./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.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-bad-buffer-mult-alt2.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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --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 06:01:20,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:01:20,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:01:20,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:01:20,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:01:20,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:01:20,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:01:20,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:01:20,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:01:20,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:01:20,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:01:20,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:01:20,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:01:20,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:01:20,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:01:20,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:01:20,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:01:20,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:01:20,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:01:20,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:01:20,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:01:20,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:01:20,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:01:20,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:01:20,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:01:20,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:01:20,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:01:20,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:01:20,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:01:20,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:01:20,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:01:20,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:01:20,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:01:20,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:01:20,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:01:20,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:01:20,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:01:20,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:01:20,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:01:20,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:01:20,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:01:20,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:01:20,699 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:01:20,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:01:20,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:01:20,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:01:20,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:01:20,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:01:20,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:01:20,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:01:20,701 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:01:20,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:01:20,701 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:01:20,701 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:01:20,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:01:20,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:01:20,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:01:20,702 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:01:20,702 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:01:20,702 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:01:20,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:01:20,703 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:01:20,703 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:01:20,706 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:01:20,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:01:20,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:01:20,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:01:20,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:01:20,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:01:20,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:01:20,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:01:20,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:01:20,709 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:01:20,709 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:01:20,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:01:20,710 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:01:20,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:01:20,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:01:20,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:01:20,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:01:20,987 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:01:20,987 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:01:20,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-30 06:01:22,081 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:01:22,262 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:01:22,267 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-30 06:01:22,274 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641bf146a/b7cd80a5acb34206aed8dcc3292451c1/FLAG11ba35f00 [2023-08-30 06:01:22,295 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641bf146a/b7cd80a5acb34206aed8dcc3292451c1 [2023-08-30 06:01:22,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:01:22,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:01:22,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:22,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:01:22,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:01:22,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:22" (1/1) ... [2023-08-30 06:01:22,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dffbcb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:22, skipping insertion in model container [2023-08-30 06:01:22,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:22" (1/1) ... [2023-08-30 06:01:22,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:01:22,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:01:22,526 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-30 06:01:22,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:22,541 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 06:01:22,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c15d527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:22, skipping insertion in model container [2023-08-30 06:01:22,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:22,543 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:01:22,544 INFO L158 Benchmark]: Toolchain (without parser) took 243.74ms. Allocated memory is still 73.4MB. Free memory was 46.5MB in the beginning and 36.2MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:01:22,544 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:01:22,545 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.47ms. Allocated memory is still 73.4MB. Free memory was 46.5MB in the beginning and 36.2MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:01:22,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.47ms. Allocated memory is still 73.4MB. Free memory was 46.5MB in the beginning and 36.2MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --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 06:01:23,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:01:23,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:01:23,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:01:23,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:01:23,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:01:23,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:01:23,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:01:23,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:01:23,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:01:23,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:01:23,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:01:23,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:01:23,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:01:23,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:01:23,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:01:23,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:01:23,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:01:23,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:01:23,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:01:23,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:01:23,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:01:23,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:01:23,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:01:23,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:01:23,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:01:23,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:01:23,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:01:23,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:01:23,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:01:23,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:01:23,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:01:23,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:01:23,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:01:23,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:01:23,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:01:23,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:01:23,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:01:23,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:01:23,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:01:23,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:01:23,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:01:23,988 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:01:23,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:01:23,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:01:23,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:01:23,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:01:23,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:01:23,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:01:23,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:01:23,990 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:01:23,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:01:23,990 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:01:23,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:01:23,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:01:23,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:01:23,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:01:23,991 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:01:23,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:01:23,991 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:01:23,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:01:23,991 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:01:23,991 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:01:23,991 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:01:23,992 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:01:23,992 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:01:23,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:01:23,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:01:23,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:01:23,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:01:23,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:01:23,993 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:01:23,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:01:24,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:01:24,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:01:24,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:01:24,204 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:01:24,204 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:01:24,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-30 06:01:25,161 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:01:25,355 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:01:25,356 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-08-30 06:01:25,361 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9f70e9d7/45a17c0abb7048b6965a7c03e642281e/FLAGd5b8157cd [2023-08-30 06:01:25,371 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9f70e9d7/45a17c0abb7048b6965a7c03e642281e [2023-08-30 06:01:25,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:01:25,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:01:25,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:25,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:01:25,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:01:25,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@107c7867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25, skipping insertion in model container [2023-08-30 06:01:25,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:01:25,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:01:25,585 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-30 06:01:25,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:25,610 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:01:25,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:01:25,648 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-30 06:01:25,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:25,663 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:01:25,698 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2023-08-30 06:01:25,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:01:25,712 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:01:25,712 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:01:25,716 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:01:25,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25 WrapperNode [2023-08-30 06:01:25,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:01:25,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:01:25,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:01:25,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:01:25,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,782 INFO L138 Inliner]: procedures = 28, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 313 [2023-08-30 06:01:25,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:01:25,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:01:25,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:01:25,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:01:25,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,822 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:01:25,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:01:25,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:01:25,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:01:25,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (1/1) ... [2023-08-30 06:01:25,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:01:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:01:25,852 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 06:01:25,857 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 06:01:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:01:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:01:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:01:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:01:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:01:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:01:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:01:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:01:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:01:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:01:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:01:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:01:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:01:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:01:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:01:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:01:25,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:01:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:01:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:01:25,878 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 06:01:25,963 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:01:25,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:01:26,567 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:01:26,736 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:01:26,737 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 06:01:26,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:26 BoogieIcfgContainer [2023-08-30 06:01:26,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:01:26,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:01:26,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:01:26,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:01:26,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:01:25" (1/3) ... [2023-08-30 06:01:26,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fd6dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:26, skipping insertion in model container [2023-08-30 06:01:26,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:01:25" (2/3) ... [2023-08-30 06:01:26,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fd6dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:01:26, skipping insertion in model container [2023-08-30 06:01:26,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:01:26" (3/3) ... [2023-08-30 06:01:26,746 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-08-30 06:01:26,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:01:26,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 06:01:26,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:01:26,833 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:01:26,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 258 transitions, 548 flow [2023-08-30 06:01:26,948 INFO L130 PetriNetUnfolder]: 19/254 cut-off events. [2023-08-30 06:01:26,948 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:01:26,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 254 events. 19/254 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 219 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2023-08-30 06:01:26,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 258 transitions, 548 flow [2023-08-30 06:01:26,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 250 transitions, 524 flow [2023-08-30 06:01:26,964 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:01:26,973 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 250 transitions, 524 flow [2023-08-30 06:01:26,976 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 250 transitions, 524 flow [2023-08-30 06:01:26,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 250 transitions, 524 flow [2023-08-30 06:01:27,022 INFO L130 PetriNetUnfolder]: 19/250 cut-off events. [2023-08-30 06:01:27,022 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:01:27,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 250 events. 19/250 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 218 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2023-08-30 06:01:27,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-30 06:01:52,860 INFO L134 LiptonReduction]: Checked pairs total: 5485 [2023-08-30 06:01:52,860 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-30 06:01:52,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:01:52,878 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;@5420b0c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:01:52,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-30 06:01:52,885 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:01:52,886 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:01:52,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:01:52,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:01:52,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:01:52,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:01:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 38083, now seen corresponding path program 1 times [2023-08-30 06:01:52,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:01:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519305894] [2023-08-30 06:01:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:01:52,902 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 06:01:52,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:01:52,904 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 06:01:52,909 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 06:01:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:01:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:01:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:01:53,249 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:01:53,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:01:53,293 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 06:01:53,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:01:53,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:01:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519305894] [2023-08-30 06:01:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519305894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:01:53,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:01:53,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:01:53,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203413234] [2023-08-30 06:01:53,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:01:53,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:01:53,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:01:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:01:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:01:53,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 522 [2023-08-30 06:01:53,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:53,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:01:53,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 522 [2023-08-30 06:01:53,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:01:57,017 INFO L130 PetriNetUnfolder]: 31228/39023 cut-off events. [2023-08-30 06:01:57,017 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-08-30 06:01:57,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78387 conditions, 39023 events. 31228/39023 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 207777 event pairs, 20215 based on Foata normal form. 0/10691 useless extension candidates. Maximal degree in co-relation 34221. Up to 19215 conditions per place. [2023-08-30 06:01:57,252 INFO L137 encePairwiseOnDemand]: 515/522 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-08-30 06:01:57,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 504 flow [2023-08-30 06:01:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:01:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:01:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-30 06:01:57,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47956577266922096 [2023-08-30 06:01:57,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-30 06:01:57,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-30 06:01:57,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:01:57,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-30 06:01:57,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,276 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 152 flow. Second operand 3 states and 751 transitions. [2023-08-30 06:01:57,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 504 flow [2023-08-30 06:01:57,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 117 transitions, 472 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:01:57,304 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 166 flow [2023-08-30 06:01:57,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-08-30 06:01:57,307 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-08-30 06:01:57,307 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 166 flow [2023-08-30 06:01:57,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:01:57,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:01:57,320 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 06:01:57,520 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 06:01:57,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:01:57,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:01:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 38082, now seen corresponding path program 1 times [2023-08-30 06:01:57,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:01:57,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557302731] [2023-08-30 06:01:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:01:57,522 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 06:01:57,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:01:57,524 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 06:01:57,526 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 06:01:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:01:57,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:01:57,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:01:57,690 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:01:57,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:01:57,712 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 06:01:57,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:01:57,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:01:57,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557302731] [2023-08-30 06:01:57,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557302731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:01:57,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:01:57,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:01:57,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477514824] [2023-08-30 06:01:57,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:01:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:01:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:01:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:01:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:01:57,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 522 [2023-08-30 06:01:57,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:57,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:01:57,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 522 [2023-08-30 06:01:57,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:00,561 INFO L130 PetriNetUnfolder]: 31233/39019 cut-off events. [2023-08-30 06:02:00,561 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:02:00,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77777 conditions, 39019 events. 31233/39019 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 208324 event pairs, 20218 based on Foata normal form. 2/10239 useless extension candidates. Maximal degree in co-relation 38877. Up to 38429 conditions per place. [2023-08-30 06:02:01,037 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 57 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-30 06:02:01,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 278 flow [2023-08-30 06:02:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-08-30 06:02:01,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425287356321839 [2023-08-30 06:02:01,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-08-30 06:02:01,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-08-30 06:02:01,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:01,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-08-30 06:02:01,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:01,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:01,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:01,044 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 166 flow. Second operand 3 states and 693 transitions. [2023-08-30 06:02:01,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 278 flow [2023-08-30 06:02:01,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:02:01,048 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 156 flow [2023-08-30 06:02:01,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-30 06:02:01,049 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-30 06:02:01,050 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 156 flow [2023-08-30 06:02:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:01,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:01,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:02:01,077 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 06:02:01,262 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 06:02:01,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:01,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1184525, now seen corresponding path program 1 times [2023-08-30 06:02:01,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:01,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486513580] [2023-08-30 06:02:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:01,266 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 06:02:01,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:01,267 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 06:02:01,269 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 06:02:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:02:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:01,463 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:02:01,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:02:01,518 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 06:02:01,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:02:01,660 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 06:02:01,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486513580] [2023-08-30 06:02:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486513580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:02:01,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:02:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:02:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032260662] [2023-08-30 06:02:01,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:02:01,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:02:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:02:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:02:02,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 522 [2023-08-30 06:02:02,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:02,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:02,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 522 [2023-08-30 06:02:02,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:07,591 INFO L130 PetriNetUnfolder]: 46847/58539 cut-off events. [2023-08-30 06:02:07,591 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:02:07,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116662 conditions, 58539 events. 46847/58539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3684. Compared 321685 event pairs, 30321 based on Foata normal form. 0/16274 useless extension candidates. Maximal degree in co-relation 116654. Up to 19216 conditions per place. [2023-08-30 06:02:07,888 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 152 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2023-08-30 06:02:07,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 177 transitions, 758 flow [2023-08-30 06:02:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:02:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:02:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1389 transitions. [2023-08-30 06:02:07,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434865900383142 [2023-08-30 06:02:07,893 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1389 transitions. [2023-08-30 06:02:07,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1389 transitions. [2023-08-30 06:02:07,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:07,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1389 transitions. [2023-08-30 06:02:07,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.5) internal successors, (1389), 6 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:07,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 522.0) internal successors, (3654), 7 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:07,901 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 522.0) internal successors, (3654), 7 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:07,902 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 156 flow. Second operand 6 states and 1389 transitions. [2023-08-30 06:02:07,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 177 transitions, 758 flow [2023-08-30 06:02:07,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 177 transitions, 757 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:07,905 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 300 flow [2023-08-30 06:02:07,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-30 06:02:07,905 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2023-08-30 06:02:07,906 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 300 flow [2023-08-30 06:02:07,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:07,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:07,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:02:07,914 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 06:02:08,113 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 06:02:08,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:08,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1185598, now seen corresponding path program 1 times [2023-08-30 06:02:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540518981] [2023-08-30 06:02:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:08,114 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 06:02:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:08,115 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 06:02:08,116 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 06:02:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:02:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:08,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:08,331 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 06:02:08,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 06:02:08,721 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 06:02:08,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:02:08,766 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 06:02:08,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:08,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:08,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540518981] [2023-08-30 06:02:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540518981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:02:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296614545] [2023-08-30 06:02:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:02:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:02:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:02:08,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-08-30 06:02:08,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:08,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:08,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-08-30 06:02:08,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:12,887 INFO L130 PetriNetUnfolder]: 37855/47659 cut-off events. [2023-08-30 06:02:12,887 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 06:02:12,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94979 conditions, 47659 events. 37855/47659 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 264540 event pairs, 24327 based on Foata normal form. 0/13489 useless extension candidates. Maximal degree in co-relation 94966. Up to 46774 conditions per place. [2023-08-30 06:02:13,148 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 68 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-30 06:02:13,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 418 flow [2023-08-30 06:02:13,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-30 06:02:13,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44699872286079184 [2023-08-30 06:02:13,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-30 06:02:13,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-30 06:02:13,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:13,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-30 06:02:13,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:13,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:13,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:13,157 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 300 flow. Second operand 3 states and 700 transitions. [2023-08-30 06:02:13,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 418 flow [2023-08-30 06:02:13,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 399 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:13,162 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 263 flow [2023-08-30 06:02:13,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-30 06:02:13,163 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-30 06:02:13,163 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 263 flow [2023-08-30 06:02:13,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:13,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:13,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:02:13,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 06:02:13,375 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 06:02:13,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:13,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1185597, now seen corresponding path program 1 times [2023-08-30 06:02:13,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:13,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187796149] [2023-08-30 06:02:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:13,377 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 06:02:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:13,378 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 06:02:13,381 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 06:02:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:13,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:02:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,616 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 06:02:13,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-30 06:02:13,647 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 06:02:13,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 06:02:13,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:13,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:02:13,706 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 06:02:13,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:13,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187796149] [2023-08-30 06:02:13,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187796149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:13,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:13,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:02:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20373917] [2023-08-30 06:02:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:13,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:02:13,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:13,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:02:13,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:02:13,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-08-30 06:02:13,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:13,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:13,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-08-30 06:02:13,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:16,272 INFO L130 PetriNetUnfolder]: 28853/36779 cut-off events. [2023-08-30 06:02:16,272 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:02:16,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73200 conditions, 36779 events. 28853/36779 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2154. Compared 204744 event pairs, 18327 based on Foata normal form. 0/11614 useless extension candidates. Maximal degree in co-relation 73186. Up to 35894 conditions per place. [2023-08-30 06:02:16,464 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 06:02:16,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 373 flow [2023-08-30 06:02:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2023-08-30 06:02:16,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495530012771392 [2023-08-30 06:02:16,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2023-08-30 06:02:16,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2023-08-30 06:02:16,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:16,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2023-08-30 06:02:16,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:16,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:16,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:16,474 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 263 flow. Second operand 3 states and 704 transitions. [2023-08-30 06:02:16,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 373 flow [2023-08-30 06:02:16,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:16,475 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 244 flow [2023-08-30 06:02:16,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-30 06:02:16,477 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-08-30 06:02:16,478 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 244 flow [2023-08-30 06:02:16,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:16,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:16,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:02:16,488 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 06:02:16,687 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 06:02:16,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:16,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1139386454, now seen corresponding path program 1 times [2023-08-30 06:02:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:16,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061774487] [2023-08-30 06:02:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:16,689 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 06:02:16,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:16,690 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 06:02:16,691 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 06:02:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:02:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:16,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:16,853 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 06:02:16,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 06:02:17,120 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:02:17,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:02:17,238 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 06:02:17,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:17,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:17,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061774487] [2023-08-30 06:02:17,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061774487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:17,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:17,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:02:17,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353807005] [2023-08-30 06:02:17,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:17,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:02:17,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:17,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:02:17,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:02:17,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-08-30 06:02:17,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:17,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:17,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-08-30 06:02:17,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:19,975 INFO L130 PetriNetUnfolder]: 27632/35168 cut-off events. [2023-08-30 06:02:19,978 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:02:20,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69979 conditions, 35168 events. 27632/35168 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 193778 event pairs, 17418 based on Foata normal form. 0/11311 useless extension candidates. Maximal degree in co-relation 69964. Up to 34283 conditions per place. [2023-08-30 06:02:20,156 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-30 06:02:20,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 366 flow [2023-08-30 06:02:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-08-30 06:02:20,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 06:02:20,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-08-30 06:02:20,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-08-30 06:02:20,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:20,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-08-30 06:02:20,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:20,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:20,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:20,163 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 244 flow. Second operand 3 states and 696 transitions. [2023-08-30 06:02:20,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 366 flow [2023-08-30 06:02:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:20,164 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 241 flow [2023-08-30 06:02:20,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-30 06:02:20,165 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-30 06:02:20,165 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 241 flow [2023-08-30 06:02:20,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:20,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:20,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:02:20,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-30 06:02:20,372 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 06:02:20,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:20,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1139386455, now seen corresponding path program 1 times [2023-08-30 06:02:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:20,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019820817] [2023-08-30 06:02:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:20,374 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 06:02:20,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:20,375 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 06:02:20,376 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 06:02:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:02:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:20,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:20,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:20,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:20,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:20,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:20,564 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 06:02:20,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 06:02:20,587 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:02:20,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 06:02:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:02:20,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:02:20,661 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 06:02:20,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:20,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019820817] [2023-08-30 06:02:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019820817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:20,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:20,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:02:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836928255] [2023-08-30 06:02:20,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:02:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:02:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:02:20,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-08-30 06:02:20,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:20,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:20,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-08-30 06:02:20,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:23,051 INFO L130 PetriNetUnfolder]: 26411/33557 cut-off events. [2023-08-30 06:02:23,051 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:02:23,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66758 conditions, 33557 events. 26411/33557 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 183481 event pairs, 16509 based on Foata normal form. 0/11008 useless extension candidates. Maximal degree in co-relation 66742. Up to 32672 conditions per place. [2023-08-30 06:02:23,225 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 06:02:23,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 359 flow [2023-08-30 06:02:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-30 06:02:23,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44699872286079184 [2023-08-30 06:02:23,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-30 06:02:23,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-30 06:02:23,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:23,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-30 06:02:23,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:23,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:23,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:23,234 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 241 flow. Second operand 3 states and 700 transitions. [2023-08-30 06:02:23,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 359 flow [2023-08-30 06:02:23,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:23,236 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2023-08-30 06:02:23,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-30 06:02:23,237 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-30 06:02:23,238 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2023-08-30 06:02:23,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:23,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:23,238 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:02:23,252 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 (8)] Ended with exit code 0 [2023-08-30 06:02:23,452 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 06:02:23,453 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:23,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash 932370243, now seen corresponding path program 2 times [2023-08-30 06:02:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257714836] [2023-08-30 06:02:23,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:02:23,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:02:23,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:23,457 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 06:02:23,458 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 06:02:23,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:02:23,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:02:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:02:23,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:23,691 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:02:23,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:02:23,800 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 06:02:23,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:02:24,258 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 06:02:24,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257714836] [2023-08-30 06:02:24,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257714836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:02:24,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:02:24,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:02:24,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951607704] [2023-08-30 06:02:24,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:02:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:02:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:24,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:02:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:02:28,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 522 [2023-08-30 06:02:28,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:28,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:28,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 522 [2023-08-30 06:02:28,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:31,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:32,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:33,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:36,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:37,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:39,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:02:50,799 INFO L130 PetriNetUnfolder]: 87978/111827 cut-off events. [2023-08-30 06:02:50,799 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 06:02:51,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222275 conditions, 111827 events. 87978/111827 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 4455. Compared 666746 event pairs, 55003 based on Foata normal form. 12/38526 useless extension candidates. Maximal degree in co-relation 222258. Up to 10896 conditions per place. [2023-08-30 06:02:51,455 INFO L137 encePairwiseOnDemand]: 515/522 looper letters, 415 selfloop transitions, 32 changer transitions 0/453 dead transitions. [2023-08-30 06:02:51,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 453 transitions, 2080 flow [2023-08-30 06:02:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:02:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:02:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2907 transitions. [2023-08-30 06:02:51,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640804597701149 [2023-08-30 06:02:51,462 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2907 transitions. [2023-08-30 06:02:51,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2907 transitions. [2023-08-30 06:02:51,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:51,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2907 transitions. [2023-08-30 06:02:51,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 242.25) internal successors, (2907), 12 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:51,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 522.0) internal successors, (6786), 13 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:51,474 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 522.0) internal successors, (6786), 13 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:51,474 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 12 states and 2907 transitions. [2023-08-30 06:02:51,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 453 transitions, 2080 flow [2023-08-30 06:02:51,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 453 transitions, 2079 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:51,479 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 481 flow [2023-08-30 06:02:51,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=481, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-08-30 06:02:51,479 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-08-30 06:02:51,479 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 481 flow [2023-08-30 06:02:51,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:51,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:51,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:02:51,488 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 06:02:51,687 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 06:02:51,687 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:02:51,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash 961234650, now seen corresponding path program 1 times [2023-08-30 06:02:51,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:02:51,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666724289] [2023-08-30 06:02:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:51,689 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 06:02:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:02:51,689 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 06:02:51,691 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 06:02:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:51,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:02:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:02:51,800 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 06:02:51,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:02:51,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:02:51,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666724289] [2023-08-30 06:02:51,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666724289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:51,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:51,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:02:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121033816] [2023-08-30 06:02:51,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:51,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:02:51,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:02:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:02:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:02:51,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 522 [2023-08-30 06:02:51,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:51,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:51,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 522 [2023-08-30 06:02:51,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:03:01,619 INFO L130 PetriNetUnfolder]: 100374/129400 cut-off events. [2023-08-30 06:03:01,619 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 06:03:02,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257388 conditions, 129400 events. 100374/129400 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 5120. Compared 816741 event pairs, 63900 based on Foata normal form. 0/47789 useless extension candidates. Maximal degree in co-relation 257363. Up to 108766 conditions per place. [2023-08-30 06:03:02,705 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 127 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-08-30 06:03:02,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 970 flow [2023-08-30 06:03:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:03:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:03:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 948 transitions. [2023-08-30 06:03:02,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540229885057471 [2023-08-30 06:03:02,708 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 948 transitions. [2023-08-30 06:03:02,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 948 transitions. [2023-08-30 06:03:02,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:03:02,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 948 transitions. [2023-08-30 06:03:02,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:02,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 522.0) internal successors, (2610), 5 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:02,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 522.0) internal successors, (2610), 5 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:02,713 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 481 flow. Second operand 4 states and 948 transitions. [2023-08-30 06:03:02,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 970 flow [2023-08-30 06:03:02,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 887 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 06:03:02,717 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 441 flow [2023-08-30 06:03:02,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-08-30 06:03:02,721 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-08-30 06:03:02,721 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 441 flow [2023-08-30 06:03:02,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:02,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:03:02,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:03:02,730 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 06:03:02,929 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 06:03:02,929 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:03:02,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:03:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1132425180, now seen corresponding path program 1 times [2023-08-30 06:03:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:03:02,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084743842] [2023-08-30 06:03:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:03:02,931 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 06:03:02,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:03:02,931 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 06:03:02,937 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 06:03:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:03:03,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:03:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:03:03,172 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:03:03,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:03:03,304 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:03:03,306 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:03:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:03:03,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:03:03,421 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:03:03,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:03:03,462 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 06:03:03,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:03:04,710 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 06:03:04,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:03:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084743842] [2023-08-30 06:03:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084743842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:03:04,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:03:04,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:03:04,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035413920] [2023-08-30 06:03:04,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:03:04,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:03:04,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:03:04,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:03:04,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:03:14,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 522 [2023-08-30 06:03:14,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:14,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:03:14,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 522 [2023-08-30 06:03:14,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:03:20,040 WARN L222 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:03:21,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:04:02,969 INFO L130 PetriNetUnfolder]: 213466/274752 cut-off events. [2023-08-30 06:04:02,969 INFO L131 PetriNetUnfolder]: For 30090/30090 co-relation queries the response was YES. [2023-08-30 06:04:04,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619046 conditions, 274752 events. 213466/274752 cut-off events. For 30090/30090 co-relation queries the response was YES. Maximal size of possible extension queue 10431. Compared 1850372 event pairs, 134750 based on Foata normal form. 0/134680 useless extension candidates. Maximal degree in co-relation 619019. Up to 108731 conditions per place. [2023-08-30 06:04:05,272 INFO L137 encePairwiseOnDemand]: 513/522 looper letters, 235 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2023-08-30 06:04:05,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 272 transitions, 1619 flow [2023-08-30 06:04:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:04:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:04:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3103 transitions. [2023-08-30 06:04:05,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962962962962963 [2023-08-30 06:04:05,280 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3103 transitions. [2023-08-30 06:04:05,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3103 transitions. [2023-08-30 06:04:05,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:04:05,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3103 transitions. [2023-08-30 06:04:05,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 206.86666666666667) internal successors, (3103), 15 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:05,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 522.0) internal successors, (8352), 16 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:05,303 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 522.0) internal successors, (8352), 16 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:05,303 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 441 flow. Second operand 15 states and 3103 transitions. [2023-08-30 06:04:05,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 272 transitions, 1619 flow [2023-08-30 06:04:05,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 272 transitions, 1613 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:04:05,319 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 689 flow [2023-08-30 06:04:05,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=689, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-08-30 06:04:05,321 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2023-08-30 06:04:05,321 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 689 flow [2023-08-30 06:04:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:05,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:04:05,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:04:05,336 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 06:04:05,530 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 06:04:05,531 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:04:05,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:04:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -266250333, now seen corresponding path program 1 times [2023-08-30 06:04:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:04:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746841994] [2023-08-30 06:04:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:04:05,532 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 06:04:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:04:05,533 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 06:04:05,534 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 06:04:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:04:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:04:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:04:05,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:05,788 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-08-30 06:04:05,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2023-08-30 06:04:05,882 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:04:05,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:04:05,954 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 06:04:05,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:04:05,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:04:05,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746841994] [2023-08-30 06:04:05,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746841994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:04:05,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:04:05,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:04:05,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576273848] [2023-08-30 06:04:05,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:04:05,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:04:05,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:04:05,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:04:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:04:06,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 522 [2023-08-30 06:04:06,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 689 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:06,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:04:06,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 522 [2023-08-30 06:04:06,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:04:29,736 INFO L130 PetriNetUnfolder]: 210246/269886 cut-off events. [2023-08-30 06:04:29,736 INFO L131 PetriNetUnfolder]: For 142061/142061 co-relation queries the response was YES. [2023-08-30 06:04:31,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643099 conditions, 269886 events. 210246/269886 cut-off events. For 142061/142061 co-relation queries the response was YES. Maximal size of possible extension queue 10369. Compared 1818587 event pairs, 132630 based on Foata normal form. 0/137256 useless extension candidates. Maximal degree in co-relation 643065. Up to 262506 conditions per place. [2023-08-30 06:04:32,565 INFO L137 encePairwiseOnDemand]: 519/522 looper letters, 95 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-30 06:04:32,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 102 transitions, 877 flow [2023-08-30 06:04:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:04:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:04:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-30 06:04:32,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189016602809705 [2023-08-30 06:04:32,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-30 06:04:32,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-30 06:04:32,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:04:32,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-30 06:04:32,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:32,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:32,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:32,571 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 689 flow. Second operand 3 states and 692 transitions. [2023-08-30 06:04:32,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 102 transitions, 877 flow [2023-08-30 06:04:32,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 102 transitions, 856 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:04:32,678 INFO L231 Difference]: Finished difference. Result has 103 places, 102 transitions, 666 flow [2023-08-30 06:04:32,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=522, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2023-08-30 06:04:32,678 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-08-30 06:04:32,678 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 666 flow [2023-08-30 06:04:32,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:32,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:04:32,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:04:32,687 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 (12)] Ended with exit code 0 [2023-08-30 06:04:32,885 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 06:04:32,885 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:04:32,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:04:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash -266250332, now seen corresponding path program 1 times [2023-08-30 06:04:32,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:04:32,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313876322] [2023-08-30 06:04:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:04:32,887 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 06:04:32,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:04:32,907 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 06:04:32,909 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 06:04:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:04:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:04:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:04:33,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:33,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:33,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:33,212 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 06:04:33,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-30 06:04:33,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 06:04:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:04:33,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:04:33,402 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 06:04:33,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:04:33,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:04:33,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313876322] [2023-08-30 06:04:33,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313876322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:04:33,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:04:33,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:04:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106579104] [2023-08-30 06:04:33,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:04:33,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:04:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:04:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:04:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:04:33,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 522 [2023-08-30 06:04:33,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 102 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:33,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:04:33,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 522 [2023-08-30 06:04:33,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand