, (10192), 13 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states 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 22:37:48,376 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 784.0) internal successors, (10192), 13 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states 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 22:37:48,376 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 324 flow. Second operand 12 states and 4273 transitions. [2023-08-29 22:37:48,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 573 transitions, 2628 flow [2023-08-29 22:37:48,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 573 transitions, 2627 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:48,385 INFO L231 Difference]: Finished difference. Result has 94 places, 119 transitions, 701 flow [2023-08-29 22:37:48,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=701, PETRI_PLACES=94, PETRI_TRANSITIONS=119} [2023-08-29 22:37:48,386 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-08-29 22:37:48,386 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 119 transitions, 701 flow [2023-08-29 22:37:48,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states 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 22:37:48,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:48,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:37:48,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:48,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:37:48,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash 149582333, now seen corresponding path program 1 times [2023-08-29 22:37:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:48,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063398153] [2023-08-29 22:37:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:48,598 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 22:37:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:48,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:48,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:37:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:37:48,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:48,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:48,793 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-29 22:37:48,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-29 22:37:48,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-29 22:37:48,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:48,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:37:48,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:48,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:37:49,148 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 22:37:49,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:49,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063398153] [2023-08-29 22:37:49,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063398153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:49,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:49,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:37:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607756051] [2023-08-29 22:37:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:37:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:37:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:37:49,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-29 22:37:49,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 119 transitions, 701 flow. Second operand has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:49,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:49,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-29 22:37:49,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:59,396 INFO L130 PetriNetUnfolder]: 80601/114242 cut-off events. [2023-08-29 22:37:59,396 INFO L131 PetriNetUnfolder]: For 840/840 co-relation queries the response was YES. [2023-08-29 22:37:59,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229515 conditions, 114242 events. 80601/114242 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 3846. Compared 800243 event pairs, 67734 based on Foata normal form. 0/46875 useless extension candidates. Maximal degree in co-relation 229492. Up to 113234 conditions per place. [2023-08-29 22:38:00,275 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 115 selfloop transitions, 1 changer transitions 0/117 dead transitions. [2023-08-29 22:38:00,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 929 flow [2023-08-29 22:38:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-29 22:38:00,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2023-08-29 22:38:00,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-29 22:38:00,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-29 22:38:00,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:00,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-29 22:38:00,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states 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 22:38:00,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:38:00,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:38:00,286 INFO L175 Difference]: Start difference. First operand has 94 places, 119 transitions, 701 flow. Second operand 3 states and 1044 transitions. [2023-08-29 22:38:00,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 929 flow [2023-08-29 22:38:00,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 834 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-29 22:38:00,291 INFO L231 Difference]: Finished difference. Result has 90 places, 117 transitions, 604 flow [2023-08-29 22:38:00,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=604, PETRI_PLACES=90, PETRI_TRANSITIONS=117} [2023-08-29 22:38:00,292 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2023-08-29 22:38:00,292 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 117 transitions, 604 flow [2023-08-29 22:38:00,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:00,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:00,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:38:00,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:00,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:00,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:00,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash 149582335, now seen corresponding path program 1 times [2023-08-29 22:38:00,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:00,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305527611] [2023-08-29 22:38:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:00,509 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 22:38:00,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:00,510 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:00,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:38:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:00,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:38:00,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:00,703 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 22:38:00,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 22:38:00,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:00,930 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-29 22:38:00,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 22:38:01,093 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-29 22:38:01,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-29 22:38:01,198 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 22:38:01,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:01,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305527611] [2023-08-29 22:38:01,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305527611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:01,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:01,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295959547] [2023-08-29 22:38:01,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:01,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:01,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:01,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:01,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:01,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-29 22:38:01,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 117 transitions, 604 flow. Second operand has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:01,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:01,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-29 22:38:01,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:12,219 INFO L130 PetriNetUnfolder]: 78765/111461 cut-off events. [2023-08-29 22:38:12,219 INFO L131 PetriNetUnfolder]: For 862/862 co-relation queries the response was YES. [2023-08-29 22:38:12,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223896 conditions, 111461 events. 78765/111461 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 3730. Compared 774575 event pairs, 66159 based on Foata normal form. 0/46283 useless extension candidates. Maximal degree in co-relation 223872. Up to 110453 conditions per place. [2023-08-29 22:38:12,844 INFO L137 encePairwiseOnDemand]: 781/784 looper letters, 113 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-08-29 22:38:12,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 828 flow [2023-08-29 22:38:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:38:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:38:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1042 transitions. [2023-08-29 22:38:12,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44302721088435376 [2023-08-29 22:38:12,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1042 transitions. [2023-08-29 22:38:12,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1042 transitions. [2023-08-29 22:38:12,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:12,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1042 transitions. [2023-08-29 22:38:12,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states 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 22:38:12,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:38:12,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 784.0) internal successors, (3136), 4 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 22:38:12,852 INFO L175 Difference]: Start difference. First operand has 90 places, 117 transitions, 604 flow. Second operand 3 states and 1042 transitions. [2023-08-29 22:38:12,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 828 flow [2023-08-29 22:38:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 827 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:12,857 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 601 flow [2023-08-29 22:38:12,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=601, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2023-08-29 22:38:12,858 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 8 predicate places. [2023-08-29 22:38:12,858 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 601 flow [2023-08-29 22:38:12,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:12,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:12,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:12,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:13,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:13,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 342082193, now seen corresponding path program 1 times [2023-08-29 22:38:13,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:13,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284964948] [2023-08-29 22:38:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:13,074 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 22:38:13,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:13,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:13,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:38:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:38:13,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:13,217 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 22:38:13,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:13,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:13,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284964948] [2023-08-29 22:38:13,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284964948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:13,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:13,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:13,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126490718] [2023-08-29 22:38:13,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:13,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:13,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:13,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 784 [2023-08-29 22:38:13,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states 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 22:38:13,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:13,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 784 [2023-08-29 22:38:13,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:26,355 INFO L130 PetriNetUnfolder]: 95949/137029 cut-off events. [2023-08-29 22:38:26,355 INFO L131 PetriNetUnfolder]: For 938/938 co-relation queries the response was YES. [2023-08-29 22:38:26,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275469 conditions, 137029 events. 95949/137029 cut-off events. For 938/938 co-relation queries the response was YES. Maximal size of possible extension queue 4562. Compared 1000713 event pairs, 68697 based on Foata normal form. 0/61825 useless extension candidates. Maximal degree in co-relation 275444. Up to 110452 conditions per place. [2023-08-29 22:38:27,124 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 215 selfloop transitions, 4 changer transitions 0/220 dead transitions. [2023-08-29 22:38:27,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 220 transitions, 1478 flow [2023-08-29 22:38:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:38:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:38:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1727 transitions. [2023-08-29 22:38:27,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405612244897959 [2023-08-29 22:38:27,127 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1727 transitions. [2023-08-29 22:38:27,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1727 transitions. [2023-08-29 22:38:27,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:27,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1727 transitions. [2023-08-29 22:38:27,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 345.4) internal successors, (1727), 5 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states 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 22:38:27,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states 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 22:38:27,135 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states 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 22:38:27,135 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 601 flow. Second operand 5 states and 1727 transitions. [2023-08-29 22:38:27,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 220 transitions, 1478 flow [2023-08-29 22:38:27,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 220 transitions, 1477 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:27,141 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 625 flow [2023-08-29 22:38:27,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=625, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2023-08-29 22:38:27,142 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-08-29 22:38:27,142 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 625 flow [2023-08-29 22:38:27,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states 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 22:38:27,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:27,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:27,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-29 22:38:27,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:27,351 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:27,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash -276993847, now seen corresponding path program 1 times [2023-08-29 22:38:27,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:27,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499028386] [2023-08-29 22:38:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:27,352 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 22:38:27,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:27,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:27,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:38:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:38:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:27,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:27,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:27,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499028386] [2023-08-29 22:38:27,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499028386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:27,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:27,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:38:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417989290] [2023-08-29 22:38:27,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:27,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:27,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 784 [2023-08-29 22:38:27,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 625 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states 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 22:38:27,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:27,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 784 [2023-08-29 22:38:27,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:44,779 INFO L130 PetriNetUnfolder]: 130295/188263 cut-off events. [2023-08-29 22:38:44,779 INFO L131 PetriNetUnfolder]: For 20803/20803 co-relation queries the response was YES. [2023-08-29 22:38:45,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401902 conditions, 188263 events. 130295/188263 cut-off events. For 20803/20803 co-relation queries the response was YES. Maximal size of possible extension queue 6213. Compared 1470330 event pairs, 86211 based on Foata normal form. 2124/94825 useless extension candidates. Maximal degree in co-relation 401874. Up to 135937 conditions per place. [2023-08-29 22:38:46,014 INFO L137 encePairwiseOnDemand]: 775/784 looper letters, 183 selfloop transitions, 15 changer transitions 0/199 dead transitions. [2023-08-29 22:38:46,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 199 transitions, 1290 flow [2023-08-29 22:38:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:38:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:38:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1724 transitions. [2023-08-29 22:38:46,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43979591836734694 [2023-08-29 22:38:46,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1724 transitions. [2023-08-29 22:38:46,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1724 transitions. [2023-08-29 22:38:46,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:46,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1724 transitions. [2023-08-29 22:38:46,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 344.8) internal successors, (1724), 5 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states 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 22:38:46,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states 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 22:38:46,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 784.0) internal successors, (4704), 6 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states 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 22:38:46,023 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 625 flow. Second operand 5 states and 1724 transitions. [2023-08-29 22:38:46,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 199 transitions, 1290 flow [2023-08-29 22:38:46,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 199 transitions, 1284 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:38:46,143 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 678 flow [2023-08-29 22:38:46,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=784, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=678, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2023-08-29 22:38:46,144 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2023-08-29 22:38:46,144 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 678 flow [2023-08-29 22:38:46,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states 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 22:38:46,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:46,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:46,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:46,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:46,354 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 22:38:46,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2014734433, now seen corresponding path program 1 times [2023-08-29 22:38:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468389987] [2023-08-29 22:38:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:46,355 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 22:38:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:46,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:46,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:38:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:38:46,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,583 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:38:46,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 22:38:46,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 22:38:46,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:46,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:46,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:46,901 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 22:38:46,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:46,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:46,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468389987] [2023-08-29 22:38:46,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468389987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:46,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:46,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:46,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021087970] [2023-08-29 22:38:46,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:46,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:46,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:46,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:46,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:47,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 784 [2023-08-29 22:38:47,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 678 flow. Second operand has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 22:38:47,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:47,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 784 [2023-08-29 22:38:47,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand