./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-mts.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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:52:27,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:52:27,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:52:27,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:52:27,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:52:27,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:52:27,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:52:27,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:52:27,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:52:27,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:52:27,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:52:27,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:52:27,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:52:27,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:52:27,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:52:27,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:52:27,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:52:27,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:52:27,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:52:27,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:52:27,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:52:27,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:52:27,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:52:27,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:52:27,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:52:27,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:52:27,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:52:27,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:52:27,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:52:27,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:52:27,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:52:27,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:52:27,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:52:27,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:52:27,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:52:27,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:52:27,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:52:27,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:52:27,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:52:27,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:52:27,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:52:27,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:52:27,354 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:52:27,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:52:27,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:52:27,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:52:27,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:52:27,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:52:27,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:52:27,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:52:27,357 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:52:27,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:52:27,358 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:52:27,358 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:52:27,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:52:27,359 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:52:27,360 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:52:27,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:52:27,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:52:27,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:52:27,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:52:27,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:52:27,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:52:27,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:52:27,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:52:27,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:52:27,361 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:52:27,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:52:27,361 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:52:27,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:52:27,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:52:27,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:52:27,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:52:27,655 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:52:27,657 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:52:27,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 06:52:28,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:52:28,834 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:52:28,834 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 06:52:28,845 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086ab5844/78cf748d92134550856a0102c4094750/FLAG6c98c4b67 [2023-08-30 06:52:28,855 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086ab5844/78cf748d92134550856a0102c4094750 [2023-08-30 06:52:28,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:52:28,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:52:28,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:52:28,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:52:28,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:52:28,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:52:28" (1/1) ... [2023-08-30 06:52:28,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@566e94e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:28, skipping insertion in model container [2023-08-30 06:52:28,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:52:28" (1/1) ... [2023-08-30 06:52:28,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:52:28,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:52:29,001 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-more-mts.wvr.c[2533,2546] [2023-08-30 06:52:29,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:52:29,019 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:52:29,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29c4d39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:29, skipping insertion in model container [2023-08-30 06:52:29,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:52:29,020 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:52:29,021 INFO L158 Benchmark]: Toolchain (without parser) took 162.39ms. Allocated memory is still 60.8MB. Free memory was 27.7MB in the beginning and 33.3MB in the end (delta: -5.6MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2023-08-30 06:52:29,022 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 50.3MB. Free memory was 27.3MB in the beginning and 27.2MB in the end (delta: 34.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:52:29,022 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.02ms. Allocated memory is still 60.8MB. Free memory was 27.6MB in the beginning and 33.3MB in the end (delta: -5.7MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2023-08-30 06:52:29,023 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 50.3MB. Free memory was 27.3MB in the beginning and 27.2MB in the end (delta: 34.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 152.02ms. Allocated memory is still 60.8MB. Free memory was 27.6MB in the beginning and 33.3MB in the end (delta: -5.7MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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-more-mts.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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:52:30,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:52:30,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:52:30,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:52:30,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:52:30,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:52:30,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:52:30,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:52:30,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:52:30,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:52:30,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:52:30,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:52:30,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:52:30,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:52:30,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:52:30,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:52:30,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:52:30,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:52:30,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:52:30,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:52:30,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:52:30,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:52:30,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:52:30,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:52:30,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:52:30,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:52:30,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:52:30,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:52:30,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:52:30,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:52:30,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:52:30,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:52:30,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:52:30,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:52:30,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:52:30,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:52:30,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:52:30,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:52:30,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:52:30,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:52:30,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:52:30,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:52:30,674 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:52:30,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:52:30,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:52:30,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:52:30,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:52:30,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:52:30,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:52:30,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:52:30,677 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:52:30,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:52:30,678 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:52:30,678 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:52:30,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:52:30,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:52:30,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:52:30,679 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:52:30,679 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:52:30,679 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:52:30,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:52:30,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:52:30,680 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:52:30,680 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:52:30,680 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:52:30,680 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:52:30,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:52:30,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:52:30,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:52:30,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:52:30,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:52:30,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:52:30,681 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:52:30,682 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:52:30,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:52:30,682 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:52:30,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:52:30,682 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:52:30,682 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:52:30,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:52:30,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:52:30,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:52:30,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:52:30,947 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:52:30,947 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:52:30,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 06:52:31,963 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:52:32,167 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:52:32,168 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2023-08-30 06:52:32,172 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6afe1e60/d4566c4a2d1c440ab1aa1439d8ca9204/FLAG0734c6c96 [2023-08-30 06:52:32,182 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6afe1e60/d4566c4a2d1c440ab1aa1439d8ca9204 [2023-08-30 06:52:32,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:52:32,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:52:32,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:52:32,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:52:32,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:52:32,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7379b871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32, skipping insertion in model container [2023-08-30 06:52:32,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:52:32,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:52:32,357 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-more-mts.wvr.c[2533,2546] [2023-08-30 06:52:32,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:52:32,386 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:52:32,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:52:32,412 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-more-mts.wvr.c[2533,2546] [2023-08-30 06:52:32,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:52:32,424 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:52:32,450 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-more-mts.wvr.c[2533,2546] [2023-08-30 06:52:32,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:52:32,463 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:52:32,463 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:52:32,467 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:52:32,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32 WrapperNode [2023-08-30 06:52:32,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:52:32,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:52:32,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:52:32,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:52:32,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,522 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 221 [2023-08-30 06:52:32,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:52:32,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:52:32,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:52:32,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:52:32,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:52:32,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:52:32,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:52:32,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:52:32,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (1/1) ... [2023-08-30 06:52:32,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:52:32,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:52:32,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:52:32,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:52:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:52:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:52:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:52:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:52:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:52:32,626 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:52:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:52:32,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:52:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:52:32,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:52:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:52:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:52:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:52:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:52:32,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:52:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:52:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:52:32,629 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:52:32,762 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:52:32,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:52:33,262 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:52:33,403 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:52:33,403 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:52:33,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:52:33 BoogieIcfgContainer [2023-08-30 06:52:33,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:52:33,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:52:33,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:52:33,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:52:33,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:52:32" (1/3) ... [2023-08-30 06:52:33,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9db1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:52:33, skipping insertion in model container [2023-08-30 06:52:33,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:32" (2/3) ... [2023-08-30 06:52:33,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9db1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:52:33, skipping insertion in model container [2023-08-30 06:52:33,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:52:33" (3/3) ... [2023-08-30 06:52:33,411 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-08-30 06:52:33,421 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:52:33,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 06:52:33,422 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:52:33,505 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:52:33,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 233 transitions, 490 flow [2023-08-30 06:52:33,627 INFO L130 PetriNetUnfolder]: 18/230 cut-off events. [2023-08-30 06:52:33,627 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:52:33,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 230 events. 18/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 456 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-08-30 06:52:33,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 233 transitions, 490 flow [2023-08-30 06:52:33,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 226 transitions, 470 flow [2023-08-30 06:52:33,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:52:33,655 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 226 transitions, 470 flow [2023-08-30 06:52:33,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 226 transitions, 470 flow [2023-08-30 06:52:33,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 226 transitions, 470 flow [2023-08-30 06:52:33,698 INFO L130 PetriNetUnfolder]: 18/226 cut-off events. [2023-08-30 06:52:33,698 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:52:33,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 18/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 454 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-08-30 06:52:33,705 INFO L119 LiptonReduction]: Number of co-enabled transitions 10284 [2023-08-30 06:52:54,946 INFO L134 LiptonReduction]: Checked pairs total: 11639 [2023-08-30 06:52:54,947 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-08-30 06:52:54,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:52:54,961 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;@2555318f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:52:54,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 06:52:54,963 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:52:54,963 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:52:54,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:52:54,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:52:54,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:52:54,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:52:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash 33782, now seen corresponding path program 1 times [2023-08-30 06:52:54,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:52:54,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647202082] [2023-08-30 06:52:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:52:54,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:54,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:52:54,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:52:54,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:52:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:52:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:52:55,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:52:55,205 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:52:55,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:52:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:52:55,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:52:55,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:52:55,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647202082] [2023-08-30 06:52:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647202082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:52:55,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:52:55,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:52:55,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540636576] [2023-08-30 06:52:55,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:52:55,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:52:55,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:52:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:52:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:52:55,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 06:52:55,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:55,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:55,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 06:52:55,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:52:56,604 INFO L130 PetriNetUnfolder]: 7419/9490 cut-off events. [2023-08-30 06:52:56,604 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 06:52:56,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19157 conditions, 9490 events. 7419/9490 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 45174 event pairs, 3802 based on Foata normal form. 0/3100 useless extension candidates. Maximal degree in co-relation 8432. Up to 4711 conditions per place. [2023-08-30 06:52:56,647 INFO L137 encePairwiseOnDemand]: 467/479 looper letters, 82 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-30 06:52:56,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 378 flow [2023-08-30 06:52:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:52:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:52:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 709 transitions. [2023-08-30 06:52:56,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933890048712596 [2023-08-30 06:52:56,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 709 transitions. [2023-08-30 06:52:56,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 709 transitions. [2023-08-30 06:52:56,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:52:56,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 709 transitions. [2023-08-30 06:52:56,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:56,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:56,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:56,671 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 128 flow. Second operand 3 states and 709 transitions. [2023-08-30 06:52:56,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 378 flow [2023-08-30 06:52:56,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 354 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:52:56,681 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 110 flow [2023-08-30 06:52:56,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-30 06:52:56,684 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-08-30 06:52:56,684 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 110 flow [2023-08-30 06:52:56,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:56,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:52:56,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:52:56,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:52:56,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:56,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:52:56,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:52:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 33781, now seen corresponding path program 1 times [2023-08-30 06:52:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:52:56,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63046355] [2023-08-30 06:52:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:52:56,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:56,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:52:56,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:52:56,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:52:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:52:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:52:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:52:57,012 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:52:57,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:52:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:52:57,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:52:57,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:52:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63046355] [2023-08-30 06:52:57,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63046355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:52:57,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:52:57,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:52:57,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611138820] [2023-08-30 06:52:57,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:52:57,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:52:57,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:52:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:52:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:52:57,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 06:52:57,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:57,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:57,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 06:52:57,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:52:57,927 INFO L130 PetriNetUnfolder]: 7419/9488 cut-off events. [2023-08-30 06:52:57,927 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:52:57,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 9488 events. 7419/9488 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 45141 event pairs, 3802 based on Foata normal form. 0/3095 useless extension candidates. Maximal degree in co-relation 9497. Up to 9416 conditions per place. [2023-08-30 06:52:57,974 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-30 06:52:57,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 194 flow [2023-08-30 06:52:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:52:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:52:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-30 06:52:57,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4516353514265832 [2023-08-30 06:52:57,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-30 06:52:57,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-30 06:52:57,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:52:57,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-30 06:52:57,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:57,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:57,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:57,983 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 110 flow. Second operand 3 states and 649 transitions. [2023-08-30 06:52:57,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 194 flow [2023-08-30 06:52:57,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:52:57,985 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 108 flow [2023-08-30 06:52:57,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-30 06:52:57,986 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-08-30 06:52:57,986 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 108 flow [2023-08-30 06:52:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:57,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:52:57,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:52:58,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 06:52:58,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:58,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:52:58,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:52:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash 33873, now seen corresponding path program 1 times [2023-08-30 06:52:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:52:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663455706] [2023-08-30 06:52:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:52:58,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:52:58,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:52:58,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:52:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:52:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:52:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:52:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:52:58,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:52:58,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:52:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663455706] [2023-08-30 06:52:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663455706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:52:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:52:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:52:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110669099] [2023-08-30 06:52:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:52:58,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:52:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:52:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:52:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:52:58,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 479 [2023-08-30 06:52:58,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:58,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:58,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 479 [2023-08-30 06:52:58,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:52:58,791 INFO L130 PetriNetUnfolder]: 3710/4746 cut-off events. [2023-08-30 06:52:58,791 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 06:52:58,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9508 conditions, 4746 events. 3710/4746 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 20488 event pairs, 1901 based on Foata normal form. 1/1550 useless extension candidates. Maximal degree in co-relation 9500. Up to 4710 conditions per place. [2023-08-30 06:52:58,808 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 06:52:58,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 194 flow [2023-08-30 06:52:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:52:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:52:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-08-30 06:52:58,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45789839944328464 [2023-08-30 06:52:58,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-08-30 06:52:58,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-08-30 06:52:58,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:52:58,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-08-30 06:52:58,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:58,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:58,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:58,815 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 108 flow. Second operand 3 states and 658 transitions. [2023-08-30 06:52:58,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 194 flow [2023-08-30 06:52:58,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 06:52:58,817 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 117 flow [2023-08-30 06:52:58,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-30 06:52:58,817 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-30 06:52:58,818 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 117 flow [2023-08-30 06:52:58,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:58,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:52:58,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:52:58,843 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 06:52:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:59,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:52:59,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:52:59,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1049774, now seen corresponding path program 1 times [2023-08-30 06:52:59,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:52:59,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772457077] [2023-08-30 06:52:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:52:59,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:52:59,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:52:59,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:52:59,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:52:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:52:59,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:52:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:52:59,175 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 06:52:59,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 06:52:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:52:59,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:52:59,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:52:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772457077] [2023-08-30 06:52:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772457077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:52:59,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:52:59,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:52:59,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101351269] [2023-08-30 06:52:59,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:52:59,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:52:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:52:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:52:59,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:52:59,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 06:52:59,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 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 06:52:59,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:59,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 06:52:59,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:00,000 INFO L130 PetriNetUnfolder]: 2912/3767 cut-off events. [2023-08-30 06:53:00,000 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 06:53:00,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 3767 events. 2912/3767 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 16047 event pairs, 1487 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 7545. Up to 3731 conditions per place. [2023-08-30 06:53:00,014 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 06:53:00,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 193 flow [2023-08-30 06:53:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:53:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:53:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-30 06:53:00,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509394572025052 [2023-08-30 06:53:00,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-30 06:53:00,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-30 06:53:00,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:00,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-30 06:53:00,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:00,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:00,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:00,021 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 117 flow. Second operand 3 states and 648 transitions. [2023-08-30 06:53:00,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 193 flow [2023-08-30 06:53:00,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:53:00,023 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 109 flow [2023-08-30 06:53:00,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-08-30 06:53:00,024 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2023-08-30 06:53:00,024 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 109 flow [2023-08-30 06:53:00,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 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 06:53:00,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:00,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:53:00,049 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 06:53:00,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:00,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:00,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1049683, now seen corresponding path program 1 times [2023-08-30 06:53:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:00,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850591262] [2023-08-30 06:53:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:00,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:00,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:00,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:53:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:53:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:00,387 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:53:00,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:53:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:00,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:00,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:00,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850591262] [2023-08-30 06:53:00,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850591262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:00,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:00,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:53:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308059073] [2023-08-30 06:53:00,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:53:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:53:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:53:01,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 479 [2023-08-30 06:53:01,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:01,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:01,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 479 [2023-08-30 06:53:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:02,428 INFO L130 PetriNetUnfolder]: 5827/7537 cut-off events. [2023-08-30 06:53:02,428 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:53:02,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15110 conditions, 7537 events. 5827/7537 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 35610 event pairs, 2974 based on Foata normal form. 0/2603 useless extension candidates. Maximal degree in co-relation 15100. Up to 3732 conditions per place. [2023-08-30 06:53:02,453 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 76 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2023-08-30 06:53:02,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 88 transitions, 391 flow [2023-08-30 06:53:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:53:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:53:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1270 transitions. [2023-08-30 06:53:02,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441892832289492 [2023-08-30 06:53:02,458 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1270 transitions. [2023-08-30 06:53:02,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1270 transitions. [2023-08-30 06:53:02,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:02,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1270 transitions. [2023-08-30 06:53:02,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:02,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:02,465 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:02,465 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 109 flow. Second operand 6 states and 1270 transitions. [2023-08-30 06:53:02,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 88 transitions, 391 flow [2023-08-30 06:53:02,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 88 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:53:02,468 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 186 flow [2023-08-30 06:53:02,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-30 06:53:02,469 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-08-30 06:53:02,469 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 186 flow [2023-08-30 06:53:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:02,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:02,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:53:02,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:02,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:02,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:02,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:02,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1049775, now seen corresponding path program 1 times [2023-08-30 06:53:02,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:02,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97343203] [2023-08-30 06:53:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:02,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:02,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:02,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:53:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:02,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:53:02,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:53:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:53:02,869 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 06:53:02,870 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 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 06:53:02,915 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 06:53:02,916 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 90 treesize of output 89 [2023-08-30 06:53:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:03,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:03,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97343203] [2023-08-30 06:53:03,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97343203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:03,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:03,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:53:03,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63271934] [2023-08-30 06:53:03,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:03,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:53:03,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:53:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:53:03,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 06:53:03,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:03,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:03,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 06:53:03,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:04,979 INFO L130 PetriNetUnfolder]: 5027/6556 cut-off events. [2023-08-30 06:53:04,980 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 06:53:04,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13171 conditions, 6556 events. 5027/6556 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 30925 event pairs, 2560 based on Foata normal form. 0/2352 useless extension candidates. Maximal degree in co-relation 13156. Up to 3729 conditions per place. [2023-08-30 06:53:05,013 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2023-08-30 06:53:05,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 414 flow [2023-08-30 06:53:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:53:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:53:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1436 transitions. [2023-08-30 06:53:05,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282731881896809 [2023-08-30 06:53:05,018 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1436 transitions. [2023-08-30 06:53:05,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1436 transitions. [2023-08-30 06:53:05,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:05,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1436 transitions. [2023-08-30 06:53:05,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 205.14285714285714) internal successors, (1436), 7 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:05,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:05,025 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:05,025 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 186 flow. Second operand 7 states and 1436 transitions. [2023-08-30 06:53:05,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 414 flow [2023-08-30 06:53:05,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 398 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 06:53:05,028 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 176 flow [2023-08-30 06:53:05,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2023-08-30 06:53:05,030 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-30 06:53:05,031 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 176 flow [2023-08-30 06:53:05,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:05,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:05,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:53:05,040 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 06:53:05,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:05,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:05,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1008859758, now seen corresponding path program 1 times [2023-08-30 06:53:05,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:05,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969108459] [2023-08-30 06:53:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:05,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:05,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:05,241 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:05,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:53:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:53:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:05,365 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:53:05,368 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 06:53:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:53:05,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:53:05,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:05,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969108459] [2023-08-30 06:53:05,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969108459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:53:05,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:53:05,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:53:05,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871973679] [2023-08-30 06:53:05,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:53:05,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:53:05,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:53:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:53:05,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-30 06:53:05,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 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 06:53:05,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:05,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-30 06:53:05,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:06,159 INFO L130 PetriNetUnfolder]: 4825/6282 cut-off events. [2023-08-30 06:53:06,160 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2023-08-30 06:53:06,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12777 conditions, 6282 events. 4825/6282 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 29365 event pairs, 2454 based on Foata normal form. 0/2435 useless extension candidates. Maximal degree in co-relation 12760. Up to 6210 conditions per place. [2023-08-30 06:53:06,178 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 43 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-30 06:53:06,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 47 transitions, 260 flow [2023-08-30 06:53:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:53:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:53:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-30 06:53:06,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495476687543493 [2023-08-30 06:53:06,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-30 06:53:06,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-30 06:53:06,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:06,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-30 06:53:06,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:06,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:06,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:06,184 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 176 flow. Second operand 3 states and 646 transitions. [2023-08-30 06:53:06,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 47 transitions, 260 flow [2023-08-30 06:53:06,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 234 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 06:53:06,186 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 148 flow [2023-08-30 06:53:06,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-08-30 06:53:06,186 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-08-30 06:53:06,187 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 148 flow [2023-08-30 06:53:06,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 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 06:53:06,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:06,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:53:06,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:06,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:06,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1008859757, now seen corresponding path program 1 times [2023-08-30 06:53:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:06,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347261733] [2023-08-30 06:53:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:06,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:06,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:06,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:06,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:53:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:53:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:53:06,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:53:06,575 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 06:53:06,576 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 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 06:53:06,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:53:06,754 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 06:53:06,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:06,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:06,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347261733] [2023-08-30 06:53:06,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347261733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:06,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:06,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:53:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139817812] [2023-08-30 06:53:06,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:06,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:53:06,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:06,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:53:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:53:07,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 06:53:07,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 194.25) internal successors, (1554), 8 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:07,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:07,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 06:53:07,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:08,710 INFO L130 PetriNetUnfolder]: 4623/6008 cut-off events. [2023-08-30 06:53:08,711 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 06:53:08,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12216 conditions, 6008 events. 4623/6008 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 27886 event pairs, 2348 based on Foata normal form. 0/2382 useless extension candidates. Maximal degree in co-relation 12200. Up to 3460 conditions per place. [2023-08-30 06:53:08,737 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 70 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-30 06:53:08,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 364 flow [2023-08-30 06:53:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:53:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:53:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2023-08-30 06:53:08,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334029227557411 [2023-08-30 06:53:08,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2023-08-30 06:53:08,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2023-08-30 06:53:08,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:08,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2023-08-30 06:53:08,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:08,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:08,752 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:08,752 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 148 flow. Second operand 5 states and 1038 transitions. [2023-08-30 06:53:08,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 364 flow [2023-08-30 06:53:08,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:53:08,754 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 149 flow [2023-08-30 06:53:08,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-08-30 06:53:08,756 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2023-08-30 06:53:08,756 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 149 flow [2023-08-30 06:53:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.25) internal successors, (1554), 8 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:08,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:53:08,780 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 06:53:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:08,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:08,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:08,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1208759186, now seen corresponding path program 2 times [2023-08-30 06:53:08,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:08,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897411277] [2023-08-30 06:53:08,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:53:08,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:08,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:08,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:08,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:53:09,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:53:09,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:53:09,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:53:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:53:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:53:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:53:09,123 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 06:53:09,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 06:53:09,136 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:53:09,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:53:09,216 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 06:53:09,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:53:09,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:09,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897411277] [2023-08-30 06:53:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897411277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:53:09,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:53:09,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:53:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35920346] [2023-08-30 06:53:09,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:53:09,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:53:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:53:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:53:11,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:53:13,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:53:13,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 479 [2023-08-30 06:53:13,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:13,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:13,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 479 [2023-08-30 06:53:13,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:13,917 INFO L130 PetriNetUnfolder]: 4623/6007 cut-off events. [2023-08-30 06:53:13,917 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 06:53:13,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12215 conditions, 6007 events. 4623/6007 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 27882 event pairs, 2348 based on Foata normal form. 0/2375 useless extension candidates. Maximal degree in co-relation 12198. Up to 5935 conditions per place. [2023-08-30 06:53:13,935 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 06:53:13,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 44 transitions, 225 flow [2023-08-30 06:53:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:53:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:53:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-30 06:53:13,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44467640918580376 [2023-08-30 06:53:13,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-30 06:53:13,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-30 06:53:13,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:13,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-30 06:53:13,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:13,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:13,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:13,959 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 149 flow. Second operand 3 states and 639 transitions. [2023-08-30 06:53:13,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 44 transitions, 225 flow [2023-08-30 06:53:13,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:53:13,960 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 140 flow [2023-08-30 06:53:13,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2023-08-30 06:53:13,960 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -6 predicate places. [2023-08-30 06:53:13,961 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 140 flow [2023-08-30 06:53:13,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:13,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:13,961 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:53:13,971 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 06:53:14,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:14,168 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:14,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1208759094, now seen corresponding path program 2 times [2023-08-30 06:53:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:14,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196205842] [2023-08-30 06:53:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:53:14,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:14,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:14,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:53:14,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:53:14,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:53:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:53:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:14,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:53:14,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:53:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:14,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196205842] [2023-08-30 06:53:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196205842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:14,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:14,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:53:14,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067895148] [2023-08-30 06:53:14,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:14,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:53:14,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:14,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:53:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:53:18,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 479 [2023-08-30 06:53:18,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 140 flow. Second operand has 12 states, 12 states have (on average 199.0) internal successors, (2388), 12 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:18,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:18,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 479 [2023-08-30 06:53:18,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:23,918 INFO L130 PetriNetUnfolder]: 23585/30428 cut-off events. [2023-08-30 06:53:23,918 INFO L131 PetriNetUnfolder]: For 1022/1022 co-relation queries the response was YES. [2023-08-30 06:53:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62179 conditions, 30428 events. 23585/30428 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 1617. Compared 165553 event pairs, 12015 based on Foata normal form. 6/12130 useless extension candidates. Maximal degree in co-relation 62162. Up to 3454 conditions per place. [2023-08-30 06:53:24,028 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 289 selfloop transitions, 12 changer transitions 0/304 dead transitions. [2023-08-30 06:53:24,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 304 transitions, 1378 flow [2023-08-30 06:53:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:53:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:53:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2683 transitions. [2023-08-30 06:53:24,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46677105080027836 [2023-08-30 06:53:24,035 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2683 transitions. [2023-08-30 06:53:24,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2683 transitions. [2023-08-30 06:53:24,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:24,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2683 transitions. [2023-08-30 06:53:24,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 223.58333333333334) internal successors, (2683), 12 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:24,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:24,046 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:24,046 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 140 flow. Second operand 12 states and 2683 transitions. [2023-08-30 06:53:24,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 304 transitions, 1378 flow [2023-08-30 06:53:24,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 304 transitions, 1377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:53:24,049 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 237 flow [2023-08-30 06:53:24,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-30 06:53:24,050 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-08-30 06:53:24,050 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 237 flow [2023-08-30 06:53:24,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.0) internal successors, (2388), 12 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:24,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:24,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:53:24,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:24,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:24,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:24,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1209873206, now seen corresponding path program 1 times [2023-08-30 06:53:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:24,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450780820] [2023-08-30 06:53:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:24,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:24,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:24,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:24,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:53:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:24,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:53:24,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:24,404 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:53:24,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:53:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:53:24,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:53:24,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:24,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450780820] [2023-08-30 06:53:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450780820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:53:24,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:53:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:53:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57358236] [2023-08-30 06:53:24,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:53:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:53:24,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:53:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:53:24,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-08-30 06:53:24,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:24,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:24,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-08-30 06:53:24,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:25,970 INFO L130 PetriNetUnfolder]: 12822/16955 cut-off events. [2023-08-30 06:53:25,971 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-08-30 06:53:25,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34703 conditions, 16955 events. 12822/16955 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 90866 event pairs, 6580 based on Foata normal form. 0/8089 useless extension candidates. Maximal degree in co-relation 34678. Up to 16717 conditions per place. [2023-08-30 06:53:26,016 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-30 06:53:26,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 48 transitions, 321 flow [2023-08-30 06:53:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:53:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:53:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-08-30 06:53:26,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41701461377870563 [2023-08-30 06:53:26,019 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-08-30 06:53:26,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-08-30 06:53:26,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:26,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-08-30 06:53:26,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:26,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:26,023 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:26,023 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 237 flow. Second operand 4 states and 799 transitions. [2023-08-30 06:53:26,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 48 transitions, 321 flow [2023-08-30 06:53:26,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 48 transitions, 296 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:53:26,026 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 216 flow [2023-08-30 06:53:26,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-30 06:53:26,026 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-30 06:53:26,026 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 216 flow [2023-08-30 06:53:26,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:26,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:26,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:53:26,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:26,233 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:26,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:26,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1209873207, now seen corresponding path program 1 times [2023-08-30 06:53:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:26,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438462769] [2023-08-30 06:53:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:26,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:26,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:26,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:26,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:53:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:53:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:26,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:26,467 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 25 treesize of output 21 [2023-08-30 06:53:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:26,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:26,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438462769] [2023-08-30 06:53:26,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438462769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:26,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:26,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:53:26,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173689875] [2023-08-30 06:53:26,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:26,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:53:26,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:53:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:53:28,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-08-30 06:53:28,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:28,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:28,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-08-30 06:53:28,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:31,370 INFO L130 PetriNetUnfolder]: 19941/26750 cut-off events. [2023-08-30 06:53:31,370 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2023-08-30 06:53:31,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55023 conditions, 26750 events. 19941/26750 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 1257. Compared 153271 event pairs, 5250 based on Foata normal form. 0/14026 useless extension candidates. Maximal degree in co-relation 54997. Up to 11729 conditions per place. [2023-08-30 06:53:31,494 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 139 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2023-08-30 06:53:31,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 157 transitions, 776 flow [2023-08-30 06:53:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:53:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:53:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2258 transitions. [2023-08-30 06:53:31,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4285443158094515 [2023-08-30 06:53:31,520 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2258 transitions. [2023-08-30 06:53:31,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2258 transitions. [2023-08-30 06:53:31,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:31,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2258 transitions. [2023-08-30 06:53:31,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 205.27272727272728) internal successors, (2258), 11 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:31,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:31,528 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:31,529 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 216 flow. Second operand 11 states and 2258 transitions. [2023-08-30 06:53:31,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 157 transitions, 776 flow [2023-08-30 06:53:31,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 157 transitions, 769 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:53:31,535 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 288 flow [2023-08-30 06:53:31,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=288, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2023-08-30 06:53:31,536 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 19 predicate places. [2023-08-30 06:53:31,536 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 288 flow [2023-08-30 06:53:31,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:31,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:31,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:31,543 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 (13)] Ended with exit code 0 [2023-08-30 06:53:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:31,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:31,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1148355339, now seen corresponding path program 1 times [2023-08-30 06:53:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:31,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115744152] [2023-08-30 06:53:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:31,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:31,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:31,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:53:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:53:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:31,907 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:53:31,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:53:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:32,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:32,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:32,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115744152] [2023-08-30 06:53:32,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115744152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:32,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:32,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:53:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100159354] [2023-08-30 06:53:32,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:32,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:53:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:53:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:53:34,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:53:34,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 06:53:34,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 288 flow. Second operand has 8 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:34,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:34,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 06:53:34,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:36,805 INFO L130 PetriNetUnfolder]: 16134/21847 cut-off events. [2023-08-30 06:53:36,805 INFO L131 PetriNetUnfolder]: For 9002/10240 co-relation queries the response was YES. [2023-08-30 06:53:36,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50512 conditions, 21847 events. 16134/21847 cut-off events. For 9002/10240 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 126621 event pairs, 9438 based on Foata normal form. 1238/14581 useless extension candidates. Maximal degree in co-relation 50482. Up to 19748 conditions per place. [2023-08-30 06:53:36,924 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-30 06:53:36,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 492 flow [2023-08-30 06:53:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:53:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:53:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1027 transitions. [2023-08-30 06:53:36,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42881002087682674 [2023-08-30 06:53:36,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1027 transitions. [2023-08-30 06:53:36,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1027 transitions. [2023-08-30 06:53:36,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:36,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1027 transitions. [2023-08-30 06:53:36,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.4) internal successors, (1027), 5 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:36,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:36,931 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:36,931 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 288 flow. Second operand 5 states and 1027 transitions. [2023-08-30 06:53:36,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 492 flow [2023-08-30 06:53:36,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 475 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 06:53:36,940 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 273 flow [2023-08-30 06:53:36,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-08-30 06:53:36,941 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2023-08-30 06:53:36,941 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 273 flow [2023-08-30 06:53:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:36,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:36,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:36,960 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 (14)] Ended with exit code 0 [2023-08-30 06:53:37,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:37,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:37,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:37,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1148355340, now seen corresponding path program 1 times [2023-08-30 06:53:37,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:37,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861072923] [2023-08-30 06:53:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:37,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:37,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:37,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:53:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:53:37,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:37,305 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 06:53:37,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-08-30 06:53:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:53:37,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:53:37,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:37,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861072923] [2023-08-30 06:53:37,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861072923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:53:37,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:53:37,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:53:37,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247502377] [2023-08-30 06:53:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:53:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:53:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:37,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:53:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:53:37,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 479 [2023-08-30 06:53:37,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 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 06:53:37,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:37,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 479 [2023-08-30 06:53:37,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:39,125 INFO L130 PetriNetUnfolder]: 15489/20815 cut-off events. [2023-08-30 06:53:39,126 INFO L131 PetriNetUnfolder]: For 8201/9333 co-relation queries the response was YES. [2023-08-30 06:53:39,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48133 conditions, 20815 events. 15489/20815 cut-off events. For 8201/9333 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 118758 event pairs, 8985 based on Foata normal form. 1132/13951 useless extension candidates. Maximal degree in co-relation 48104. Up to 20559 conditions per place. [2023-08-30 06:53:39,200 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 46 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 06:53:39,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 363 flow [2023-08-30 06:53:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:53:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:53:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-30 06:53:39,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363256784968685 [2023-08-30 06:53:39,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-30 06:53:39,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-30 06:53:39,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:39,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-30 06:53:39,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:39,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:39,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:39,205 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 273 flow. Second operand 3 states and 627 transitions. [2023-08-30 06:53:39,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 363 flow [2023-08-30 06:53:39,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 51 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:53:39,213 INFO L231 Difference]: Finished difference. Result has 75 places, 51 transitions, 266 flow [2023-08-30 06:53:39,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2023-08-30 06:53:39,214 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2023-08-30 06:53:39,214 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 266 flow [2023-08-30 06:53:39,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 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 06:53:39,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:39,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:39,221 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 06:53:39,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:39,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:39,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1247812592, now seen corresponding path program 1 times [2023-08-30 06:53:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183496101] [2023-08-30 06:53:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:39,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:39,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:39,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:39,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:53:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:53:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:39,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:39,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:53:39,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:53:39,664 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 70 treesize of output 68 [2023-08-30 06:53:39,667 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 68 treesize of output 66 [2023-08-30 06:53:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:39,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183496101] [2023-08-30 06:53:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183496101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:39,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:39,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:53:39,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920871902] [2023-08-30 06:53:39,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:53:39,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:53:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:53:40,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 479 [2023-08-30 06:53:40,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 266 flow. Second operand has 12 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:40,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:40,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 479 [2023-08-30 06:53:40,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:42,964 INFO L130 PetriNetUnfolder]: 17345/23084 cut-off events. [2023-08-30 06:53:42,964 INFO L131 PetriNetUnfolder]: For 9206/9206 co-relation queries the response was YES. [2023-08-30 06:53:43,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53981 conditions, 23084 events. 17345/23084 cut-off events. For 9206/9206 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 131129 event pairs, 6336 based on Foata normal form. 156/14347 useless extension candidates. Maximal degree in co-relation 53952. Up to 13985 conditions per place. [2023-08-30 06:53:43,189 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 93 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2023-08-30 06:53:43,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 600 flow [2023-08-30 06:53:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:53:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:53:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2065 transitions. [2023-08-30 06:53:43,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311064718162839 [2023-08-30 06:53:43,193 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2065 transitions. [2023-08-30 06:53:43,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2065 transitions. [2023-08-30 06:53:43,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:43,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2065 transitions. [2023-08-30 06:53:43,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.5) internal successors, (2065), 10 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:43,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:43,201 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:43,201 INFO L175 Difference]: Start difference. First operand has 75 places, 51 transitions, 266 flow. Second operand 10 states and 2065 transitions. [2023-08-30 06:53:43,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 600 flow [2023-08-30 06:53:43,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:53:43,218 INFO L231 Difference]: Finished difference. Result has 85 places, 50 transitions, 295 flow [2023-08-30 06:53:43,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=295, PETRI_PLACES=85, PETRI_TRANSITIONS=50} [2023-08-30 06:53:43,219 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 24 predicate places. [2023-08-30 06:53:43,219 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 295 flow [2023-08-30 06:53:43,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:43,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:43,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:43,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:43,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:43,443 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:43,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1239284402, now seen corresponding path program 1 times [2023-08-30 06:53:43,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:43,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183189052] [2023-08-30 06:53:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:43,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:43,445 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:43,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:53:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:53:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:43,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:43,716 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 25 treesize of output 21 [2023-08-30 06:53:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:43,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:43,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183189052] [2023-08-30 06:53:43,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183189052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:43,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:43,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:53:43,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535544033] [2023-08-30 06:53:43,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:43,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:53:43,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:53:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:53:45,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-08-30 06:53:45,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 50 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:45,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:45,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-08-30 06:53:45,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:48,824 INFO L130 PetriNetUnfolder]: 22267/30437 cut-off events. [2023-08-30 06:53:48,825 INFO L131 PetriNetUnfolder]: For 19925/21843 co-relation queries the response was YES. [2023-08-30 06:53:48,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76375 conditions, 30437 events. 22267/30437 cut-off events. For 19925/21843 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 186799 event pairs, 6361 based on Foata normal form. 1918/22731 useless extension candidates. Maximal degree in co-relation 76342. Up to 14353 conditions per place. [2023-08-30 06:53:48,954 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-08-30 06:53:48,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 841 flow [2023-08-30 06:53:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:53:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:53:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2231 transitions. [2023-08-30 06:53:48,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234200037957867 [2023-08-30 06:53:48,959 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2231 transitions. [2023-08-30 06:53:48,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2231 transitions. [2023-08-30 06:53:48,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:48,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2231 transitions. [2023-08-30 06:53:48,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 202.8181818181818) internal successors, (2231), 11 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:48,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:48,966 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:48,966 INFO L175 Difference]: Start difference. First operand has 85 places, 50 transitions, 295 flow. Second operand 11 states and 2231 transitions. [2023-08-30 06:53:48,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 841 flow [2023-08-30 06:53:48,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 827 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:53:48,993 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 354 flow [2023-08-30 06:53:48,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=354, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-08-30 06:53:48,993 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2023-08-30 06:53:48,993 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 354 flow [2023-08-30 06:53:48,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:48,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:48,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:49,001 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 (17)] Ended with exit code 0 [2023-08-30 06:53:49,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:49,201 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:49,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:49,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2085426515, now seen corresponding path program 2 times [2023-08-30 06:53:49,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:49,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254375510] [2023-08-30 06:53:49,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:53:49,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:49,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:53:49,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:53:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:53:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:53:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:49,378 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 06:53:49,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 06:53:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:49,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:49,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:53:49,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:53:49,600 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 70 treesize of output 68 [2023-08-30 06:53:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:50,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:50,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254375510] [2023-08-30 06:53:50,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254375510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:50,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:50,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:53:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038997150] [2023-08-30 06:53:50,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:50,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:53:50,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:53:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:53:53,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-08-30 06:53:53,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 192.28571428571428) internal successors, (2692), 14 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:53,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:53,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-08-30 06:53:53,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:58,689 INFO L130 PetriNetUnfolder]: 30684/41784 cut-off events. [2023-08-30 06:53:58,689 INFO L131 PetriNetUnfolder]: For 32429/35297 co-relation queries the response was YES. [2023-08-30 06:53:58,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117301 conditions, 41784 events. 30684/41784 cut-off events. For 32429/35297 co-relation queries the response was YES. Maximal size of possible extension queue 1979. Compared 269916 event pairs, 7446 based on Foata normal form. 3668/36096 useless extension candidates. Maximal degree in co-relation 117263. Up to 14273 conditions per place. [2023-08-30 06:53:58,945 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 133 selfloop transitions, 14 changer transitions 0/150 dead transitions. [2023-08-30 06:53:58,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 150 transitions, 958 flow [2023-08-30 06:53:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:53:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:53:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2035 transitions. [2023-08-30 06:53:58,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42484342379958245 [2023-08-30 06:53:58,950 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2035 transitions. [2023-08-30 06:53:58,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2035 transitions. [2023-08-30 06:53:58,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:58,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2035 transitions. [2023-08-30 06:53:58,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.5) internal successors, (2035), 10 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:58,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:58,957 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:58,957 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 354 flow. Second operand 10 states and 2035 transitions. [2023-08-30 06:53:58,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 150 transitions, 958 flow [2023-08-30 06:53:59,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 947 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:53:59,266 INFO L231 Difference]: Finished difference. Result has 103 places, 59 transitions, 407 flow [2023-08-30 06:53:59,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=407, PETRI_PLACES=103, PETRI_TRANSITIONS=59} [2023-08-30 06:53:59,267 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 42 predicate places. [2023-08-30 06:53:59,267 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 59 transitions, 407 flow [2023-08-30 06:53:59,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 192.28571428571428) internal successors, (2692), 14 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:59,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:59,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:59,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:59,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:59,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:53:59,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1246211919, now seen corresponding path program 1 times [2023-08-30 06:53:59,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:59,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102078491] [2023-08-30 06:53:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:53:59,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:59,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:59,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:53:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:53:59,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:53:59,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:59,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:59,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102078491] [2023-08-30 06:53:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102078491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:59,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:59,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-08-30 06:53:59,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910183057] [2023-08-30 06:53:59,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:59,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 06:53:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 06:53:59,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-30 06:54:00,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2023-08-30 06:54:00,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 59 transitions, 407 flow. Second operand has 11 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:00,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:00,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2023-08-30 06:54:00,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:05,691 INFO L130 PetriNetUnfolder]: 31024/42352 cut-off events. [2023-08-30 06:54:05,692 INFO L131 PetriNetUnfolder]: For 59240/61916 co-relation queries the response was YES. [2023-08-30 06:54:05,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127750 conditions, 42352 events. 31024/42352 cut-off events. For 59240/61916 co-relation queries the response was YES. Maximal size of possible extension queue 2054. Compared 272850 event pairs, 15624 based on Foata normal form. 2724/35556 useless extension candidates. Maximal degree in co-relation 127709. Up to 30409 conditions per place. [2023-08-30 06:54:06,009 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 86 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2023-08-30 06:54:06,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 753 flow [2023-08-30 06:54:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:54:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:54:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1832 transitions. [2023-08-30 06:54:06,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249594061702621 [2023-08-30 06:54:06,013 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1832 transitions. [2023-08-30 06:54:06,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1832 transitions. [2023-08-30 06:54:06,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:06,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1832 transitions. [2023-08-30 06:54:06,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.55555555555554) internal successors, (1832), 9 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:06,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:06,020 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:06,020 INFO L175 Difference]: Start difference. First operand has 103 places, 59 transitions, 407 flow. Second operand 9 states and 1832 transitions. [2023-08-30 06:54:06,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 753 flow [2023-08-30 06:54:06,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 727 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 06:54:06,091 INFO L231 Difference]: Finished difference. Result has 106 places, 57 transitions, 405 flow [2023-08-30 06:54:06,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=405, PETRI_PLACES=106, PETRI_TRANSITIONS=57} [2023-08-30 06:54:06,091 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 45 predicate places. [2023-08-30 06:54:06,092 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 57 transitions, 405 flow [2023-08-30 06:54:06,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:06,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:06,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:54:06,100 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 (19)] Ended with exit code 0 [2023-08-30 06:54:06,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:06,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:54:06,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash 40912464, now seen corresponding path program 1 times [2023-08-30 06:54:06,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:06,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665764067] [2023-08-30 06:54:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:54:06,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:06,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:06,302 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:54:06,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:54:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:54:06,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:54:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:54:06,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:54:06,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:06,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665764067] [2023-08-30 06:54:06,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665764067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:54:06,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:54:06,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:54:06,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922998268] [2023-08-30 06:54:06,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:54:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:54:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:54:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:54:06,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 479 [2023-08-30 06:54:06,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 57 transitions, 405 flow. Second operand has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:06,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:06,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 479 [2023-08-30 06:54:06,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:09,541 INFO L130 PetriNetUnfolder]: 19367/27121 cut-off events. [2023-08-30 06:54:09,541 INFO L131 PetriNetUnfolder]: For 31416/34952 co-relation queries the response was YES. [2023-08-30 06:54:09,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83120 conditions, 27121 events. 19367/27121 cut-off events. For 31416/34952 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 176540 event pairs, 13331 based on Foata normal form. 5656/26648 useless extension candidates. Maximal degree in co-relation 83078. Up to 26958 conditions per place. [2023-08-30 06:54:09,712 INFO L137 encePairwiseOnDemand]: 477/479 looper letters, 50 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-30 06:54:09,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 56 transitions, 503 flow [2023-08-30 06:54:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:54:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:54:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-30 06:54:09,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43910925539318024 [2023-08-30 06:54:09,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-30 06:54:09,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-30 06:54:09,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:09,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-30 06:54:09,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:09,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:09,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:09,716 INFO L175 Difference]: Start difference. First operand has 106 places, 57 transitions, 405 flow. Second operand 3 states and 631 transitions. [2023-08-30 06:54:09,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 56 transitions, 503 flow [2023-08-30 06:54:09,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 56 transitions, 487 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 06:54:09,755 INFO L231 Difference]: Finished difference. Result has 102 places, 56 transitions, 387 flow [2023-08-30 06:54:09,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=102, PETRI_TRANSITIONS=56} [2023-08-30 06:54:09,756 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 41 predicate places. [2023-08-30 06:54:09,756 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 56 transitions, 387 flow [2023-08-30 06:54:09,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:09,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:09,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:54:09,766 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 06:54:09,963 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 06:54:09,963 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:54:09,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1238589692, now seen corresponding path program 1 times [2023-08-30 06:54:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:09,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829958399] [2023-08-30 06:54:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:54:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:09,965 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 06:54:09,967 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 06:54:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:54:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:54:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:10,138 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:54:10,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:54:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:10,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:54:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:10,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:10,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829958399] [2023-08-30 06:54:10,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829958399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:54:10,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:54:10,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:54:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839606411] [2023-08-30 06:54:10,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:54:10,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:54:10,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:54:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:54:16,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-08-30 06:54:16,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 56 transitions, 387 flow. Second operand has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:16,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:16,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-08-30 06:54:16,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:23,212 INFO L130 PetriNetUnfolder]: 18673/27249 cut-off events. [2023-08-30 06:54:23,212 INFO L131 PetriNetUnfolder]: For 42397/46567 co-relation queries the response was YES. [2023-08-30 06:54:23,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86959 conditions, 27249 events. 18673/27249 cut-off events. For 42397/46567 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 179374 event pairs, 13709 based on Foata normal form. 4170/27878 useless extension candidates. Maximal degree in co-relation 86918. Up to 18205 conditions per place. [2023-08-30 06:54:23,362 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 116 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2023-08-30 06:54:23,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 975 flow [2023-08-30 06:54:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:54:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:54:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2177 transitions. [2023-08-30 06:54:23,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413171379768457 [2023-08-30 06:54:23,366 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2177 transitions. [2023-08-30 06:54:23,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2177 transitions. [2023-08-30 06:54:23,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:23,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2177 transitions. [2023-08-30 06:54:23,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 197.9090909090909) internal successors, (2177), 11 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:23,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:23,371 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:23,371 INFO L175 Difference]: Start difference. First operand has 102 places, 56 transitions, 387 flow. Second operand 11 states and 2177 transitions. [2023-08-30 06:54:23,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 975 flow [2023-08-30 06:54:23,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 135 transitions, 974 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:54:23,569 INFO L231 Difference]: Finished difference. Result has 113 places, 60 transitions, 440 flow [2023-08-30 06:54:23,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=440, PETRI_PLACES=113, PETRI_TRANSITIONS=60} [2023-08-30 06:54:23,569 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 52 predicate places. [2023-08-30 06:54:23,569 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 60 transitions, 440 flow [2023-08-30 06:54:23,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:23,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:23,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:54:23,577 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 06:54:23,777 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 06:54:23,777 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:54:23,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1260659726, now seen corresponding path program 2 times [2023-08-30 06:54:23,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:23,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775907236] [2023-08-30 06:54:23,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:54:23,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:23,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:23,780 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 06:54:23,784 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 06:54:23,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:54:23,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:54:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:54:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:23,976 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:54:23,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:54:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:24,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:54:24,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:54:24,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:54:24,385 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 70 treesize of output 68 [2023-08-30 06:54:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:24,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775907236] [2023-08-30 06:54:24,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775907236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:54:24,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:54:24,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:54:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179040283] [2023-08-30 06:54:24,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:54:24,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:54:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:54:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:54:29,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-08-30 06:54:29,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 60 transitions, 440 flow. Second operand has 14 states, 14 states have (on average 189.57142857142858) internal successors, (2654), 14 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:29,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:29,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-08-30 06:54:29,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:38,318 INFO L130 PetriNetUnfolder]: 25389/36045 cut-off events. [2023-08-30 06:54:38,318 INFO L131 PetriNetUnfolder]: For 58145/61059 co-relation queries the response was YES. [2023-08-30 06:54:38,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130599 conditions, 36045 events. 25389/36045 cut-off events. For 58145/61059 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 244713 event pairs, 9181 based on Foata normal form. 3462/36103 useless extension candidates. Maximal degree in co-relation 130555. Up to 11144 conditions per place. [2023-08-30 06:54:38,640 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 248 selfloop transitions, 26 changer transitions 0/279 dead transitions. [2023-08-30 06:54:38,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 279 transitions, 2103 flow [2023-08-30 06:54:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 06:54:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 06:54:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3416 transitions. [2023-08-30 06:54:38,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41950141225592535 [2023-08-30 06:54:38,647 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3416 transitions. [2023-08-30 06:54:38,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3416 transitions. [2023-08-30 06:54:38,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:38,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3416 transitions. [2023-08-30 06:54:38,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.94117647058823) internal successors, (3416), 17 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:38,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:38,659 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:38,659 INFO L175 Difference]: Start difference. First operand has 113 places, 60 transitions, 440 flow. Second operand 17 states and 3416 transitions. [2023-08-30 06:54:38,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 279 transitions, 2103 flow [2023-08-30 06:54:39,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 279 transitions, 2059 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-30 06:54:39,089 INFO L231 Difference]: Finished difference. Result has 123 places, 75 transitions, 582 flow [2023-08-30 06:54:39,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=582, PETRI_PLACES=123, PETRI_TRANSITIONS=75} [2023-08-30 06:54:39,107 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 62 predicate places. [2023-08-30 06:54:39,107 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 75 transitions, 582 flow [2023-08-30 06:54:39,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 189.57142857142858) internal successors, (2654), 14 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:39,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:39,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:54:39,121 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 06:54:39,315 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 06:54:39,315 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:54:39,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash 258430453, now seen corresponding path program 1 times [2023-08-30 06:54:39,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:39,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974616668] [2023-08-30 06:54:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:54:39,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:39,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:39,332 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 06:54:39,371 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 06:54:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:54:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:54:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:39,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:54:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:39,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974616668] [2023-08-30 06:54:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974616668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:54:39,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:54:39,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:54:39,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559142753] [2023-08-30 06:54:39,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:54:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:54:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:54:39,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:54:40,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2023-08-30 06:54:40,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 75 transitions, 582 flow. Second operand has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:40,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:40,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2023-08-30 06:54:40,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:45,239 INFO L130 PetriNetUnfolder]: 21947/32033 cut-off events. [2023-08-30 06:54:45,239 INFO L131 PetriNetUnfolder]: For 80954/85769 co-relation queries the response was YES. [2023-08-30 06:54:45,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122623 conditions, 32033 events. 21947/32033 cut-off events. For 80954/85769 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 219763 event pairs, 13253 based on Foata normal form. 4369/34513 useless extension candidates. Maximal degree in co-relation 122580. Up to 23861 conditions per place. [2023-08-30 06:54:45,433 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 116 selfloop transitions, 14 changer transitions 0/136 dead transitions. [2023-08-30 06:54:45,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 1158 flow [2023-08-30 06:54:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:54:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:54:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2033 transitions. [2023-08-30 06:54:45,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244258872651357 [2023-08-30 06:54:45,436 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2033 transitions. [2023-08-30 06:54:45,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2033 transitions. [2023-08-30 06:54:45,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:45,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2033 transitions. [2023-08-30 06:54:45,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.3) internal successors, (2033), 10 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:45,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:45,442 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:45,442 INFO L175 Difference]: Start difference. First operand has 123 places, 75 transitions, 582 flow. Second operand 10 states and 2033 transitions. [2023-08-30 06:54:45,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 1158 flow [2023-08-30 06:54:45,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 136 transitions, 1109 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-30 06:54:45,791 INFO L231 Difference]: Finished difference. Result has 126 places, 76 transitions, 589 flow [2023-08-30 06:54:45,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=589, PETRI_PLACES=126, PETRI_TRANSITIONS=76} [2023-08-30 06:54:45,793 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 65 predicate places. [2023-08-30 06:54:45,793 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 76 transitions, 589 flow [2023-08-30 06:54:45,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:45,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:45,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 06:54:45,805 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 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:54:45,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:45,999 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:54:46,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1655019014, now seen corresponding path program 3 times [2023-08-30 06:54:46,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:46,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787226804] [2023-08-30 06:54:46,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:54:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:46,002 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:54:46,004 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 (24)] Waiting until timeout for monitored process [2023-08-30 06:54:46,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:54:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:54:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:54:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:46,285 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:54:46,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:54:46,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2023-08-30 06:54:46,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:54:46,715 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 107 treesize of output 107 [2023-08-30 06:54:46,722 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 91 treesize of output 87 [2023-08-30 06:54:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:46,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:54:46,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:54:46,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:54:46,927 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 70 treesize of output 68 [2023-08-30 06:54:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:47,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:47,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787226804] [2023-08-30 06:54:47,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787226804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:54:47,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:54:47,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 06:54:47,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223465155] [2023-08-30 06:54:47,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:54:47,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:54:47,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:47,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:54:47,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:54:50,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 479 [2023-08-30 06:54:50,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 76 transitions, 589 flow. Second operand has 16 states, 16 states have (on average 186.375) internal successors, (2982), 16 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:50,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:50,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 479 [2023-08-30 06:54:50,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:56,482 INFO L130 PetriNetUnfolder]: 22994/32476 cut-off events. [2023-08-30 06:54:56,483 INFO L131 PetriNetUnfolder]: For 88692/91672 co-relation queries the response was YES. [2023-08-30 06:54:56,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137289 conditions, 32476 events. 22994/32476 cut-off events. For 88692/91672 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 219960 event pairs, 8955 based on Foata normal form. 2972/32100 useless extension candidates. Maximal degree in co-relation 137246. Up to 16753 conditions per place. [2023-08-30 06:54:56,706 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 186 selfloop transitions, 14 changer transitions 0/207 dead transitions. [2023-08-30 06:54:56,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 207 transitions, 1629 flow [2023-08-30 06:54:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:54:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:54:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2928 transitions. [2023-08-30 06:54:56,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40751565762004177 [2023-08-30 06:54:56,710 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2928 transitions. [2023-08-30 06:54:56,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2928 transitions. [2023-08-30 06:54:56,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:56,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2928 transitions. [2023-08-30 06:54:56,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 195.2) internal successors, (2928), 15 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:56,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:56,717 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:56,717 INFO L175 Difference]: Start difference. First operand has 126 places, 76 transitions, 589 flow. Second operand 15 states and 2928 transitions. [2023-08-30 06:54:56,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 207 transitions, 1629 flow [2023-08-30 06:54:57,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 1604 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 06:54:57,065 INFO L231 Difference]: Finished difference. Result has 140 places, 80 transitions, 655 flow [2023-08-30 06:54:57,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=655, PETRI_PLACES=140, PETRI_TRANSITIONS=80} [2023-08-30 06:54:57,066 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 79 predicate places. [2023-08-30 06:54:57,066 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 80 transitions, 655 flow [2023-08-30 06:54:57,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 186.375) internal successors, (2982), 16 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:57,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:57,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:54:57,091 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 (24)] Ended with exit code 0 [2023-08-30 06:54:57,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:57,278 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:54:57,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash 662040120, now seen corresponding path program 2 times [2023-08-30 06:54:57,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:57,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68138320] [2023-08-30 06:54:57,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:54:57,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:57,280 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:54:57,282 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 (25)] Waiting until timeout for monitored process [2023-08-30 06:54:57,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:54:57,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:54:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:54:57,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:57,524 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:54:57,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:54:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:57,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:54:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:54:59,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68138320] [2023-08-30 06:54:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68138320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:54:59,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:54:59,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:54:59,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918338406] [2023-08-30 06:54:59,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:54:59,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:54:59,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:54:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:55:09,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 479 [2023-08-30 06:55:09,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 80 transitions, 655 flow. Second operand has 14 states, 14 states have (on average 188.71428571428572) internal successors, (2642), 14 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:09,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:55:09,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 479 [2023-08-30 06:55:09,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:55:21,814 INFO L130 PetriNetUnfolder]: 25173/36360 cut-off events. [2023-08-30 06:55:21,814 INFO L131 PetriNetUnfolder]: For 122421/127960 co-relation queries the response was YES. [2023-08-30 06:55:21,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157019 conditions, 36360 events. 25173/36360 cut-off events. For 122421/127960 co-relation queries the response was YES. Maximal size of possible extension queue 1519. Compared 247497 event pairs, 10637 based on Foata normal form. 5217/39478 useless extension candidates. Maximal degree in co-relation 156971. Up to 9536 conditions per place. [2023-08-30 06:55:22,035 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 246 selfloop transitions, 25 changer transitions 0/278 dead transitions. [2023-08-30 06:55:22,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 278 transitions, 2351 flow [2023-08-30 06:55:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:55:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:55:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3762 transitions. [2023-08-30 06:55:22,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133611691022965 [2023-08-30 06:55:22,040 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3762 transitions. [2023-08-30 06:55:22,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3762 transitions. [2023-08-30 06:55:22,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:55:22,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3762 transitions. [2023-08-30 06:55:22,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 198.0) internal successors, (3762), 19 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:22,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 479.0) internal successors, (9580), 20 states have internal predecessors, (9580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:22,047 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 479.0) internal successors, (9580), 20 states have internal predecessors, (9580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:22,047 INFO L175 Difference]: Start difference. First operand has 140 places, 80 transitions, 655 flow. Second operand 19 states and 3762 transitions. [2023-08-30 06:55:22,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 278 transitions, 2351 flow [2023-08-30 06:55:22,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 278 transitions, 2306 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 06:55:22,513 INFO L231 Difference]: Finished difference. Result has 155 places, 89 transitions, 768 flow [2023-08-30 06:55:22,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=768, PETRI_PLACES=155, PETRI_TRANSITIONS=89} [2023-08-30 06:55:22,513 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 94 predicate places. [2023-08-30 06:55:22,514 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 89 transitions, 768 flow [2023-08-30 06:55:22,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 188.71428571428572) internal successors, (2642), 14 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:22,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:55:22,514 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 06:55:22,522 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 (25)] Forceful destruction successful, exit code 0 [2023-08-30 06:55:22,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:55:22,722 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:55:22,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:55:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2058628681, now seen corresponding path program 4 times [2023-08-30 06:55:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:55:22,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931645590] [2023-08-30 06:55:22,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:55:22,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:55:22,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:55:22,724 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:55:22,725 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 (26)] Waiting until timeout for monitored process [2023-08-30 06:55:22,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:55:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:55:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:55:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:55:22,953 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:55:22,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:55:23,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 06:55:23,234 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 79 treesize of output 75 [2023-08-30 06:55:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:23,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:55:23,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:55:23,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:55:23,500 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 70 treesize of output 68 [2023-08-30 06:55:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:24,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:55:24,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931645590] [2023-08-30 06:55:24,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931645590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:55:24,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:55:24,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:55:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105736866] [2023-08-30 06:55:24,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:55:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:55:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:55:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:55:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:55:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-08-30 06:55:31,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 89 transitions, 768 flow. Second operand has 18 states, 18 states have (on average 185.33333333333334) internal successors, (3336), 18 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:31,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:55:31,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-08-30 06:55:31,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:55:46,737 INFO L130 PetriNetUnfolder]: 30921/43945 cut-off events. [2023-08-30 06:55:46,738 INFO L131 PetriNetUnfolder]: For 267388/273701 co-relation queries the response was YES. [2023-08-30 06:55:47,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216975 conditions, 43945 events. 30921/43945 cut-off events. For 267388/273701 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 307385 event pairs, 9041 based on Foata normal form. 6323/50200 useless extension candidates. Maximal degree in co-relation 216924. Up to 13135 conditions per place. [2023-08-30 06:55:47,226 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 413 selfloop transitions, 41 changer transitions 0/463 dead transitions. [2023-08-30 06:55:47,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 463 transitions, 4051 flow [2023-08-30 06:55:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 06:55:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 06:55:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4926 transitions. [2023-08-30 06:55:47,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411356993736952 [2023-08-30 06:55:47,244 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4926 transitions. [2023-08-30 06:55:47,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4926 transitions. [2023-08-30 06:55:47,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:55:47,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4926 transitions. [2023-08-30 06:55:47,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 197.04) internal successors, (4926), 25 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:47,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 479.0) internal successors, (12454), 26 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:47,254 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 479.0) internal successors, (12454), 26 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:47,254 INFO L175 Difference]: Start difference. First operand has 155 places, 89 transitions, 768 flow. Second operand 25 states and 4926 transitions. [2023-08-30 06:55:47,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 463 transitions, 4051 flow [2023-08-30 06:55:48,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 463 transitions, 3940 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-08-30 06:55:48,058 INFO L231 Difference]: Finished difference. Result has 174 places, 110 transitions, 1052 flow [2023-08-30 06:55:48,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1052, PETRI_PLACES=174, PETRI_TRANSITIONS=110} [2023-08-30 06:55:48,059 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 113 predicate places. [2023-08-30 06:55:48,059 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 110 transitions, 1052 flow [2023-08-30 06:55:48,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 185.33333333333334) internal successors, (3336), 18 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:48,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:55:48,060 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:55:48,071 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 (26)] Forceful destruction successful, exit code 0 [2023-08-30 06:55:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:55:48,264 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:55:48,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:55:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash -441930218, now seen corresponding path program 3 times [2023-08-30 06:55:48,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:55:48,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658155039] [2023-08-30 06:55:48,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:55:48,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:55:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:55:48,266 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:55:48,268 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 (27)] Waiting until timeout for monitored process [2023-08-30 06:55:48,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:55:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:55:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:55:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:55:48,552 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:55:48,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:55:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:48,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:55:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:50,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:55:50,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658155039] [2023-08-30 06:55:50,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658155039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:55:50,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:55:50,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:55:50,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188581220] [2023-08-30 06:55:50,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:55:50,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:55:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:55:50,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:55:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:56:03,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 479 [2023-08-30 06:56:03,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 110 transitions, 1052 flow. Second operand has 24 states, 24 states have (on average 199.0) internal successors, (4776), 24 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:03,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:03,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 479 [2023-08-30 06:56:03,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:33,901 INFO L130 PetriNetUnfolder]: 57365/81069 cut-off events. [2023-08-30 06:56:33,901 INFO L131 PetriNetUnfolder]: For 502166/517285 co-relation queries the response was YES. [2023-08-30 06:56:34,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410574 conditions, 81069 events. 57365/81069 cut-off events. For 502166/517285 co-relation queries the response was YES. Maximal size of possible extension queue 2463. Compared 568403 event pairs, 41905 based on Foata normal form. 12287/93286 useless extension candidates. Maximal degree in co-relation 410520. Up to 23713 conditions per place. [2023-08-30 06:56:34,878 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 641 selfloop transitions, 24 changer transitions 0/679 dead transitions. [2023-08-30 06:56:34,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 679 transitions, 6261 flow [2023-08-30 06:56:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:56:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:56:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5287 transitions. [2023-08-30 06:56:34,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598990953375087 [2023-08-30 06:56:34,885 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5287 transitions. [2023-08-30 06:56:34,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5287 transitions. [2023-08-30 06:56:34,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:34,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5287 transitions. [2023-08-30 06:56:34,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 220.29166666666666) internal successors, (5287), 24 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:34,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:34,912 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:34,912 INFO L175 Difference]: Start difference. First operand has 174 places, 110 transitions, 1052 flow. Second operand 24 states and 5287 transitions. [2023-08-30 06:56:34,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 679 transitions, 6261 flow [2023-08-30 06:56:39,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 679 transitions, 6052 flow, removed 85 selfloop flow, removed 14 redundant places. [2023-08-30 06:56:39,043 INFO L231 Difference]: Finished difference. Result has 196 places, 123 transitions, 1155 flow [2023-08-30 06:56:39,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1155, PETRI_PLACES=196, PETRI_TRANSITIONS=123} [2023-08-30 06:56:39,043 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 135 predicate places. [2023-08-30 06:56:39,043 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 123 transitions, 1155 flow [2023-08-30 06:56:39,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 199.0) internal successors, (4776), 24 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:39,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:39,044 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:39,055 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 (27)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:39,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:56:39,252 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:56:39,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1298889409, now seen corresponding path program 2 times [2023-08-30 06:56:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:56:39,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467673039] [2023-08-30 06:56:39,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:56:39,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:56:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:56:39,270 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:56:39,271 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 (28)] Waiting until timeout for monitored process [2023-08-30 06:56:39,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:56:39,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:56:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:39,491 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:56:39,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:56:39,669 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 06:56:39,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:56:39,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:56:39,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467673039] [2023-08-30 06:56:39,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467673039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:39,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:39,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:56:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674931431] [2023-08-30 06:56:39,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:39,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:56:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:56:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:56:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:56:40,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-08-30 06:56:40,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 123 transitions, 1155 flow. Second operand has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:40,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:40,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-08-30 06:56:40,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:53,797 INFO L130 PetriNetUnfolder]: 58699/85002 cut-off events. [2023-08-30 06:56:53,797 INFO L131 PetriNetUnfolder]: For 480152/494840 co-relation queries the response was YES. [2023-08-30 06:56:54,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404581 conditions, 85002 events. 58699/85002 cut-off events. For 480152/494840 co-relation queries the response was YES. Maximal size of possible extension queue 2064. Compared 618227 event pairs, 39436 based on Foata normal form. 19112/103952 useless extension candidates. Maximal degree in co-relation 404517. Up to 70706 conditions per place. [2023-08-30 06:56:54,950 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 147 selfloop transitions, 21 changer transitions 0/177 dead transitions. [2023-08-30 06:56:54,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 177 transitions, 1927 flow [2023-08-30 06:56:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:56:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:56:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1009 transitions. [2023-08-30 06:56:54,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421294363256785 [2023-08-30 06:56:54,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1009 transitions. [2023-08-30 06:56:54,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1009 transitions. [2023-08-30 06:56:54,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:54,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1009 transitions. [2023-08-30 06:56:54,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:54,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:54,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:54,956 INFO L175 Difference]: Start difference. First operand has 196 places, 123 transitions, 1155 flow. Second operand 5 states and 1009 transitions. [2023-08-30 06:56:54,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 177 transitions, 1927 flow [2023-08-30 06:57:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 177 transitions, 1871 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-30 06:57:01,771 INFO L231 Difference]: Finished difference. Result has 190 places, 123 transitions, 1159 flow [2023-08-30 06:57:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1159, PETRI_PLACES=190, PETRI_TRANSITIONS=123} [2023-08-30 06:57:01,772 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 129 predicate places. [2023-08-30 06:57:01,772 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 123 transitions, 1159 flow [2023-08-30 06:57:01,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:01,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:01,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:57:01,780 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 06:57:01,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:01,979 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:57:01,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash 313376625, now seen corresponding path program 3 times [2023-08-30 06:57:01,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:01,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580824611] [2023-08-30 06:57:01,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:57:01,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:01,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:01,981 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:01,983 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 (29)] Waiting until timeout for monitored process [2023-08-30 06:57:02,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:57:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:57:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:57:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:02,230 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:57:02,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:57:02,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 06:57:02,561 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 79 treesize of output 75 [2023-08-30 06:57:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:02,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:57:02,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:57:02,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:57:02,856 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 70 treesize of output 68 [2023-08-30 06:57:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:03,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:03,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580824611] [2023-08-30 06:57:03,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580824611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:57:03,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:57:03,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 06:57:03,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831935423] [2023-08-30 06:57:03,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:57:03,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:57:03,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:57:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:57:11,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 479 [2023-08-30 06:57:11,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 123 transitions, 1159 flow. Second operand has 16 states, 16 states have (on average 181.625) internal successors, (2906), 16 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:11,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:11,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 479 [2023-08-30 06:57:11,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:30,191 INFO L130 PetriNetUnfolder]: 52027/75250 cut-off events. [2023-08-30 06:57:30,191 INFO L131 PetriNetUnfolder]: For 724872/744549 co-relation queries the response was YES. [2023-08-30 06:57:30,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387706 conditions, 75250 events. 52027/75250 cut-off events. For 724872/744549 co-relation queries the response was YES. Maximal size of possible extension queue 1809. Compared 539567 event pairs, 17077 based on Foata normal form. 18991/94124 useless extension candidates. Maximal degree in co-relation 387640. Up to 28904 conditions per place. [2023-08-30 06:57:31,368 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 361 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2023-08-30 06:57:31,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 403 transitions, 3969 flow [2023-08-30 06:57:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 06:57:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 06:57:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4018 transitions. [2023-08-30 06:57:31,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944328462073764 [2023-08-30 06:57:31,372 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4018 transitions. [2023-08-30 06:57:31,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4018 transitions. [2023-08-30 06:57:31,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:31,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4018 transitions. [2023-08-30 06:57:31,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 191.33333333333334) internal successors, (4018), 21 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:31,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:31,381 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:31,381 INFO L175 Difference]: Start difference. First operand has 190 places, 123 transitions, 1159 flow. Second operand 21 states and 4018 transitions. [2023-08-30 06:57:31,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 403 transitions, 3969 flow [2023-08-30 06:57:36,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 403 transitions, 3850 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-08-30 06:57:36,780 INFO L231 Difference]: Finished difference. Result has 208 places, 127 transitions, 1217 flow [2023-08-30 06:57:36,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1217, PETRI_PLACES=208, PETRI_TRANSITIONS=127} [2023-08-30 06:57:36,785 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 147 predicate places. [2023-08-30 06:57:36,785 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 127 transitions, 1217 flow [2023-08-30 06:57:36,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 181.625) internal successors, (2906), 16 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:36,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:36,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:57:36,794 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 (29)] Ended with exit code 0 [2023-08-30 06:57:36,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:36,991 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:57:36,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:36,991 INFO L85 PathProgramCache]: Analyzing trace with hash 370245828, now seen corresponding path program 3 times [2023-08-30 06:57:36,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:57:36,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668990414] [2023-08-30 06:57:36,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:57:36,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:57:36,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:57:36,993 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:57:36,994 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 (30)] Waiting until timeout for monitored process [2023-08-30 06:57:37,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:57:37,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:57:37,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:57:37,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:37,248 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:57:37,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:57:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:57:37,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:57:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:57:39,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:57:39,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668990414] [2023-08-30 06:57:39,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668990414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:57:39,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:57:39,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:57:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373318106] [2023-08-30 06:57:39,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:57:39,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:57:39,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:57:39,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:57:39,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:57:40,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:57:50,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2023-08-30 06:57:50,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 127 transitions, 1217 flow. Second operand has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:50,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:50,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2023-08-30 06:57:50,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:06,055 INFO L130 PetriNetUnfolder]: 62385/90685 cut-off events. [2023-08-30 06:58:06,055 INFO L131 PetriNetUnfolder]: For 518290/535282 co-relation queries the response was YES. [2023-08-30 06:58:06,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453180 conditions, 90685 events. 62385/90685 cut-off events. For 518290/535282 co-relation queries the response was YES. Maximal size of possible extension queue 2183. Compared 673885 event pairs, 10015 based on Foata normal form. 19988/110517 useless extension candidates. Maximal degree in co-relation 453112. Up to 31046 conditions per place. [2023-08-30 06:58:07,211 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 269 selfloop transitions, 23 changer transitions 0/301 dead transitions. [2023-08-30 06:58:07,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 301 transitions, 3299 flow [2023-08-30 06:58:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:58:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:58:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1417 transitions. [2023-08-30 06:58:07,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226066209364748 [2023-08-30 06:58:07,214 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1417 transitions. [2023-08-30 06:58:07,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1417 transitions. [2023-08-30 06:58:07,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:07,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1417 transitions. [2023-08-30 06:58:07,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.42857142857142) internal successors, (1417), 7 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:07,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:07,217 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:07,218 INFO L175 Difference]: Start difference. First operand has 208 places, 127 transitions, 1217 flow. Second operand 7 states and 1417 transitions. [2023-08-30 06:58:07,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 301 transitions, 3299 flow [2023-08-30 06:58:11,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 301 transitions, 3191 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-08-30 06:58:11,616 INFO L231 Difference]: Finished difference. Result has 202 places, 127 transitions, 1220 flow [2023-08-30 06:58:11,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=202, PETRI_TRANSITIONS=127} [2023-08-30 06:58:11,618 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 141 predicate places. [2023-08-30 06:58:11,618 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 127 transitions, 1220 flow [2023-08-30 06:58:11,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:11,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:58:11,619 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 06:58:11,630 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 (30)] Ended with exit code 0 [2023-08-30 06:58:11,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:11,828 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:58:11,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:58:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1637588318, now seen corresponding path program 5 times [2023-08-30 06:58:11,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:58:11,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137982533] [2023-08-30 06:58:11,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:58:11,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:58:11,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:58:11,831 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:58:11,832 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 (31)] Waiting until timeout for monitored process [2023-08-30 06:58:12,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 06:58:12,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:58:12,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:58:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:58:12,187 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:58:12,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:58:12,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 06:58:12,799 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 79 treesize of output 75 [2023-08-30 06:58:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:12,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:58:13,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:58:13,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:58:13,583 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 70 treesize of output 68 [2023-08-30 06:58:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:58:14,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:58:14,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137982533] [2023-08-30 06:58:14,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137982533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:58:14,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:58:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-30 06:58:14,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147609384] [2023-08-30 06:58:14,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:58:14,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 06:58:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:58:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 06:58:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-08-30 06:58:26,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-08-30 06:58:26,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 127 transitions, 1220 flow. Second operand has 20 states, 20 states have (on average 182.4) internal successors, (3648), 20 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:26,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:58:26,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-08-30 06:58:26,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:58:57,385 INFO L130 PetriNetUnfolder]: 56340/81953 cut-off events. [2023-08-30 06:58:57,386 INFO L131 PetriNetUnfolder]: For 623152/641219 co-relation queries the response was YES. [2023-08-30 06:58:58,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412164 conditions, 81953 events. 56340/81953 cut-off events. For 623152/641219 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 601569 event pairs, 13175 based on Foata normal form. 16387/98270 useless extension candidates. Maximal degree in co-relation 412096. Up to 35280 conditions per place. [2023-08-30 06:58:58,359 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 588 selfloop transitions, 54 changer transitions 0/651 dead transitions. [2023-08-30 06:58:58,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 651 transitions, 6049 flow [2023-08-30 06:58:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 06:58:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 06:58:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7089 transitions. [2023-08-30 06:58:58,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39998871522879875 [2023-08-30 06:58:58,378 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7089 transitions. [2023-08-30 06:58:58,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7089 transitions. [2023-08-30 06:58:58,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:58:58,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7089 transitions. [2023-08-30 06:58:58,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 191.59459459459458) internal successors, (7089), 37 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:58,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 479.0) internal successors, (18202), 38 states have internal predecessors, (18202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:58,405 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 479.0) internal successors, (18202), 38 states have internal predecessors, (18202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:58:58,405 INFO L175 Difference]: Start difference. First operand has 202 places, 127 transitions, 1220 flow. Second operand 37 states and 7089 transitions. [2023-08-30 06:58:58,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 651 transitions, 6049 flow [2023-08-30 06:59:03,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 651 transitions, 5938 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-30 06:59:03,504 INFO L231 Difference]: Finished difference. Result has 236 places, 133 transitions, 1356 flow [2023-08-30 06:59:03,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1356, PETRI_PLACES=236, PETRI_TRANSITIONS=133} [2023-08-30 06:59:03,505 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 175 predicate places. [2023-08-30 06:59:03,505 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 133 transitions, 1356 flow [2023-08-30 06:59:03,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.4) internal successors, (3648), 20 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:03,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:59:03,505 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:59:03,516 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 06:59:03,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:03,714 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 06:59:03,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:59:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash 640261326, now seen corresponding path program 4 times [2023-08-30 06:59:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:59:03,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499910990] [2023-08-30 06:59:03,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:59:03,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:59:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:59:03,716 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:59:03,718 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 (32)] Waiting until timeout for monitored process [2023-08-30 06:59:03,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:59:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:59:03,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:59:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:59:03,940 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:59:03,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:59:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:59:04,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:59:04,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:59:04,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 06:59:04,490 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 70 treesize of output 68 [2023-08-30 06:59:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:59:05,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:59:05,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499910990] [2023-08-30 06:59:05,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499910990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:59:05,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:59:05,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 06:59:05,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401358551] [2023-08-30 06:59:05,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:59:05,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 06:59:05,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:59:05,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 06:59:05,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-08-30 06:59:17,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-08-30 06:59:17,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 133 transitions, 1356 flow. Second operand has 22 states, 22 states have (on average 189.36363636363637) internal successors, (4166), 22 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:17,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:59:17,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-08-30 06:59:17,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:59:49,738 INFO L130 PetriNetUnfolder]: 78699/114474 cut-off events. [2023-08-30 06:59:49,738 INFO L131 PetriNetUnfolder]: For 943143/965209 co-relation queries the response was YES. [2023-08-30 06:59:50,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599689 conditions, 114474 events. 78699/114474 cut-off events. For 943143/965209 co-relation queries the response was YES. Maximal size of possible extension queue 2954. Compared 858349 event pairs, 28817 based on Foata normal form. 22718/137169 useless extension candidates. Maximal degree in co-relation 599618. Up to 25500 conditions per place. [2023-08-30 06:59:51,275 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 846 selfloop transitions, 65 changer transitions 0/921 dead transitions. [2023-08-30 06:59:51,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 921 transitions, 9732 flow [2023-08-30 06:59:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 06:59:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 06:59:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 8834 transitions. [2023-08-30 06:59:51,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41914974378439934 [2023-08-30 06:59:51,282 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 8834 transitions. [2023-08-30 06:59:51,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 8834 transitions. [2023-08-30 06:59:51,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:59:51,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 8834 transitions. [2023-08-30 06:59:51,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 200.77272727272728) internal successors, (8834), 44 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:51,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 479.0) internal successors, (21555), 45 states have internal predecessors, (21555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:51,298 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 479.0) internal successors, (21555), 45 states have internal predecessors, (21555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:59:51,298 INFO L175 Difference]: Start difference. First operand has 236 places, 133 transitions, 1356 flow. Second operand 44 states and 8834 transitions. [2023-08-30 06:59:51,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 921 transitions, 9732 flow [2023-08-30 07:00:00,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 921 transitions, 9197 flow, removed 44 selfloop flow, removed 30 redundant places. [2023-08-30 07:00:00,954 INFO L231 Difference]: Finished difference. Result has 260 places, 167 transitions, 1846 flow [2023-08-30 07:00:00,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1846, PETRI_PLACES=260, PETRI_TRANSITIONS=167} [2023-08-30 07:00:00,954 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 199 predicate places. [2023-08-30 07:00:00,954 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 167 transitions, 1846 flow [2023-08-30 07:00:00,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 189.36363636363637) internal successors, (4166), 22 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states 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 07:00:00,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:00,955 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:00:00,963 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 (32)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:01,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 07:00:01,163 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:00:01,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash -521089833, now seen corresponding path program 5 times [2023-08-30 07:00:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:01,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360513676] [2023-08-30 07:00:01,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:00:01,164 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 07:00:01,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:01,165 INFO L229 MonitoredProcess]: Starting monitored process 33 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 07:00:01,167 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 (33)] Waiting until timeout for monitored process [2023-08-30 07:00:01,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 07:00:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:00:01,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:00:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:01,441 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:00:01,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:00:01,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 07:00:01,905 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 79 treesize of output 75 [2023-08-30 07:00:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:01,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:02,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:00:02,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 07:00:02,297 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 70 treesize of output 68 [2023-08-30 07:00:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:03,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:03,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360513676] [2023-08-30 07:00:03,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360513676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:03,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:03,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 07:00:03,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293971437] [2023-08-30 07:00:03,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:00:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:00:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-30 07:00:17,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-08-30 07:00:17,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 167 transitions, 1846 flow. Second operand has 20 states, 20 states have (on average 182.5) internal successors, (3650), 20 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states 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 07:00:17,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:17,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-08-30 07:00:17,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:45,076 INFO L130 PetriNetUnfolder]: 77767/113087 cut-off events. [2023-08-30 07:00:45,076 INFO L131 PetriNetUnfolder]: For 1029049/1050995 co-relation queries the response was YES. [2023-08-30 07:00:46,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616934 conditions, 113087 events. 77767/113087 cut-off events. For 1029049/1050995 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 847818 event pairs, 43309 based on Foata normal form. 20564/133516 useless extension candidates. Maximal degree in co-relation 616855. Up to 74069 conditions per place. [2023-08-30 07:00:47,174 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 387 selfloop transitions, 38 changer transitions 0/435 dead transitions. [2023-08-30 07:00:47,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 435 transitions, 4382 flow [2023-08-30 07:00:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:00:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:00:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4588 transitions. [2023-08-30 07:00:47,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990953375086987 [2023-08-30 07:00:47,181 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4588 transitions. [2023-08-30 07:00:47,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4588 transitions. [2023-08-30 07:00:47,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:47,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4588 transitions. [2023-08-30 07:00:47,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 191.16666666666666) internal successors, (4588), 24 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states 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 07:00:47,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states 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 07:00:47,190 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states 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 07:00:47,190 INFO L175 Difference]: Start difference. First operand has 260 places, 167 transitions, 1846 flow. Second operand 24 states and 4588 transitions. [2023-08-30 07:00:47,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 435 transitions, 4382 flow [2023-08-30 07:00:55,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 435 transitions, 4200 flow, removed 30 selfloop flow, removed 25 redundant places. [2023-08-30 07:00:55,151 INFO L231 Difference]: Finished difference. Result has 260 places, 168 transitions, 1745 flow [2023-08-30 07:00:55,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1745, PETRI_PLACES=260, PETRI_TRANSITIONS=168} [2023-08-30 07:00:55,151 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 199 predicate places. [2023-08-30 07:00:55,152 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 168 transitions, 1745 flow [2023-08-30 07:00:55,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.5) internal successors, (3650), 20 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states 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 07:00:55,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:55,152 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 07:00:55,161 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 (33)] Ended with exit code 0 [2023-08-30 07:00:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 07:00:55,361 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:00:55,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1811749082, now seen corresponding path program 6 times [2023-08-30 07:00:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:55,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126706770] [2023-08-30 07:00:55,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:00:55,362 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 07:00:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:55,363 INFO L229 MonitoredProcess]: Starting monitored process 34 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 07:00:55,364 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 (34)] Waiting until timeout for monitored process [2023-08-30 07:00:55,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 07:00:55,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:00:55,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 07:00:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:55,672 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:00:55,672 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:00:56,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 59 [2023-08-30 07:00:56,155 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 79 treesize of output 75 [2023-08-30 07:00:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:56,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:56,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:00:56,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 07:00:56,523 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 70 treesize of output 68 [2023-08-30 07:00:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:58,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126706770] [2023-08-30 07:00:58,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126706770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:58,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:58,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2023-08-30 07:00:58,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999880790] [2023-08-30 07:00:58,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:58,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 07:00:58,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 07:00:58,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2023-08-30 07:01:17,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 479 [2023-08-30 07:01:17,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 168 transitions, 1745 flow. Second operand has 28 states, 28 states have (on average 185.21428571428572) internal successors, (5186), 28 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states 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 07:01:17,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:01:17,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 479 [2023-08-30 07:01:17,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:02:17,411 INFO L130 PetriNetUnfolder]: 72476/105641 cut-off events. [2023-08-30 07:02:17,411 INFO L131 PetriNetUnfolder]: For 1177613/1199603 co-relation queries the response was YES. [2023-08-30 07:02:18,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584079 conditions, 105641 events. 72476/105641 cut-off events. For 1177613/1199603 co-relation queries the response was YES. Maximal size of possible extension queue 2591. Compared 799032 event pairs, 22467 based on Foata normal form. 21610/127195 useless extension candidates. Maximal degree in co-relation 584005. Up to 23401 conditions per place. [2023-08-30 07:02:19,163 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 1159 selfloop transitions, 105 changer transitions 0/1277 dead transitions. [2023-08-30 07:02:19,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1277 transitions, 12919 flow [2023-08-30 07:02:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 07:02:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 07:02:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 13201 transitions. [2023-08-30 07:02:19,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41133580531580094 [2023-08-30 07:02:19,173 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 13201 transitions. [2023-08-30 07:02:19,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 13201 transitions. [2023-08-30 07:02:19,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:02:19,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 13201 transitions. [2023-08-30 07:02:19,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 197.02985074626866) internal successors, (13201), 67 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states 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 07:02:19,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 479.0) internal successors, (32572), 68 states have internal predecessors, (32572), 0 states have call successors, (0), 0 states 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 07:02:19,198 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 479.0) internal successors, (32572), 68 states have internal predecessors, (32572), 0 states have call successors, (0), 0 states 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 07:02:19,198 INFO L175 Difference]: Start difference. First operand has 260 places, 168 transitions, 1745 flow. Second operand 67 states and 13201 transitions. [2023-08-30 07:02:19,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1277 transitions, 12919 flow [2023-08-30 07:02:33,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1277 transitions, 12677 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-30 07:02:33,519 INFO L231 Difference]: Finished difference. Result has 321 places, 217 transitions, 2569 flow [2023-08-30 07:02:33,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=2569, PETRI_PLACES=321, PETRI_TRANSITIONS=217} [2023-08-30 07:02:33,519 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 260 predicate places. [2023-08-30 07:02:33,520 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 217 transitions, 2569 flow [2023-08-30 07:02:33,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 185.21428571428572) internal successors, (5186), 28 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states 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 07:02:33,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:02:33,520 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-08-30 07:02:33,531 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 (34)] Forceful destruction successful, exit code 0 [2023-08-30 07:02:33,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 07:02:33,729 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:02:33,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:02:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash 712900184, now seen corresponding path program 7 times [2023-08-30 07:02:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:02:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122708806] [2023-08-30 07:02:33,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:02:33,730 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 07:02:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:02:33,731 INFO L229 MonitoredProcess]: Starting monitored process 35 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 07:02:33,733 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 (35)] Waiting until timeout for monitored process [2023-08-30 07:02:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:02:33,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:02:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:02:34,050 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:02:34,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:02:36,616 INFO L321 Elim1Store]: treesize reduction 320, result has 0.3 percent of original size [2023-08-30 07:02:36,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 266 treesize of output 159 [2023-08-30 07:02:36,623 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 159 treesize of output 155 [2023-08-30 07:02:36,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:02:36,651 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 167 treesize of output 167 [2023-08-30 07:02:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:02:36,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:02:37,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:02:37,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2023-08-30 07:02:37,151 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 70 treesize of output 68 [2023-08-30 07:02:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:02:37,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:02:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122708806] [2023-08-30 07:02:37,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122708806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:02:37,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:02:37,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:02:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303400085] [2023-08-30 07:02:37,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:02:37,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:02:37,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:02:37,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:02:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:02:50,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2023-08-30 07:02:50,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 217 transitions, 2569 flow. Second operand has 24 states, 24 states have (on average 182.41666666666666) internal successors, (4378), 24 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states 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 07:02:50,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:02:50,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2023-08-30 07:02:50,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand