./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:11:20,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:11:20,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:11:20,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:11:20,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:11:20,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:11:20,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:11:20,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:11:20,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:11:20,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:11:20,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:11:20,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:11:20,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:11:20,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:11:20,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:11:20,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:11:20,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:11:20,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:11:20,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:11:20,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:11:20,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:11:20,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:11:20,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:11:20,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:11:20,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:11:20,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:11:20,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:11:20,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:11:20,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:11:20,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:11:20,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:11:20,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:11:20,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:11:20,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:11:20,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:11:20,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:11:20,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:11:20,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:11:20,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:11:20,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:11:20,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:11:20,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:11:20,256 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:11:20,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:11:20,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:11:20,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:11:20,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:11:20,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:11:20,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:11:20,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:11:20,259 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:11:20,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:11:20,259 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:11:20,260 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:11:20,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:11:20,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:11:20,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:11:20,260 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:11:20,260 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:11:20,261 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:11:20,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:11:20,261 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:11:20,261 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:11:20,261 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:11:20,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:11:20,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:11:20,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:11:20,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:11:20,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:11:20,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:11:20,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:11:20,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:11:20,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:11:20,263 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:11:20,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:11:20,263 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:11:20,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:11:20,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:11:20,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:11:20,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:11:20,488 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:11:20,488 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:11:20,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 01:11:21,597 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:11:21,742 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:11:21,743 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 01:11:21,767 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed985ce52/257417722bb74c3d96994880706cab50/FLAGbb7b1d559 [2023-08-30 01:11:21,790 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed985ce52/257417722bb74c3d96994880706cab50 [2023-08-30 01:11:21,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:11:21,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:11:21,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:11:21,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:11:21,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:11:21,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:11:21" (1/1) ... [2023-08-30 01:11:21,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bad2bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:21, skipping insertion in model container [2023-08-30 01:11:21,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:11:21" (1/1) ... [2023-08-30 01:11:21,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:11:21,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:11:21,904 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-two-queue.wvr.c[2987,3000] [2023-08-30 01:11:21,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:11:21,922 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 01:11:21,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f0930c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:21, skipping insertion in model container [2023-08-30 01:11:21,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:11:21,924 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:11:21,925 INFO L158 Benchmark]: Toolchain (without parser) took 131.14ms. Allocated memory is still 75.5MB. Free memory was 47.7MB in the beginning and 55.8MB in the end (delta: -8.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2023-08-30 01:11:21,925 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 35.9MB in the beginning and 35.9MB in the end (delta: 31.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:11:21,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 129.64ms. Allocated memory is still 75.5MB. Free memory was 47.5MB in the beginning and 55.8MB in the end (delta: -8.3MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2023-08-30 01:11:21,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 35.9MB in the beginning and 35.9MB in the end (delta: 31.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 129.64ms. Allocated memory is still 75.5MB. Free memory was 47.5MB in the beginning and 55.8MB in the end (delta: -8.3MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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-two-queue.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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:11:23,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:11:23,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:11:23,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:11:23,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:11:23,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:11:23,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:11:23,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:11:23,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:11:23,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:11:23,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:11:23,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:11:23,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:11:23,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:11:23,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:11:23,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:11:23,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:11:23,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:11:23,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:11:23,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:11:23,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:11:23,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:11:23,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:11:23,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:11:23,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:11:23,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:11:23,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:11:23,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:11:23,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:11:23,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:11:23,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:11:23,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:11:23,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:11:23,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:11:23,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:11:23,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:11:23,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:11:23,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:11:23,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:11:23,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:11:23,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:11:23,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:11:23,748 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:11:23,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:11:23,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:11:23,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:11:23,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:11:23,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:11:23,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:11:23,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:11:23,751 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:11:23,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:11:23,751 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:11:23,752 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:11:23,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:11:23,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:11:23,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:11:23,752 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:11:23,752 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:11:23,753 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:11:23,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:11:23,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:11:23,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:11:23,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:11:23,753 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:11:23,753 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:11:23,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:11:23,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:11:23,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:11:23,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:11:23,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:11:23,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:11:23,754 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:11:23,755 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:11:23,755 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:11:23,755 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:11:23,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:11:23,755 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:11:23,755 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:11:23,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:11:23,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:11:23,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:11:23,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:11:23,997 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:11:23,997 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:11:23,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 01:11:25,042 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:11:25,230 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:11:25,231 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 01:11:25,241 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/437ed3627/76dd600b05254a7bae905fdbcf443f6c/FLAG2de018de1 [2023-08-30 01:11:25,252 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/437ed3627/76dd600b05254a7bae905fdbcf443f6c [2023-08-30 01:11:25,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:11:25,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:11:25,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:11:25,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:11:25,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:11:25,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c42fc8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25, skipping insertion in model container [2023-08-30 01:11:25,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:11:25,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:11:25,414 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-two-queue.wvr.c[2987,3000] [2023-08-30 01:11:25,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:11:25,437 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:11:25,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:11:25,463 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-two-queue.wvr.c[2987,3000] [2023-08-30 01:11:25,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:11:25,475 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:11:25,498 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-two-queue.wvr.c[2987,3000] [2023-08-30 01:11:25,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:11:25,511 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:11:25,512 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:11:25,517 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:11:25,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25 WrapperNode [2023-08-30 01:11:25,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:11:25,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:11:25,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:11:25,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:11:25,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,561 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2023-08-30 01:11:25,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:11:25,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:11:25,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:11:25,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:11:25,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,600 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:11:25,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:11:25,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:11:25,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:11:25,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (1/1) ... [2023-08-30 01:11:25,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:11:25,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:11:25,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 01:11:25,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 01:11:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:11:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:11:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:11:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:11:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:11:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:11:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:11:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:11:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 01:11:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 01:11:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:11:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:11:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:11:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:11:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:11:25,663 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 01:11:25,794 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:11:25,799 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:11:26,192 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:11:26,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:11:26,321 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 01:11:26,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:11:26 BoogieIcfgContainer [2023-08-30 01:11:26,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:11:26,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:11:26,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:11:26,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:11:26,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:11:25" (1/3) ... [2023-08-30 01:11:26,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650de3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:11:26, skipping insertion in model container [2023-08-30 01:11:26,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:11:25" (2/3) ... [2023-08-30 01:11:26,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650de3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:11:26, skipping insertion in model container [2023-08-30 01:11:26,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:11:26" (3/3) ... [2023-08-30 01:11:26,329 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-08-30 01:11:26,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:11:26,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-30 01:11:26,340 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:11:26,398 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:11:26,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 187 transitions, 390 flow [2023-08-30 01:11:26,498 INFO L130 PetriNetUnfolder]: 13/185 cut-off events. [2023-08-30 01:11:26,499 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:11:26,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 185 events. 13/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-08-30 01:11:26,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 187 transitions, 390 flow [2023-08-30 01:11:26,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 181 transitions, 374 flow [2023-08-30 01:11:26,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:11:26,527 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 181 transitions, 374 flow [2023-08-30 01:11:26,530 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 181 transitions, 374 flow [2023-08-30 01:11:26,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 181 transitions, 374 flow [2023-08-30 01:11:26,559 INFO L130 PetriNetUnfolder]: 13/181 cut-off events. [2023-08-30 01:11:26,563 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:11:26,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 13/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 173 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-08-30 01:11:26,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 1036 [2023-08-30 01:11:38,754 INFO L134 LiptonReduction]: Checked pairs total: 2620 [2023-08-30 01:11:38,754 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 01:11:38,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:11:38,768 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;@27b98aad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:11:38,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-30 01:11:38,770 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:11:38,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:11:38,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:38,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:11:38,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:38,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash 26264, now seen corresponding path program 1 times [2023-08-30 01:11:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:38,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797054638] [2023-08-30 01:11:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:38,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:38,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:38,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 01:11:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:11:38,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:39,015 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:11:39,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:11:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:39,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:39,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797054638] [2023-08-30 01:11:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797054638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:39,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:39,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:11:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142631832] [2023-08-30 01:11:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:39,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:11:39,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:11:39,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:11:39,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-08-30 01:11:39,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:39,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:39,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-08-30 01:11:39,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:39,606 INFO L130 PetriNetUnfolder]: 803/1327 cut-off events. [2023-08-30 01:11:39,607 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-08-30 01:11:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 1327 events. 803/1327 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6634 event pairs, 672 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 1204. Up to 666 conditions per place. [2023-08-30 01:11:39,617 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 71 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-30 01:11:39,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 75 transitions, 324 flow [2023-08-30 01:11:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-08-30 01:11:39,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2023-08-30 01:11:39,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-08-30 01:11:39,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-08-30 01:11:39,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:39,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-08-30 01:11:39,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:39,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:39,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:39,650 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 92 flow. Second operand 3 states and 532 transitions. [2023-08-30 01:11:39,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 75 transitions, 324 flow [2023-08-30 01:11:39,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 75 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:11:39,655 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 114 flow [2023-08-30 01:11:39,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-30 01:11:39,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-30 01:11:39,660 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 114 flow [2023-08-30 01:11:39,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:39,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:39,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:11:39,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:39,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:39,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:39,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash 26263, now seen corresponding path program 1 times [2023-08-30 01:11:39,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:39,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451660400] [2023-08-30 01:11:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:39,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:39,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:39,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 01:11:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:39,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:11:39,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:39,964 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:11:39,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:11:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:39,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:39,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:39,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451660400] [2023-08-30 01:11:39,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451660400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:39,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:39,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:11:39,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262523715] [2023-08-30 01:11:39,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:39,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:11:39,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:39,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:11:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:11:40,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-08-30 01:11:40,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:40,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-08-30 01:11:40,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:40,230 INFO L130 PetriNetUnfolder]: 803/1323 cut-off events. [2023-08-30 01:11:40,230 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 01:11:40,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 1323 events. 803/1323 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 6725 event pairs, 672 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 1328. Up to 1323 conditions per place. [2023-08-30 01:11:40,236 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 01:11:40,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 190 flow [2023-08-30 01:11:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-30 01:11:40,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420485175202156 [2023-08-30 01:11:40,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-30 01:11:40,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-30 01:11:40,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:40,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-30 01:11:40,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,242 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 114 flow. Second operand 3 states and 492 transitions. [2023-08-30 01:11:40,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 190 flow [2023-08-30 01:11:40,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:11:40,244 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 104 flow [2023-08-30 01:11:40,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-08-30 01:11:40,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-08-30 01:11:40,245 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 104 flow [2023-08-30 01:11:40,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:40,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:11:40,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:40,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:40,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:40,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash 817120, now seen corresponding path program 1 times [2023-08-30 01:11:40,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:40,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098471684] [2023-08-30 01:11:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:40,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:40,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:40,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 01:11:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:11:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:40,566 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 01:11:40,567 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 01:11:40,628 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 01:11:40,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 01:11:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:40,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:40,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:40,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098471684] [2023-08-30 01:11:40,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098471684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:40,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:40,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:11:40,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651594688] [2023-08-30 01:11:40,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:40,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:11:40,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:40,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:11:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:11:40,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 371 [2023-08-30 01:11:40,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:40,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 371 [2023-08-30 01:11:40,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:40,916 INFO L130 PetriNetUnfolder]: 607/1027 cut-off events. [2023-08-30 01:11:40,916 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 01:11:40,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 1027 events. 607/1027 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 5075 event pairs, 504 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 2076. Up to 1027 conditions per place. [2023-08-30 01:11:40,921 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 01:11:40,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 176 flow [2023-08-30 01:11:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 01:11:40,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44833782569631625 [2023-08-30 01:11:40,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 01:11:40,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 01:11:40,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:40,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 01:11:40,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,929 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 104 flow. Second operand 3 states and 499 transitions. [2023-08-30 01:11:40,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 176 flow [2023-08-30 01:11:40,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:40,937 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2023-08-30 01:11:40,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-30 01:11:40,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-08-30 01:11:40,938 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2023-08-30 01:11:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:40,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:40,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:11:40,951 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 (4)] Ended with exit code 0 [2023-08-30 01:11:41,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:41,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:41,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash 817119, now seen corresponding path program 1 times [2023-08-30 01:11:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:41,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091481414] [2023-08-30 01:11:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:41,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:41,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:41,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 01:11:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 01:11:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:41,244 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 01:11:41,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 01:11:41,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 01:11:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:41,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:11:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:41,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:41,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:41,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091481414] [2023-08-30 01:11:41,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091481414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:41,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:41,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:11:41,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951383967] [2023-08-30 01:11:41,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:41,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:11:41,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:11:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:11:41,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 371 [2023-08-30 01:11:41,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:41,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:41,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 371 [2023-08-30 01:11:41,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:41,637 INFO L130 PetriNetUnfolder]: 411/731 cut-off events. [2023-08-30 01:11:41,637 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 01:11:41,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 731 events. 411/731 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3442 event pairs, 336 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 1484. Up to 731 conditions per place. [2023-08-30 01:11:41,640 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 01:11:41,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 169 flow [2023-08-30 01:11:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-08-30 01:11:41,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2023-08-30 01:11:41,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-08-30 01:11:41,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-08-30 01:11:41,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:41,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-08-30 01:11:41,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:41,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:41,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:41,646 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 3 states and 497 transitions. [2023-08-30 01:11:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 169 flow [2023-08-30 01:11:41,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:41,647 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 98 flow [2023-08-30 01:11:41,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-30 01:11:41,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-08-30 01:11:41,648 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 98 flow [2023-08-30 01:11:41,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:41,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:41,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:11:41,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:41,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:41,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:41,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash 816702, now seen corresponding path program 1 times [2023-08-30 01:11:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:41,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417340628] [2023-08-30 01:11:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:41,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:41,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 01:11:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:11:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:41,981 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:11:41,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:11:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:42,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:11:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:42,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:42,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417340628] [2023-08-30 01:11:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417340628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:11:42,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:11:42,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:11:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459885360] [2023-08-30 01:11:42,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:11:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:11:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:11:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:11:42,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 371 [2023-08-30 01:11:42,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:42,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:42,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 371 [2023-08-30 01:11:42,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:43,921 INFO L130 PetriNetUnfolder]: 620/1103 cut-off events. [2023-08-30 01:11:43,921 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 01:11:43,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 1103 events. 620/1103 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5647 event pairs, 504 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 2245. Up to 367 conditions per place. [2023-08-30 01:11:43,925 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 86 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2023-08-30 01:11:43,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 101 transitions, 456 flow [2023-08-30 01:11:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:11:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:11:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-08-30 01:11:43,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281221922731357 [2023-08-30 01:11:43,928 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-08-30 01:11:43,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-08-30 01:11:43,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:43,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-08-30 01:11:43,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:43,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:43,934 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:43,934 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 98 flow. Second operand 6 states and 953 transitions. [2023-08-30 01:11:43,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 101 transitions, 456 flow [2023-08-30 01:11:43,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 101 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:43,938 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 210 flow [2023-08-30 01:11:43,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-30 01:11:43,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-30 01:11:43,940 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 210 flow [2023-08-30 01:11:43,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:43,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:43,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:11:43,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 01:11:44,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:44,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:44,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:44,151 INFO L85 PathProgramCache]: Analyzing trace with hash 785272852, now seen corresponding path program 1 times [2023-08-30 01:11:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:44,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260930505] [2023-08-30 01:11:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:44,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:44,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:44,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 01:11:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:11:44,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:44,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:44,246 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 01:11:44,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 01:11:44,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 01:11:44,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:11:44,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:11:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:44,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:44,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260930505] [2023-08-30 01:11:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260930505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:44,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:44,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:11:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310816324] [2023-08-30 01:11:44,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:11:44,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:11:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:11:44,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 371 [2023-08-30 01:11:44,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:44,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:44,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 371 [2023-08-30 01:11:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:44,622 INFO L130 PetriNetUnfolder]: 578/1019 cut-off events. [2023-08-30 01:11:44,622 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 01:11:44,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 1019 events. 578/1019 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5222 event pairs, 468 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 2117. Up to 1019 conditions per place. [2023-08-30 01:11:44,626 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 01:11:44,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 296 flow [2023-08-30 01:11:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-30 01:11:44,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393530997304582 [2023-08-30 01:11:44,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-30 01:11:44,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-30 01:11:44,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:44,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-30 01:11:44,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:44,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:44,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:44,631 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 210 flow. Second operand 3 states and 489 transitions. [2023-08-30 01:11:44,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 296 flow [2023-08-30 01:11:44,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:44,632 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 189 flow [2023-08-30 01:11:44,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 01:11:44,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-30 01:11:44,633 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 189 flow [2023-08-30 01:11:44,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:44,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:44,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:11:44,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:44,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:44,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:44,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash 785272851, now seen corresponding path program 1 times [2023-08-30 01:11:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163155345] [2023-08-30 01:11:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:44,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:44,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:44,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:44,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 01:11:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:11:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:44,944 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:11:44,944 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 01:11:44,968 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 01:11:44,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 01:11:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:44,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:44,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:44,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163155345] [2023-08-30 01:11:44,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163155345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:44,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:44,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:11:44,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816500551] [2023-08-30 01:11:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:44,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:11:44,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:44,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:11:44,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:11:45,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 371 [2023-08-30 01:11:45,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:45,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 371 [2023-08-30 01:11:45,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:45,172 INFO L130 PetriNetUnfolder]: 536/935 cut-off events. [2023-08-30 01:11:45,172 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 01:11:45,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 935 events. 536/935 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4650 event pairs, 432 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 1939. Up to 935 conditions per place. [2023-08-30 01:11:45,176 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 01:11:45,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 271 flow [2023-08-30 01:11:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:11:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:11:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-30 01:11:45,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43755615453728663 [2023-08-30 01:11:45,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-30 01:11:45,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-30 01:11:45,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:45,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-30 01:11:45,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,182 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 189 flow. Second operand 3 states and 487 transitions. [2023-08-30 01:11:45,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 271 flow [2023-08-30 01:11:45,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:45,185 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 186 flow [2023-08-30 01:11:45,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-30 01:11:45,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-30 01:11:45,186 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 186 flow [2023-08-30 01:11:45,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:45,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:11:45,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:45,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:45,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:45,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:45,395 INFO L85 PathProgramCache]: Analyzing trace with hash 785272764, now seen corresponding path program 1 times [2023-08-30 01:11:45,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:45,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473247400] [2023-08-30 01:11:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:45,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:45,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:45,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:45,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 01:11:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:11:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:45,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 01:11:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:45,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:45,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473247400] [2023-08-30 01:11:45,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473247400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:45,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:45,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:11:45,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875441902] [2023-08-30 01:11:45,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:45,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:11:45,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:45,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:11:45,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:11:45,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 371 [2023-08-30 01:11:45,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:45,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 371 [2023-08-30 01:11:45,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:45,696 INFO L130 PetriNetUnfolder]: 407/716 cut-off events. [2023-08-30 01:11:45,696 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 01:11:45,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 716 events. 407/716 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3332 event pairs, 315 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 1498. Up to 698 conditions per place. [2023-08-30 01:11:45,699 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 37 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-08-30 01:11:45,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 264 flow [2023-08-30 01:11:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:11:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:11:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-30 01:11:45,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211590296495957 [2023-08-30 01:11:45,701 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-30 01:11:45,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-30 01:11:45,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:45,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-30 01:11:45,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,704 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,704 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 186 flow. Second operand 4 states and 625 transitions. [2023-08-30 01:11:45,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 264 flow [2023-08-30 01:11:45,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:45,706 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 189 flow [2023-08-30 01:11:45,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-30 01:11:45,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-30 01:11:45,707 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 189 flow [2023-08-30 01:11:45,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:45,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:45,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:11:45,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:45,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:45,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:45,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:45,918 INFO L85 PathProgramCache]: Analyzing trace with hash 785272765, now seen corresponding path program 1 times [2023-08-30 01:11:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:45,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104559318] [2023-08-30 01:11:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:45,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:45,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:45,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:45,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 01:11:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 01:11:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:46,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:11:46,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:46,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104559318] [2023-08-30 01:11:46,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104559318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:11:46,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:11:46,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:11:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213062222] [2023-08-30 01:11:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:11:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:11:46,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:11:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:11:46,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-08-30 01:11:46,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:46,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:46,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-08-30 01:11:46,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:46,267 INFO L130 PetriNetUnfolder]: 301/548 cut-off events. [2023-08-30 01:11:46,267 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 01:11:46,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 548 events. 301/548 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2448 event pairs, 237 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 1163. Up to 480 conditions per place. [2023-08-30 01:11:46,269 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 47 selfloop transitions, 7 changer transitions 1/55 dead transitions. [2023-08-30 01:11:46,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 337 flow [2023-08-30 01:11:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:11:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:11:46,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 650 transitions. [2023-08-30 01:11:46,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380053908355795 [2023-08-30 01:11:46,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 650 transitions. [2023-08-30 01:11:46,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 650 transitions. [2023-08-30 01:11:46,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:46,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 650 transitions. [2023-08-30 01:11:46,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.5) internal successors, (650), 4 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:46,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:46,274 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:46,274 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 189 flow. Second operand 4 states and 650 transitions. [2023-08-30 01:11:46,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 337 flow [2023-08-30 01:11:46,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:11:46,276 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 223 flow [2023-08-30 01:11:46,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 01:11:46,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-30 01:11:46,277 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 223 flow [2023-08-30 01:11:46,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:46,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:46,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:11:46,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:11:46,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:46,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:46,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1426314658, now seen corresponding path program 1 times [2023-08-30 01:11:46,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:46,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928795788] [2023-08-30 01:11:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:46,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:46,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 01:11:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:11:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:46,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 01:11:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:46,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:11:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:47,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928795788] [2023-08-30 01:11:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928795788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:11:47,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:11:47,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 01:11:47,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609581116] [2023-08-30 01:11:47,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:11:47,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:11:47,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:11:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:11:48,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 371 [2023-08-30 01:11:48,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 223 flow. Second operand has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:48,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:48,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 371 [2023-08-30 01:11:48,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:51,317 INFO L130 PetriNetUnfolder]: 359/653 cut-off events. [2023-08-30 01:11:51,317 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-30 01:11:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 653 events. 359/653 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2847 event pairs, 276 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 1493. Up to 241 conditions per place. [2023-08-30 01:11:51,320 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 76 selfloop transitions, 15 changer transitions 1/92 dead transitions. [2023-08-30 01:11:51,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 92 transitions, 534 flow [2023-08-30 01:11:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:11:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:11:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1321 transitions. [2023-08-30 01:11:51,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39562743336328243 [2023-08-30 01:11:51,324 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1321 transitions. [2023-08-30 01:11:51,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1321 transitions. [2023-08-30 01:11:51,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:51,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1321 transitions. [2023-08-30 01:11:51,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.77777777777777) internal successors, (1321), 9 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:51,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 371.0) internal successors, (3710), 10 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:51,330 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 371.0) internal successors, (3710), 10 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:51,331 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 223 flow. Second operand 9 states and 1321 transitions. [2023-08-30 01:11:51,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 92 transitions, 534 flow [2023-08-30 01:11:51,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 522 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 01:11:51,333 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 261 flow [2023-08-30 01:11:51,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-30 01:11:51,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-08-30 01:11:51,334 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 261 flow [2023-08-30 01:11:51,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:51,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:51,335 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:11:51,359 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 (11)] Ended with exit code 0 [2023-08-30 01:11:51,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:51,542 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:11:51,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1436934120, now seen corresponding path program 2 times [2023-08-30 01:11:51,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:51,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021689809] [2023-08-30 01:11:51,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:11:51,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:51,545 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:11:51,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 01:11:51,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:11:51,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:11:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:11:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:51,671 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:11:51,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:11:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:51,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:11:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:11:52,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:11:52,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021689809] [2023-08-30 01:11:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021689809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:11:52,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:11:52,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:11:52,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040012709] [2023-08-30 01:11:52,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:11:52,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:11:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:11:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:11:52,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:11:54,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 371 [2023-08-30 01:11:54,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 261 flow. Second operand has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:54,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:11:54,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 371 [2023-08-30 01:11:54,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:11:58,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:11:59,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:12:02,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:12:04,550 INFO L130 PetriNetUnfolder]: 993/1767 cut-off events. [2023-08-30 01:12:04,550 INFO L131 PetriNetUnfolder]: For 835/835 co-relation queries the response was YES. [2023-08-30 01:12:04,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4376 conditions, 1767 events. 993/1767 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9457 event pairs, 768 based on Foata normal form. 11/1230 useless extension candidates. Maximal degree in co-relation 4355. Up to 353 conditions per place. [2023-08-30 01:12:04,558 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 180 selfloop transitions, 31 changer transitions 1/212 dead transitions. [2023-08-30 01:12:04,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 212 transitions, 1248 flow [2023-08-30 01:12:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:12:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:12:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1939 transitions. [2023-08-30 01:12:04,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43553459119496857 [2023-08-30 01:12:04,565 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1939 transitions. [2023-08-30 01:12:04,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1939 transitions. [2023-08-30 01:12:04,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:04,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1939 transitions. [2023-08-30 01:12:04,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.58333333333334) internal successors, (1939), 12 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:04,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:04,575 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:04,575 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 261 flow. Second operand 12 states and 1939 transitions. [2023-08-30 01:12:04,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 212 transitions, 1248 flow [2023-08-30 01:12:04,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 212 transitions, 1190 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 01:12:04,580 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 464 flow [2023-08-30 01:12:04,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=464, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-30 01:12:04,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2023-08-30 01:12:04,580 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 464 flow [2023-08-30 01:12:04,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:04,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:04,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:12:04,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:04,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:04,790 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:12:04,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:04,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1266080824, now seen corresponding path program 1 times [2023-08-30 01:12:04,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:04,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629070322] [2023-08-30 01:12:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:12:04,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:04,793 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:04,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 01:12:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:12:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:12:04,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:12:04,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:12:04,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629070322] [2023-08-30 01:12:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629070322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:12:04,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:12:04,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:12:04,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027305400] [2023-08-30 01:12:04,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:12:04,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:12:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:04,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:12:04,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:12:04,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 371 [2023-08-30 01:12:04,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:04,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:12:04,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 371 [2023-08-30 01:12:04,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:05,178 INFO L130 PetriNetUnfolder]: 1293/2347 cut-off events. [2023-08-30 01:12:05,178 INFO L131 PetriNetUnfolder]: For 1145/1145 co-relation queries the response was YES. [2023-08-30 01:12:05,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5744 conditions, 2347 events. 1293/2347 cut-off events. For 1145/1145 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13740 event pairs, 493 based on Foata normal form. 80/1689 useless extension candidates. Maximal degree in co-relation 5716. Up to 1558 conditions per place. [2023-08-30 01:12:05,187 INFO L137 encePairwiseOnDemand]: 366/371 looper letters, 71 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-30 01:12:05,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 644 flow [2023-08-30 01:12:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:12:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:12:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 01:12:05,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2023-08-30 01:12:05,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 01:12:05,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 01:12:05,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:05,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 01:12:05,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:05,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:05,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:05,192 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 464 flow. Second operand 3 states and 513 transitions. [2023-08-30 01:12:05,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 644 flow [2023-08-30 01:12:05,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 583 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 01:12:05,196 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 419 flow [2023-08-30 01:12:05,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-30 01:12:05,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2023-08-30 01:12:05,196 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 419 flow [2023-08-30 01:12:05,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:05,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:05,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:12:05,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:05,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:05,402 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:12:05,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1267015809, now seen corresponding path program 1 times [2023-08-30 01:12:05,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:05,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455130898] [2023-08-30 01:12:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:12:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:05,404 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:05,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 01:12:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:12:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 01:12:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:12:05,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:12:05,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:05,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455130898] [2023-08-30 01:12:05,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455130898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:12:05,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:12:05,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:12:05,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117998244] [2023-08-30 01:12:05,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:12:05,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:12:05,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:12:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:12:05,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-08-30 01:12:05,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:05,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:12:05,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-08-30 01:12:05,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:06,068 INFO L130 PetriNetUnfolder]: 1453/2767 cut-off events. [2023-08-30 01:12:06,068 INFO L131 PetriNetUnfolder]: For 1664/1664 co-relation queries the response was YES. [2023-08-30 01:12:06,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7322 conditions, 2767 events. 1453/2767 cut-off events. For 1664/1664 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17302 event pairs, 1243 based on Foata normal form. 80/2295 useless extension candidates. Maximal degree in co-relation 7292. Up to 2346 conditions per place. [2023-08-30 01:12:06,087 INFO L137 encePairwiseOnDemand]: 365/371 looper letters, 87 selfloop transitions, 3 changer transitions 1/91 dead transitions. [2023-08-30 01:12:06,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 776 flow [2023-08-30 01:12:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:12:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:12:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 651 transitions. [2023-08-30 01:12:06,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386792452830189 [2023-08-30 01:12:06,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 651 transitions. [2023-08-30 01:12:06,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 651 transitions. [2023-08-30 01:12:06,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:06,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 651 transitions. [2023-08-30 01:12:06,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:06,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:06,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:06,094 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 419 flow. Second operand 4 states and 651 transitions. [2023-08-30 01:12:06,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 776 flow [2023-08-30 01:12:06,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 774 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:12:06,101 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 430 flow [2023-08-30 01:12:06,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2023-08-30 01:12:06,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2023-08-30 01:12:06,102 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 430 flow [2023-08-30 01:12:06,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:06,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:06,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:12:06,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:06,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:06,310 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:12:06,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1880840294, now seen corresponding path program 1 times [2023-08-30 01:12:06,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:06,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752616662] [2023-08-30 01:12:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:12:06,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:06,326 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:06,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 01:12:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:12:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 01:12:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:06,464 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:12:06,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:12:06,502 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:12:06,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:12:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:12:06,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 01:12:06,594 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 01:12:06,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 01:12:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:12:06,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:12:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:12:07,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:07,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752616662] [2023-08-30 01:12:07,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752616662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:12:07,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:12:07,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:12:07,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684708283] [2023-08-30 01:12:07,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:12:07,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:12:07,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:12:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:12:14,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 371 [2023-08-30 01:12:14,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:14,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:12:14,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 371 [2023-08-30 01:12:14,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:20,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:12:26,763 WARN L222 SmtUtils]: Spent 6.08s 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) [2023-08-30 01:12:38,685 WARN L222 SmtUtils]: Spent 9.53s 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) [2023-08-30 01:12:43,499 INFO L130 PetriNetUnfolder]: 3305/6183 cut-off events. [2023-08-30 01:12:43,500 INFO L131 PetriNetUnfolder]: For 4388/4388 co-relation queries the response was YES. [2023-08-30 01:12:43,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17222 conditions, 6183 events. 3305/6183 cut-off events. For 4388/4388 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 43749 event pairs, 2765 based on Foata normal form. 0/5669 useless extension candidates. Maximal degree in co-relation 17190. Up to 2312 conditions per place. [2023-08-30 01:12:43,539 INFO L137 encePairwiseOnDemand]: 362/371 looper letters, 130 selfloop transitions, 33 changer transitions 0/163 dead transitions. [2023-08-30 01:12:43,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 163 transitions, 1265 flow [2023-08-30 01:12:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 01:12:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 01:12:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2110 transitions. [2023-08-30 01:12:43,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915543575920935 [2023-08-30 01:12:43,545 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2110 transitions. [2023-08-30 01:12:43,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2110 transitions. [2023-08-30 01:12:43,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:43,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2110 transitions. [2023-08-30 01:12:43,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 140.66666666666666) internal successors, (2110), 15 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:43,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 371.0) internal successors, (5936), 16 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:43,567 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 371.0) internal successors, (5936), 16 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:43,567 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 430 flow. Second operand 15 states and 2110 transitions. [2023-08-30 01:12:43,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 163 transitions, 1265 flow [2023-08-30 01:12:43,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 163 transitions, 1243 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 01:12:43,590 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 686 flow [2023-08-30 01:12:43,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=686, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2023-08-30 01:12:43,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2023-08-30 01:12:43,591 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 686 flow [2023-08-30 01:12:43,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:43,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:43,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:12:43,614 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 (15)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:43,800 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:12:43,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1880840295, now seen corresponding path program 1 times [2023-08-30 01:12:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:43,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246181001] [2023-08-30 01:12:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:12:43,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:43,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:43,802 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:43,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 01:12:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:12:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:12:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:43,917 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:12:43,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:12:43,936 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 01:12:43,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 01:12:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:12:43,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:12:43,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:43,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246181001] [2023-08-30 01:12:43,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246181001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:12:43,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:12:43,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:12:43,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894927887] [2023-08-30 01:12:43,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:12:43,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:12:43,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:12:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:12:44,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 371 [2023-08-30 01:12:44,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 686 flow. Second operand has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:44,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:12:44,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 371 [2023-08-30 01:12:44,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:44,669 INFO L130 PetriNetUnfolder]: 2336/4498 cut-off events. [2023-08-30 01:12:44,669 INFO L131 PetriNetUnfolder]: For 5456/5456 co-relation queries the response was YES. [2023-08-30 01:12:44,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13374 conditions, 4498 events. 2336/4498 cut-off events. For 5456/5456 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 31126 event pairs, 1892 based on Foata normal form. 478/4976 useless extension candidates. Maximal degree in co-relation 13335. Up to 4485 conditions per place. [2023-08-30 01:12:44,685 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 65 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-08-30 01:12:44,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 77 transitions, 832 flow [2023-08-30 01:12:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:12:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:12:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2023-08-30 01:12:44,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419811320754717 [2023-08-30 01:12:44,689 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2023-08-30 01:12:44,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2023-08-30 01:12:44,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:44,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2023-08-30 01:12:44,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:44,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:44,692 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:44,692 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 686 flow. Second operand 4 states and 623 transitions. [2023-08-30 01:12:44,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 77 transitions, 832 flow [2023-08-30 01:12:44,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 77 transitions, 809 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 01:12:44,704 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 679 flow [2023-08-30 01:12:44,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=679, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2023-08-30 01:12:44,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2023-08-30 01:12:44,704 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 679 flow [2023-08-30 01:12:44,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:44,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:44,705 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 01:12:44,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:44,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:44,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:12:44,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1195347971, now seen corresponding path program 2 times [2023-08-30 01:12:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:44,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752331150] [2023-08-30 01:12:44,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:12:44,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:44,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:44,914 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:44,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 01:12:44,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:12:44,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:12:44,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 01:12:44,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:45,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 01:12:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 01:12:45,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:12:45,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:45,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752331150] [2023-08-30 01:12:45,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752331150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:12:45,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:12:45,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:12:45,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74527130] [2023-08-30 01:12:45,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:12:45,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:12:45,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:45,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:12:45,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:12:45,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 371 [2023-08-30 01:12:45,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 679 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:45,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:12:45,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 371 [2023-08-30 01:12:45,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:45,723 INFO L130 PetriNetUnfolder]: 1585/3155 cut-off events. [2023-08-30 01:12:45,723 INFO L131 PetriNetUnfolder]: For 4543/4543 co-relation queries the response was YES. [2023-08-30 01:12:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8821 conditions, 3155 events. 1585/3155 cut-off events. For 4543/4543 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20504 event pairs, 1243 based on Foata normal form. 360/3515 useless extension candidates. Maximal degree in co-relation 8781. Up to 3087 conditions per place. [2023-08-30 01:12:45,735 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 46 selfloop transitions, 29 changer transitions 0/75 dead transitions. [2023-08-30 01:12:45,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 813 flow [2023-08-30 01:12:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:12:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:12:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-08-30 01:12:45,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41846361185983827 [2023-08-30 01:12:45,738 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-08-30 01:12:45,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-08-30 01:12:45,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:45,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-08-30 01:12:45,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:45,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:45,741 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:45,741 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 679 flow. Second operand 4 states and 621 transitions. [2023-08-30 01:12:45,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 813 flow [2023-08-30 01:12:45,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 75 transitions, 791 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:12:45,747 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 699 flow [2023-08-30 01:12:45,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=699, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2023-08-30 01:12:45,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2023-08-30 01:12:45,748 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 699 flow [2023-08-30 01:12:45,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:45,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:45,748 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:12:45,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:45,955 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:12:45,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash 616109568, now seen corresponding path program 2 times [2023-08-30 01:12:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445907762] [2023-08-30 01:12:45,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:12:45,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:45,977 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:45,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 01:12:46,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:12:46,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:12:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 01:12:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:46,141 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:12:46,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:12:46,203 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:12:46,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:12:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:12:46,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 01:12:46,308 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 01:12:46,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 01:12:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 01:12:46,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:12:46,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445907762] [2023-08-30 01:12:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445907762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:12:46,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:12:46,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:12:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587625161] [2023-08-30 01:12:46,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:12:46,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:12:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:12:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:12:46,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 371 [2023-08-30 01:12:46,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 699 flow. Second operand has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:46,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:12:46,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 371 [2023-08-30 01:12:46,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:12:46,877 INFO L130 PetriNetUnfolder]: 1355/2751 cut-off events. [2023-08-30 01:12:46,877 INFO L131 PetriNetUnfolder]: For 2793/2793 co-relation queries the response was YES. [2023-08-30 01:12:46,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7239 conditions, 2751 events. 1355/2751 cut-off events. For 2793/2793 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17817 event pairs, 1041 based on Foata normal form. 160/2911 useless extension candidates. Maximal degree in co-relation 7202. Up to 2738 conditions per place. [2023-08-30 01:12:46,887 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 61 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-08-30 01:12:46,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 825 flow [2023-08-30 01:12:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:12:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:12:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2023-08-30 01:12:46,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063342318059299 [2023-08-30 01:12:46,890 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2023-08-30 01:12:46,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2023-08-30 01:12:46,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:12:46,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2023-08-30 01:12:46,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:46,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:46,893 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:46,893 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 699 flow. Second operand 4 states and 603 transitions. [2023-08-30 01:12:46,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 825 flow [2023-08-30 01:12:46,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 778 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:12:46,898 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 656 flow [2023-08-30 01:12:46,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=656, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-30 01:12:46,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2023-08-30 01:12:46,898 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 656 flow [2023-08-30 01:12:46,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:12:46,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:12:46,898 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:12:46,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 01:12:47,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:47,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:12:47,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:12:47,110 INFO L85 PathProgramCache]: Analyzing trace with hash 333205080, now seen corresponding path program 3 times [2023-08-30 01:12:47,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:12:47,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757588652] [2023-08-30 01:12:47,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:12:47,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:12:47,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:12:47,117 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:12:47,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 01:12:47,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:12:47,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:12:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:12:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:12:47,334 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:12:47,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:12:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:12:47,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:12:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:12:49,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:12:49,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757588652] [2023-08-30 01:12:49,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757588652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:12:49,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:12:49,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:12:49,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216902248] [2023-08-30 01:12:49,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:12:49,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:12:49,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:12:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:12:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:13:01,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 371 [2023-08-30 01:13:01,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 656 flow. Second operand has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:01,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:13:01,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 371 [2023-08-30 01:13:01,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:13:08,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:10,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:12,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:14,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:16,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:18,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:20,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:22,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:24,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:26,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:29,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:32,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:35,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:38,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:41,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:43,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:13:49,118 INFO L130 PetriNetUnfolder]: 3559/7171 cut-off events. [2023-08-30 01:13:49,120 INFO L131 PetriNetUnfolder]: For 5782/5782 co-relation queries the response was YES. [2023-08-30 01:13:49,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18831 conditions, 7171 events. 3559/7171 cut-off events. For 5782/5782 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 51767 event pairs, 2733 based on Foata normal form. 32/7203 useless extension candidates. Maximal degree in co-relation 18795. Up to 1273 conditions per place. [2023-08-30 01:13:49,138 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 362 selfloop transitions, 89 changer transitions 1/452 dead transitions. [2023-08-30 01:13:49,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 452 transitions, 3687 flow [2023-08-30 01:13:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 01:13:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 01:13:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5539 transitions. [2023-08-30 01:13:49,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41471997604073074 [2023-08-30 01:13:49,173 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5539 transitions. [2023-08-30 01:13:49,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5539 transitions. [2023-08-30 01:13:49,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:13:49,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5539 transitions. [2023-08-30 01:13:49,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 153.86111111111111) internal successors, (5539), 36 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 371.0) internal successors, (13727), 37 states have internal predecessors, (13727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,208 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 371.0) internal successors, (13727), 37 states have internal predecessors, (13727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,208 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 656 flow. Second operand 36 states and 5539 transitions. [2023-08-30 01:13:49,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 452 transitions, 3687 flow [2023-08-30 01:13:49,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 452 transitions, 3662 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:13:49,243 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1651 flow [2023-08-30 01:13:49,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1651, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2023-08-30 01:13:49,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2023-08-30 01:13:49,244 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1651 flow [2023-08-30 01:13:49,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:13:49,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:13:49,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 01:13:49,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:49,452 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:13:49,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:13:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash -736099882, now seen corresponding path program 1 times [2023-08-30 01:13:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:13:49,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942662579] [2023-08-30 01:13:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:13:49,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:49,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:13:49,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:13:49,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 01:13:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:13:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:13:49,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:13:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:13:49,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:13:49,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:13:49,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942662579] [2023-08-30 01:13:49,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942662579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:13:49,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:13:49,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:13:49,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507624664] [2023-08-30 01:13:49,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:13:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:13:49,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:13:49,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:13:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:13:49,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 371 [2023-08-30 01:13:49,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1651 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:49,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:13:49,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 371 [2023-08-30 01:13:49,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:13:50,529 INFO L130 PetriNetUnfolder]: 4186/8174 cut-off events. [2023-08-30 01:13:50,529 INFO L131 PetriNetUnfolder]: For 6116/6116 co-relation queries the response was YES. [2023-08-30 01:13:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21910 conditions, 8174 events. 4186/8174 cut-off events. For 6116/6116 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 58494 event pairs, 1707 based on Foata normal form. 80/8254 useless extension candidates. Maximal degree in co-relation 21860. Up to 4241 conditions per place. [2023-08-30 01:13:50,557 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 142 selfloop transitions, 3 changer transitions 5/150 dead transitions. [2023-08-30 01:13:50,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 150 transitions, 1977 flow [2023-08-30 01:13:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:13:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:13:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-30 01:13:50,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573225516621743 [2023-08-30 01:13:50,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-30 01:13:50,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-30 01:13:50,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:13:50,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-30 01:13:50,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:50,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:50,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:50,572 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1651 flow. Second operand 3 states and 509 transitions. [2023-08-30 01:13:50,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 150 transitions, 1977 flow [2023-08-30 01:13:50,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 150 transitions, 1839 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-08-30 01:13:50,621 INFO L231 Difference]: Finished difference. Result has 128 places, 140 transitions, 1502 flow [2023-08-30 01:13:50,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1502, PETRI_PLACES=128, PETRI_TRANSITIONS=140} [2023-08-30 01:13:50,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2023-08-30 01:13:50,622 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 140 transitions, 1502 flow [2023-08-30 01:13:50,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:13:50,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:13:50,622 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-08-30 01:13:50,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 01:13:50,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:50,823 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:13:50,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:13:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1546162737, now seen corresponding path program 1 times [2023-08-30 01:13:50,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:13:50,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98402168] [2023-08-30 01:13:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:13:50,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:13:50,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:13:50,825 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:13:50,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 01:13:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:13:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 01:13:50,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:13:50,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 01:13:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:13:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:13:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:13:55,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:13:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98402168] [2023-08-30 01:13:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98402168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:13:55,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:13:55,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-08-30 01:13:55,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068261397] [2023-08-30 01:13:55,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:13:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 01:13:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:13:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 01:13:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-08-30 01:14:21,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 371 [2023-08-30 01:14:21,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 140 transitions, 1502 flow. Second operand has 30 states, 30 states have (on average 142.03333333333333) internal successors, (4261), 30 states have internal predecessors, (4261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:14:21,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:14:21,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 371 [2023-08-30 01:14:21,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:14:30,089 WARN L222 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:14:32,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:34,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:36,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:38,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:40,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:42,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:44,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:46,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:48,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:50,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:51,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:53,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:55,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:14:56,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:15:27,483 INFO L130 PetriNetUnfolder]: 5648/10940 cut-off events. [2023-08-30 01:15:27,483 INFO L131 PetriNetUnfolder]: For 13606/13606 co-relation queries the response was YES. [2023-08-30 01:15:27,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31318 conditions, 10940 events. 5648/10940 cut-off events. For 13606/13606 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 79472 event pairs, 3900 based on Foata normal form. 56/10996 useless extension candidates. Maximal degree in co-relation 31266. Up to 2497 conditions per place. [2023-08-30 01:15:27,539 INFO L137 encePairwiseOnDemand]: 365/371 looper letters, 531 selfloop transitions, 78 changer transitions 0/609 dead transitions. [2023-08-30 01:15:27,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 609 transitions, 4934 flow [2023-08-30 01:15:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 01:15:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 01:15:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4988 transitions. [2023-08-30 01:15:27,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42014824797843664 [2023-08-30 01:15:27,558 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4988 transitions. [2023-08-30 01:15:27,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4988 transitions. [2023-08-30 01:15:27,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:15:27,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4988 transitions. [2023-08-30 01:15:27,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 155.875) internal successors, (4988), 32 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:27,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 371.0) internal successors, (12243), 33 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:27,598 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 371.0) internal successors, (12243), 33 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:27,599 INFO L175 Difference]: Start difference. First operand has 128 places, 140 transitions, 1502 flow. Second operand 32 states and 4988 transitions. [2023-08-30 01:15:27,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 609 transitions, 4934 flow [2023-08-30 01:15:27,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 609 transitions, 4793 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 01:15:27,638 INFO L231 Difference]: Finished difference. Result has 169 places, 154 transitions, 1886 flow [2023-08-30 01:15:27,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1886, PETRI_PLACES=169, PETRI_TRANSITIONS=154} [2023-08-30 01:15:27,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2023-08-30 01:15:27,639 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 154 transitions, 1886 flow [2023-08-30 01:15:27,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 142.03333333333333) internal successors, (4261), 30 states have internal predecessors, (4261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:27,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:15:27,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:15:27,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 01:15:27,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:15:27,841 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:15:27,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:15:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash -189081745, now seen corresponding path program 1 times [2023-08-30 01:15:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:15:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235202904] [2023-08-30 01:15:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:15:27,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:15:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:15:27,843 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:15:27,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 01:15:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:15:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 01:15:27,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:15:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:15:27,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:15:27,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:15:27,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235202904] [2023-08-30 01:15:27,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235202904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:15:27,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:15:27,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:15:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423970504] [2023-08-30 01:15:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:15:27,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:15:27,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:15:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:15:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:15:27,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 371 [2023-08-30 01:15:27,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 154 transitions, 1886 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:27,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:15:27,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 371 [2023-08-30 01:15:27,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:15:29,348 INFO L130 PetriNetUnfolder]: 5180/10472 cut-off events. [2023-08-30 01:15:29,348 INFO L131 PetriNetUnfolder]: For 9519/9519 co-relation queries the response was YES. [2023-08-30 01:15:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28895 conditions, 10472 events. 5180/10472 cut-off events. For 9519/9519 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 79533 event pairs, 2028 based on Foata normal form. 468/10940 useless extension candidates. Maximal degree in co-relation 28829. Up to 6553 conditions per place. [2023-08-30 01:15:29,395 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 157 selfloop transitions, 2 changer transitions 5/164 dead transitions. [2023-08-30 01:15:29,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 164 transitions, 2243 flow [2023-08-30 01:15:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:15:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:15:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-30 01:15:29,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519317160826595 [2023-08-30 01:15:29,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-30 01:15:29,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-30 01:15:29,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:15:29,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-30 01:15:29,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:29,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:29,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:29,399 INFO L175 Difference]: Start difference. First operand has 169 places, 154 transitions, 1886 flow. Second operand 3 states and 503 transitions. [2023-08-30 01:15:29,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 164 transitions, 2243 flow [2023-08-30 01:15:29,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 164 transitions, 2112 flow, removed 8 selfloop flow, removed 21 redundant places. [2023-08-30 01:15:29,420 INFO L231 Difference]: Finished difference. Result has 151 places, 155 transitions, 1769 flow [2023-08-30 01:15:29,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1769, PETRI_PLACES=151, PETRI_TRANSITIONS=155} [2023-08-30 01:15:29,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2023-08-30 01:15:29,421 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 155 transitions, 1769 flow [2023-08-30 01:15:29,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:15:29,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:15:29,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:15:29,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 01:15:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:15:29,629 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-30 01:15:29,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:15:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2037776201, now seen corresponding path program 1 times [2023-08-30 01:15:29,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:15:29,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245024365] [2023-08-30 01:15:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:15:29,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:15:29,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:15:29,631 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:15:29,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 01:15:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:15:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 01:15:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:15:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:15:30,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:15:35,337 INFO L321 Elim1Store]: treesize reduction 397, result has 76.6 percent of original size [2023-08-30 01:15:35,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 176 treesize of output 1335 Killed by 15