./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:38:46,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:38:46,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:38:46,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:38:46,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:38:46,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:38:46,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:38:46,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:38:46,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:38:46,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:38:46,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:38:46,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:38:46,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:38:46,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:38:46,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:38:46,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:38:46,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:38:46,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:38:46,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:38:46,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:38:46,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:38:46,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:38:46,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:38:46,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:38:46,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:38:46,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:38:46,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:38:46,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:38:46,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:38:46,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:38:46,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:38:46,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:38:46,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:38:46,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:38:46,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:38:46,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:38:46,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:38:46,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:38:46,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:38:46,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:38:46,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:38:46,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:38:46,826 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:38:46,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:38:46,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:38:46,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:38:46,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:38:46,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:38:46,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:38:46,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:38:46,829 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:38:46,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:38:46,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:38:46,830 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:38:46,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:38:46,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:38:46,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:38:46,830 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:38:46,830 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:38:46,830 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:38:46,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:38:46,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:38:46,831 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:38:46,831 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:38:46,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:38:46,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:38:46,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:38:46,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:38:46,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:38:46,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:38:46,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:38:46,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:38:46,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:38:46,833 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:38:46,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:38:46,833 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:38:46,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:38:47,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:38:47,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:38:47,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:38:47,093 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:38:47,094 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:38:47,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-09-01 02:38:48,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:38:48,399 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:38:48,400 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-09-01 02:38:48,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1cb7bcc/2a9b8c30e8494bd2bbab6edd505addd6/FLAG1e627d78a [2023-09-01 02:38:48,414 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1cb7bcc/2a9b8c30e8494bd2bbab6edd505addd6 [2023-09-01 02:38:48,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:38:48,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:38:48,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:48,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:38:48,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:38:48,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:48" (1/1) ... [2023-09-01 02:38:48,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c3bd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:48, skipping insertion in model container [2023-09-01 02:38:48,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:48" (1/1) ... [2023-09-01 02:38:48,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:38:48,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:38:48,549 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-09-01 02:38:48,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:48,567 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) [2023-09-01 02:38:48,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65b2760f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:48, skipping insertion in model container [2023-09-01 02:38:48,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:48,567 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:38:48,568 INFO L158 Benchmark]: Toolchain (without parser) took 151.04ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 40.7MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:38:48,569 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:38:48,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.72ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 40.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:38:48,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.72ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 40.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 163]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:38:50,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:38:50,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:38:50,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:38:50,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:38:50,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:38:50,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:38:50,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:38:50,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:38:50,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:38:50,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:38:50,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:38:50,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:38:50,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:38:50,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:38:50,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:38:50,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:38:50,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:38:50,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:38:50,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:38:50,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:38:50,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:38:50,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:38:50,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:38:50,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:38:50,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:38:50,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:38:50,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:38:50,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:38:50,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:38:50,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:38:50,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:38:50,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:38:50,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:38:50,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:38:50,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:38:50,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:38:50,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:38:50,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:38:50,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:38:50,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:38:50,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:38:50,328 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:38:50,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:38:50,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:38:50,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:38:50,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:38:50,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:38:50,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:38:50,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:38:50,331 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:38:50,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:38:50,332 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:38:50,332 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:38:50,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:38:50,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:38:50,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:38:50,333 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:38:50,333 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:38:50,333 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:38:50,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:38:50,333 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:38:50,334 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:38:50,334 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:38:50,334 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:38:50,334 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:38:50,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:38:50,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:38:50,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:38:50,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:38:50,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:38:50,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:38:50,335 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:38:50,335 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:38:50,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:38:50,336 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:38:50,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:38:50,336 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:38:50,336 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:38:50,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:38:50,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:38:50,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:38:50,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:38:50,602 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:38:50,602 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:38:50,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-09-01 02:38:51,620 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:38:51,830 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:38:51,831 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-09-01 02:38:51,850 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f31dab21/4dd3e5a417a7458babf30cf071a498b3/FLAG70fc71440 [2023-09-01 02:38:51,869 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f31dab21/4dd3e5a417a7458babf30cf071a498b3 [2023-09-01 02:38:51,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:38:51,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:38:51,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:51,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:38:51,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:38:51,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:51" (1/1) ... [2023-09-01 02:38:51,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d01d389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:51, skipping insertion in model container [2023-09-01 02:38:51,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:38:51" (1/1) ... [2023-09-01 02:38:51,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:38:51,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:38:52,062 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-09-01 02:38:52,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:52,081 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:38:52,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:38:52,103 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-09-01 02:38:52,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:52,120 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:38:52,144 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-09-01 02:38:52,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:38:52,163 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:38:52,163 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:38:52,168 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:38:52,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52 WrapperNode [2023-09-01 02:38:52,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:38:52,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:38:52,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:38:52,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:38:52,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,222 INFO L138 Inliner]: procedures = 28, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 317 [2023-09-01 02:38:52,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:38:52,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:38:52,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:38:52,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:38:52,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,255 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:38:52,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:38:52,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:38:52,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:38:52,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (1/1) ... [2023-09-01 02:38:52,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:38:52,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:38:52,289 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) [2023-09-01 02:38:52,301 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 [2023-09-01 02:38:52,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:38:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:38:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:38:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:38:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:38:52,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:38:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:38:52,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:38:52,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:38:52,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:38:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:38:52,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:38:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:38:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:38:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:38:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:38:52,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:38:52,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:38:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:38:52,317 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:38:52,462 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:38:52,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:38:52,977 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:38:53,130 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:38:53,130 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 02:38:53,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:38:53 BoogieIcfgContainer [2023-09-01 02:38:53,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:38:53,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:38:53,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:38:53,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:38:53,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:38:51" (1/3) ... [2023-09-01 02:38:53,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7426e949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:38:53, skipping insertion in model container [2023-09-01 02:38:53,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:38:52" (2/3) ... [2023-09-01 02:38:53,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7426e949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:38:53, skipping insertion in model container [2023-09-01 02:38:53,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:38:53" (3/3) ... [2023-09-01 02:38:53,139 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-09-01 02:38:53,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:38:53,149 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 02:38:53,149 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:38:53,225 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 02:38:53,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 260 transitions, 552 flow [2023-09-01 02:38:53,314 INFO L130 PetriNetUnfolder]: 19/256 cut-off events. [2023-09-01 02:38:53,314 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:38:53,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 256 events. 19/256 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 206. Up to 2 conditions per place. [2023-09-01 02:38:53,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 260 transitions, 552 flow [2023-09-01 02:38:53,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 252 transitions, 528 flow [2023-09-01 02:38:53,324 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:38:53,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 252 transitions, 528 flow [2023-09-01 02:38:53,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 252 transitions, 528 flow [2023-09-01 02:38:53,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 252 transitions, 528 flow [2023-09-01 02:38:53,362 INFO L130 PetriNetUnfolder]: 19/252 cut-off events. [2023-09-01 02:38:53,362 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:38:53,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 252 events. 19/252 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 206. Up to 2 conditions per place. [2023-09-01 02:38:53,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 3392 [2023-09-01 02:39:18,915 INFO L134 LiptonReduction]: Checked pairs total: 7113 [2023-09-01 02:39:18,926 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-09-01 02:39:18,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:39:18,951 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;@398e238b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:39:18,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-09-01 02:39:18,962 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:39:18,962 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:39:18,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:18,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:39:18,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:18,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 37953, now seen corresponding path program 1 times [2023-09-01 02:39:18,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:18,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705419871] [2023-09-01 02:39:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:18,982 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 [2023-09-01 02:39:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:18,985 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) [2023-09-01 02:39:18,990 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 [2023-09-01 02:39:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:39:19,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:19,269 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 02:39:19,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 02:39:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:19,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:19,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705419871] [2023-09-01 02:39:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705419871] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:19,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:19,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:19,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859683442] [2023-09-01 02:39:19,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:19,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:19,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:19,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 517 [2023-09-01 02:39:19,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:19,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:19,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 517 [2023-09-01 02:39:19,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:21,871 INFO L130 PetriNetUnfolder]: 21072/26499 cut-off events. [2023-09-01 02:39:21,872 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2023-09-01 02:39:21,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53205 conditions, 26499 events. 21072/26499 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 1976. Compared 137726 event pairs, 14510 based on Foata normal form. 0/8208 useless extension candidates. Maximal degree in co-relation 47480. Up to 26073 conditions per place. [2023-09-01 02:39:22,109 INFO L137 encePairwiseOnDemand]: 513/517 looper letters, 56 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-09-01 02:39:22,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 264 flow [2023-09-01 02:39:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-09-01 02:39:22,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44874274661508706 [2023-09-01 02:39:22,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-09-01 02:39:22,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-09-01 02:39:22,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:22,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-09-01 02:39:22,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:22,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:22,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:22,156 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 156 flow. Second operand 3 states and 696 transitions. [2023-09-01 02:39:22,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 264 flow [2023-09-01 02:39:22,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 02:39:22,222 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 136 flow [2023-09-01 02:39:22,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2023-09-01 02:39:22,227 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-09-01 02:39:22,227 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 136 flow [2023-09-01 02:39:22,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:22,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:22,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:39:22,238 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 [2023-09-01 02:39:22,438 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 [2023-09-01 02:39:22,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:22,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 37954, now seen corresponding path program 1 times [2023-09-01 02:39:22,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:22,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946463168] [2023-09-01 02:39:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:22,445 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 [2023-09-01 02:39:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:22,446 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) [2023-09-01 02:39:22,449 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 [2023-09-01 02:39:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:39:22,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:22,740 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:39:22,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:39:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:22,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:22,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:22,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946463168] [2023-09-01 02:39:22,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946463168] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:22,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:22,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:22,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491295451] [2023-09-01 02:39:22,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:22,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:22,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:22,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 517 [2023-09-01 02:39:22,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:22,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:22,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 517 [2023-09-01 02:39:22,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:26,999 INFO L130 PetriNetUnfolder]: 42143/52995 cut-off events. [2023-09-01 02:39:26,999 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:39:27,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105588 conditions, 52995 events. 42143/52995 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3700. Compared 296944 event pairs, 29020 based on Foata normal form. 0/16883 useless extension candidates. Maximal degree in co-relation 105582. Up to 26074 conditions per place. [2023-09-01 02:39:27,332 INFO L137 encePairwiseOnDemand]: 511/517 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-09-01 02:39:27,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 474 flow [2023-09-01 02:39:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-09-01 02:39:27,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829142488716957 [2023-09-01 02:39:27,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-09-01 02:39:27,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-09-01 02:39:27,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:27,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-09-01 02:39:27,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:27,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:27,339 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:27,340 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 136 flow. Second operand 3 states and 749 transitions. [2023-09-01 02:39:27,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 474 flow [2023-09-01 02:39:27,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:27,343 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 167 flow [2023-09-01 02:39:27,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-09-01 02:39:27,344 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2023-09-01 02:39:27,344 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 167 flow [2023-09-01 02:39:27,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:27,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:27,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:39:27,365 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 [2023-09-01 02:39:27,552 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 [2023-09-01 02:39:27,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:27,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1178785, now seen corresponding path program 1 times [2023-09-01 02:39:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:27,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115884020] [2023-09-01 02:39:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:27,559 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 [2023-09-01 02:39:27,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:27,560 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) [2023-09-01 02:39:27,562 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 [2023-09-01 02:39:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:39:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:27,737 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:39:27,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:39:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:27,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:39:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:27,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115884020] [2023-09-01 02:39:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115884020] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:39:27,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:39:27,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:39:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409066763] [2023-09-01 02:39:27,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:39:27,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:39:27,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:39:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:39:28,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 517 [2023-09-01 02:39:28,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:28,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:28,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 517 [2023-09-01 02:39:28,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:35,135 INFO L130 PetriNetUnfolder]: 63222/79503 cut-off events. [2023-09-01 02:39:35,135 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:39:35,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158427 conditions, 79503 events. 63222/79503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5300. Compared 461034 event pairs, 43530 based on Foata normal form. 0/25662 useless extension candidates. Maximal degree in co-relation 158418. Up to 26075 conditions per place. [2023-09-01 02:39:35,530 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 158 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2023-09-01 02:39:35,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 183 transitions, 795 flow [2023-09-01 02:39:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:39:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:39:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1395 transitions. [2023-09-01 02:39:35,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497098646034816 [2023-09-01 02:39:35,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1395 transitions. [2023-09-01 02:39:35,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1395 transitions. [2023-09-01 02:39:35,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:35,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1395 transitions. [2023-09-01 02:39:35,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.5) internal successors, (1395), 6 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:35,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:35,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:35,544 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 167 flow. Second operand 6 states and 1395 transitions. [2023-09-01 02:39:35,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 183 transitions, 795 flow [2023-09-01 02:39:35,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 183 transitions, 781 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:39:35,546 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 304 flow [2023-09-01 02:39:35,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-09-01 02:39:35,547 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2023-09-01 02:39:35,547 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 304 flow [2023-09-01 02:39:35,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:35,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:35,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:39:35,556 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 [2023-09-01 02:39:35,755 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 [2023-09-01 02:39:35,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:35,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1180458, now seen corresponding path program 1 times [2023-09-01 02:39:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:35,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228474345] [2023-09-01 02:39:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:35,757 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 [2023-09-01 02:39:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:35,758 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) [2023-09-01 02:39:35,762 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 [2023-09-01 02:39:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:39:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:35,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:35,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:35,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:35,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:35,972 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-09-01 02:39:35,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-09-01 02:39:36,016 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-09-01 02:39:36,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 162 [2023-09-01 02:39:36,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:36,100 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 [2023-09-01 02:39:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:36,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:36,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228474345] [2023-09-01 02:39:36,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228474345] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:36,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:36,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:39:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741006488] [2023-09-01 02:39:36,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:36,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:39:36,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:39:36,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:39:36,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-09-01 02:39:36,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:36,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:36,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-09-01 02:39:36,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:40,816 INFO L130 PetriNetUnfolder]: 50800/64378 cut-off events. [2023-09-01 02:39:40,816 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:39:40,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128225 conditions, 64378 events. 50800/64378 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4120. Compared 374338 event pairs, 34710 based on Foata normal form. 0/21127 useless extension candidates. Maximal degree in co-relation 128212. Up to 63100 conditions per place. [2023-09-01 02:39:41,140 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 70 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-09-01 02:39:41,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 426 flow [2023-09-01 02:39:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-09-01 02:39:41,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564796905222437 [2023-09-01 02:39:41,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-09-01 02:39:41,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-09-01 02:39:41,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:41,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-09-01 02:39:41,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:41,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:41,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:41,147 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 304 flow. Second operand 3 states and 708 transitions. [2023-09-01 02:39:41,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 426 flow [2023-09-01 02:39:41,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 407 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:41,154 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 267 flow [2023-09-01 02:39:41,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-09-01 02:39:41,156 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-09-01 02:39:41,156 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 267 flow [2023-09-01 02:39:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:41,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:41,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:39:41,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-09-01 02:39:41,364 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 [2023-09-01 02:39:41,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:41,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1180459, now seen corresponding path program 1 times [2023-09-01 02:39:41,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:41,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465902343] [2023-09-01 02:39:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:41,368 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 [2023-09-01 02:39:41,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:41,369 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) [2023-09-01 02:39:41,370 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 [2023-09-01 02:39:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 02:39:41,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:41,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:41,595 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-09-01 02:39:41,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-09-01 02:39:42,583 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-09-01 02:39:42,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2023-09-01 02:39:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:43,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:43,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:43,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465902343] [2023-09-01 02:39:43,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465902343] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:43,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:43,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:43,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085723341] [2023-09-01 02:39:43,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:43,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:43,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:43,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 517 [2023-09-01 02:39:43,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:43,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:43,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 517 [2023-09-01 02:39:43,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:47,362 INFO L130 PetriNetUnfolder]: 38378/49253 cut-off events. [2023-09-01 02:39:47,362 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:39:47,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97956 conditions, 49253 events. 38378/49253 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2963. Compared 287803 event pairs, 25890 based on Foata normal form. 0/17887 useless extension candidates. Maximal degree in co-relation 97942. Up to 47975 conditions per place. [2023-09-01 02:39:47,614 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 66 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-09-01 02:39:47,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 381 flow [2023-09-01 02:39:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-09-01 02:39:47,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513217279174726 [2023-09-01 02:39:47,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-09-01 02:39:47,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-09-01 02:39:47,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:47,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-09-01 02:39:47,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,621 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 267 flow. Second operand 3 states and 700 transitions. [2023-09-01 02:39:47,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 381 flow [2023-09-01 02:39:47,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:47,623 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 248 flow [2023-09-01 02:39:47,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-09-01 02:39:47,625 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2023-09-01 02:39:47,625 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 248 flow [2023-09-01 02:39:47,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:47,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:47,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:39:47,637 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 [2023-09-01 02:39:47,832 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 [2023-09-01 02:39:47,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:47,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1134447939, now seen corresponding path program 1 times [2023-09-01 02:39:47,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:47,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609416191] [2023-09-01 02:39:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:47,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:47,835 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) [2023-09-01 02:39:47,842 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 [2023-09-01 02:39:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:39:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:47,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:48,028 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-09-01 02:39:48,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-09-01 02:39:48,756 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2023-09-01 02:39:48,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2023-09-01 02:39:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:49,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:49,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:49,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609416191] [2023-09-01 02:39:49,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609416191] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:49,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:49,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:49,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263732881] [2023-09-01 02:39:49,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:49,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:49,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:49,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 517 [2023-09-01 02:39:49,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:49,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:49,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 517 [2023-09-01 02:39:49,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:52,819 INFO L130 PetriNetUnfolder]: 36959/47366 cut-off events. [2023-09-01 02:39:52,820 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:39:52,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94183 conditions, 47366 events. 36959/47366 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2853. Compared 274590 event pairs, 24783 based on Foata normal form. 0/17476 useless extension candidates. Maximal degree in co-relation 94168. Up to 46088 conditions per place. [2023-09-01 02:39:53,116 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-09-01 02:39:53,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 374 flow [2023-09-01 02:39:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-09-01 02:39:53,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45003223726627983 [2023-09-01 02:39:53,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-09-01 02:39:53,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-09-01 02:39:53,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:53,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-09-01 02:39:53,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,137 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 248 flow. Second operand 3 states and 698 transitions. [2023-09-01 02:39:53,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 374 flow [2023-09-01 02:39:53,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:53,139 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 245 flow [2023-09-01 02:39:53,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=245, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-09-01 02:39:53,139 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2023-09-01 02:39:53,140 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 245 flow [2023-09-01 02:39:53,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:53,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:39:53,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-09-01 02:39:53,347 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 [2023-09-01 02:39:53,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:53,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1134447938, now seen corresponding path program 1 times [2023-09-01 02:39:53,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:53,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635920022] [2023-09-01 02:39:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:53,348 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 [2023-09-01 02:39:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:53,350 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) [2023-09-01 02:39:53,351 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 [2023-09-01 02:39:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:39:53,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,543 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-09-01 02:39:53,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-09-01 02:39:53,564 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:39:53,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-09-01 02:39:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:39:53,607 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 [2023-09-01 02:39:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:53,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:39:53,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:53,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635920022] [2023-09-01 02:39:53,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635920022] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:53,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:53,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:39:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721177677] [2023-09-01 02:39:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:53,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:39:53,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:39:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:39:53,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-09-01 02:39:53,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:53,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:53,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-09-01 02:39:53,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:57,317 INFO L130 PetriNetUnfolder]: 35540/45479 cut-off events. [2023-09-01 02:39:57,318 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:39:57,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90410 conditions, 45479 events. 35540/45479 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2743. Compared 261477 event pairs, 23676 based on Foata normal form. 0/17065 useless extension candidates. Maximal degree in co-relation 90394. Up to 44201 conditions per place. [2023-09-01 02:39:57,612 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-09-01 02:39:57,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 367 flow [2023-09-01 02:39:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-09-01 02:39:57,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526112185686654 [2023-09-01 02:39:57,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-09-01 02:39:57,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-09-01 02:39:57,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:57,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-09-01 02:39:57,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:57,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:57,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:57,621 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 245 flow. Second operand 3 states and 702 transitions. [2023-09-01 02:39:57,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 367 flow [2023-09-01 02:39:57,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:57,624 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 242 flow [2023-09-01 02:39:57,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2023-09-01 02:39:57,624 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-09-01 02:39:57,624 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 242 flow [2023-09-01 02:39:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:57,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:57,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:39:57,640 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 [2023-09-01 02:39:57,832 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 [2023-09-01 02:39:57,832 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:39:57,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash 759641090, now seen corresponding path program 2 times [2023-09-01 02:39:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:39:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871710005] [2023-09-01 02:39:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:39:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:39:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:39:57,837 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) [2023-09-01 02:39:57,839 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 [2023-09-01 02:39:57,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:39:57,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:39:57,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:39:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:39:58,074 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:39:58,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:39:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:58,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:39:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:58,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:39:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871710005] [2023-09-01 02:39:58,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871710005] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:39:58,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:39:58,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:39:58,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334823358] [2023-09-01 02:39:58,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:39:58,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:39:58,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:39:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:39:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:40:02,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 517 [2023-09-01 02:40:02,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 242 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:02,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:02,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 517 [2023-09-01 02:40:02,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:04,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:06,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:07,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:09,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:10,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:13,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:40:27,786 INFO L130 PetriNetUnfolder]: 118453/151567 cut-off events. [2023-09-01 02:40:27,786 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 02:40:28,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301214 conditions, 151567 events. 118453/151567 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 5792. Compared 949479 event pairs, 78920 based on Foata normal form. 12/59436 useless extension candidates. Maximal degree in co-relation 301197. Up to 14739 conditions per place. [2023-09-01 02:40:28,752 INFO L137 encePairwiseOnDemand]: 510/517 looper letters, 435 selfloop transitions, 32 changer transitions 0/473 dead transitions. [2023-09-01 02:40:28,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 473 transitions, 2160 flow [2023-09-01 02:40:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:40:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:40:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2927 transitions. [2023-09-01 02:40:28,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471792392005158 [2023-09-01 02:40:28,776 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2927 transitions. [2023-09-01 02:40:28,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2927 transitions. [2023-09-01 02:40:28,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:28,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2927 transitions. [2023-09-01 02:40:28,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.91666666666666) internal successors, (2927), 12 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:28,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:28,788 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:28,789 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 242 flow. Second operand 12 states and 2927 transitions. [2023-09-01 02:40:28,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 473 transitions, 2160 flow [2023-09-01 02:40:28,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 473 transitions, 2159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:28,793 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 485 flow [2023-09-01 02:40:28,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=485, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2023-09-01 02:40:28,794 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-09-01 02:40:28,794 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 485 flow [2023-09-01 02:40:28,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:28,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:28,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:40:28,817 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 [2023-09-01 02:40:29,002 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 [2023-09-01 02:40:29,003 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:40:29,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:29,006 INFO L85 PathProgramCache]: Analyzing trace with hash 808140640, now seen corresponding path program 1 times [2023-09-01 02:40:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:29,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337903128] [2023-09-01 02:40:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:29,008 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 [2023-09-01 02:40:29,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:29,009 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) [2023-09-01 02:40:29,011 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 [2023-09-01 02:40:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:29,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:40:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:29,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:29,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337903128] [2023-09-01 02:40:29,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337903128] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:29,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:29,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158573466] [2023-09-01 02:40:29,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:40:29,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:40:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:40:29,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 517 [2023-09-01 02:40:29,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:29,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:29,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 517 [2023-09-01 02:40:29,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:43,250 INFO L130 PetriNetUnfolder]: 132714/171900 cut-off events. [2023-09-01 02:40:43,251 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-09-01 02:40:43,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341818 conditions, 171900 events. 132714/171900 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 7032. Compared 1135461 event pairs, 89640 based on Foata normal form. 0/70959 useless extension candidates. Maximal degree in co-relation 341793. Up to 147306 conditions per place. [2023-09-01 02:40:44,605 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 130 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2023-09-01 02:40:44,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 139 transitions, 982 flow [2023-09-01 02:40:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:40:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:40:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 951 transitions. [2023-09-01 02:40:44,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598646034816248 [2023-09-01 02:40:44,608 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 951 transitions. [2023-09-01 02:40:44,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 951 transitions. [2023-09-01 02:40:44,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:44,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 951 transitions. [2023-09-01 02:40:44,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:44,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:44,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:44,614 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 485 flow. Second operand 4 states and 951 transitions. [2023-09-01 02:40:44,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 139 transitions, 982 flow [2023-09-01 02:40:44,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 899 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 02:40:44,619 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 445 flow [2023-09-01 02:40:44,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=445, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2023-09-01 02:40:44,620 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-09-01 02:40:44,620 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 445 flow [2023-09-01 02:40:44,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:44,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:44,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:44,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:40:44,830 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 [2023-09-01 02:40:44,831 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:40:44,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2122539070, now seen corresponding path program 1 times [2023-09-01 02:40:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:44,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673658616] [2023-09-01 02:40:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:44,832 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 [2023-09-01 02:40:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:44,833 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) [2023-09-01 02:40:44,837 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 [2023-09-01 02:40:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:40:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:45,039 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 02:40:45,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 02:40:45,062 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:40:45,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:40:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:40:45,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:40:45,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:40:45,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673658616] [2023-09-01 02:40:45,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673658616] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:45,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:45,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:40:45,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249365070] [2023-09-01 02:40:45,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:45,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:40:45,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:40:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:40:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:40:45,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 517 [2023-09-01 02:40:45,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 445 flow. Second operand has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:45,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:45,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 517 [2023-09-01 02:40:45,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:55,570 INFO L130 PetriNetUnfolder]: 92684/121760 cut-off events. [2023-09-01 02:40:55,570 INFO L131 PetriNetUnfolder]: For 11939/11939 co-relation queries the response was YES. [2023-09-01 02:40:56,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266566 conditions, 121760 events. 92684/121760 cut-off events. For 11939/11939 co-relation queries the response was YES. Maximal size of possible extension queue 4840. Compared 806304 event pairs, 63360 based on Foata normal form. 0/64670 useless extension candidates. Maximal degree in co-relation 266539. Up to 118187 conditions per place. [2023-09-01 02:40:56,904 INFO L137 encePairwiseOnDemand]: 513/517 looper letters, 68 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-09-01 02:40:56,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 597 flow [2023-09-01 02:40:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:40:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:40:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 889 transitions. [2023-09-01 02:40:56,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42988394584139267 [2023-09-01 02:40:56,907 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 889 transitions. [2023-09-01 02:40:56,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 889 transitions. [2023-09-01 02:40:56,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:56,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 889 transitions. [2023-09-01 02:40:56,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:56,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:56,912 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:56,912 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 445 flow. Second operand 4 states and 889 transitions. [2023-09-01 02:40:56,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 597 flow [2023-09-01 02:40:56,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 591 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:56,922 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 455 flow [2023-09-01 02:40:56,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-09-01 02:40:56,923 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-09-01 02:40:56,923 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 455 flow [2023-09-01 02:40:56,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:56,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:56,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:56,941 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 [2023-09-01 02:40:57,130 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 [2023-09-01 02:40:57,131 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:40:57,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:57,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2122539071, now seen corresponding path program 1 times [2023-09-01 02:40:57,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:40:57,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195658377] [2023-09-01 02:40:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:57,132 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 [2023-09-01 02:40:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:40:57,133 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) [2023-09-01 02:40:57,135 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 [2023-09-01 02:40:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:40:57,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:40:57,426 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:40:57,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:40:57,566 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 02:40:57,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 02:40:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:40:57,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:40:57,682 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:40:57,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:40:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:41:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:00,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:41:00,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195658377] [2023-09-01 02:41:00,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195658377] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:41:00,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:41:00,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:41:00,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512116656] [2023-09-01 02:41:00,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:41:00,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:41:00,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:41:00,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:41:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:41:04,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:41:06,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:41:08,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:41:13,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 517 [2023-09-01 02:41:13,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 455 flow. Second operand has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:13,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:13,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 517 [2023-09-01 02:41:13,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:19,232 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:41:21,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:41:30,617 WARN L222 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:41:40,808 WARN L222 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:42:09,062 INFO L130 PetriNetUnfolder]: 185476/243866 cut-off events. [2023-09-01 02:42:09,062 INFO L131 PetriNetUnfolder]: For 31022/31022 co-relation queries the response was YES. [2023-09-01 02:42:10,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528669 conditions, 243866 events. 185476/243866 cut-off events. For 31022/31022 co-relation queries the response was YES. Maximal size of possible extension queue 9210. Compared 1718943 event pairs, 126320 based on Foata normal form. 0/148385 useless extension candidates. Maximal degree in co-relation 528641. Up to 98441 conditions per place. [2023-09-01 02:42:10,954 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 236 selfloop transitions, 29 changer transitions 0/271 dead transitions. [2023-09-01 02:42:10,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 271 transitions, 1609 flow [2023-09-01 02:42:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:42:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:42:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3102 transitions. [2023-09-01 02:42:10,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-09-01 02:42:10,962 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3102 transitions. [2023-09-01 02:42:10,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3102 transitions. [2023-09-01 02:42:10,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:10,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3102 transitions. [2023-09-01 02:42:10,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 206.8) internal successors, (3102), 15 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:11,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 517.0) internal successors, (8272), 16 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:11,003 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 517.0) internal successors, (8272), 16 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:11,004 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 455 flow. Second operand 15 states and 3102 transitions. [2023-09-01 02:42:11,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 271 transitions, 1609 flow [2023-09-01 02:42:11,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 271 transitions, 1596 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:42:11,031 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 673 flow [2023-09-01 02:42:11,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=673, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2023-09-01 02:42:11,032 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 31 predicate places. [2023-09-01 02:42:11,032 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 673 flow [2023-09-01 02:42:11,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:11,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:11,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:42:11,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:42:11,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:42:11,241 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 02:42:11,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash -717193971, now seen corresponding path program 1 times [2023-09-01 02:42:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:42:11,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549587144] [2023-09-01 02:42:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:11,241 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 [2023-09-01 02:42:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:42:11,243 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:42:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:42:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:42:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:42:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:11,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:11,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:11,501 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 02:42:11,501 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 3 case distinctions, treesize of input 18 treesize of output 47 [2023-09-01 02:42:11,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 02:42:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:42:11,590 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 [2023-09-01 02:42:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:42:11,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:42:11,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:42:11,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549587144] [2023-09-01 02:42:11,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549587144] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:11,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:42:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365474140] [2023-09-01 02:42:11,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:11,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:42:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:42:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:42:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:42:11,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-09-01 02:42:11,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 673 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:11,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:11,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-09-01 02:42:11,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand