./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.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-counter-fun.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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --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 06:19:19,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:19:19,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:19:19,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:19:19,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:19:19,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:19:19,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:19:19,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:19:19,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:19:19,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:19:19,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:19:19,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:19:19,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:19:19,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:19:19,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:19:19,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:19:19,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:19:19,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:19:19,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:19:19,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:19:19,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:19:19,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:19:19,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:19:19,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:19:19,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:19:19,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:19:19,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:19:19,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:19:19,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:19:19,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:19:19,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:19:19,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:19:19,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:19:19,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:19:19,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:19:19,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:19:19,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:19:19,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:19:19,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:19:19,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:19:19,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:19:19,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:19:19,425 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:19:19,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:19:19,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:19:19,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:19:19,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:19:19,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:19:19,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:19:19,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:19:19,431 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:19:19,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:19:19,432 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:19:19,432 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:19:19,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:19:19,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:19:19,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:19:19,432 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:19:19,433 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:19:19,433 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:19:19,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:19:19,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:19:19,433 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:19:19,433 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:19:19,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:19:19,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:19:19,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:19:19,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:19:19,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:19:19,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:19:19,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:19:19,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:19:19,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:19:19,435 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:19:19,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:19:19,435 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:19:19,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:19:19,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:19:19,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:19:19,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:19:19,717 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:19:19,718 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:19:19,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-30 06:19:20,615 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:19:20,778 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:19:20,778 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-30 06:19:20,783 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f1556fad/8fcec5fd689e4b86a4ea97a5592d5ac4/FLAGbd6377874 [2023-08-30 06:19:20,799 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f1556fad/8fcec5fd689e4b86a4ea97a5592d5ac4 [2023-08-30 06:19:20,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:19:20,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:19:20,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:19:20,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:19:20,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:19:20,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:19:20" (1/1) ... [2023-08-30 06:19:20,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370fde1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:20, skipping insertion in model container [2023-08-30 06:19:20,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:19:20" (1/1) ... [2023-08-30 06:19:20,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:19:20,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:19:20,934 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-counter-fun.wvr.c[2681,2694] [2023-08-30 06:19:20,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:19:20,947 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 06:19:20,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7060230a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:20, skipping insertion in model container [2023-08-30 06:19:20,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:19:20,948 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:19:20,949 INFO L158 Benchmark]: Toolchain (without parser) took 146.66ms. Allocated memory is still 100.7MB. Free memory was 77.0MB in the beginning and 67.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:19:20,950 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 65.0MB. Free memory was 42.6MB in the beginning and 42.5MB in the end (delta: 74.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:19:20,950 INFO L158 Benchmark]: CACSL2BoogieTranslator took 145.27ms. Allocated memory is still 100.7MB. Free memory was 77.0MB in the beginning and 67.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:19:20,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 65.0MB. Free memory was 42.6MB in the beginning and 42.5MB in the end (delta: 74.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 145.27ms. Allocated memory is still 100.7MB. Free memory was 77.0MB in the beginning and 67.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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-counter-fun.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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --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 06:19:22,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:19:22,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:19:22,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:19:22,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:19:22,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:19:22,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:19:22,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:19:22,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:19:22,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:19:22,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:19:22,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:19:22,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:19:22,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:19:22,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:19:22,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:19:22,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:19:22,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:19:22,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:19:22,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:19:22,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:19:22,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:19:22,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:19:22,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:19:22,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:19:22,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:19:22,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:19:22,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:19:22,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:19:22,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:19:22,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:19:22,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:19:22,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:19:22,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:19:22,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:19:22,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:19:22,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:19:22,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:19:22,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:19:22,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:19:22,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:19:22,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:19:22,446 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:19:22,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:19:22,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:19:22,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:19:22,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:19:22,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:19:22,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:19:22,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:19:22,449 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:19:22,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:19:22,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:19:22,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:19:22,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:19:22,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:19:22,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:19:22,452 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:19:22,452 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:19:22,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:19:22,452 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:19:22,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:19:22,453 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:19:22,453 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:19:22,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:19:22,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:19:22,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:19:22,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:19:22,691 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:19:22,692 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:19:22,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-30 06:19:23,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:19:23,807 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:19:23,807 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-30 06:19:23,811 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d787dfbe/033b3d6f28574eddab75ed0f27945a9d/FLAG60d562786 [2023-08-30 06:19:23,821 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d787dfbe/033b3d6f28574eddab75ed0f27945a9d [2023-08-30 06:19:23,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:19:23,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:19:23,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:19:23,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:19:23,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:19:23,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:19:23" (1/1) ... [2023-08-30 06:19:23,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3c02a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:23, skipping insertion in model container [2023-08-30 06:19:23,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:19:23" (1/1) ... [2023-08-30 06:19:23,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:19:23,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:19:23,967 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-counter-fun.wvr.c[2681,2694] [2023-08-30 06:19:23,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:19:23,988 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:19:23,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:19:24,008 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-counter-fun.wvr.c[2681,2694] [2023-08-30 06:19:24,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:19:24,017 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:19:24,029 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-counter-fun.wvr.c[2681,2694] [2023-08-30 06:19:24,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:19:24,042 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:19:24,042 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:19:24,048 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:19:24,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24 WrapperNode [2023-08-30 06:19:24,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:19:24,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:19:24,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:19:24,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:19:24,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,096 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2023-08-30 06:19:24,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:19:24,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:19:24,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:19:24,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:19:24,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:19:24,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:19:24,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:19:24,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:19:24,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (1/1) ... [2023-08-30 06:19:24,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:19:24,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:19:24,182 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 06:19:24,201 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 06:19:24,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:19:24,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:19:24,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:19:24,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:19:24,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:19:24,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:19:24,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:19:24,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:19:24,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:19:24,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:19:24,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:19:24,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:19:24,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:19:24,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:19:24,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:19:24,216 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 06:19:24,285 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:19:24,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:19:24,717 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:19:24,955 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:19:24,955 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:19:24,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:19:24 BoogieIcfgContainer [2023-08-30 06:19:24,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:19:24,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:19:24,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:19:24,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:19:24,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:19:23" (1/3) ... [2023-08-30 06:19:24,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e01de7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:19:24, skipping insertion in model container [2023-08-30 06:19:24,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:19:24" (2/3) ... [2023-08-30 06:19:24,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e01de7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:19:24, skipping insertion in model container [2023-08-30 06:19:24,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:19:24" (3/3) ... [2023-08-30 06:19:24,963 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-08-30 06:19:24,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:19:24,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-30 06:19:24,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:19:25,064 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 06:19:25,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 186 transitions, 388 flow [2023-08-30 06:19:25,160 INFO L130 PetriNetUnfolder]: 13/184 cut-off events. [2023-08-30 06:19:25,161 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:19:25,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 13/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 266 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-08-30 06:19:25,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 186 transitions, 388 flow [2023-08-30 06:19:25,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 180 transitions, 372 flow [2023-08-30 06:19:25,171 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:19:25,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 180 transitions, 372 flow [2023-08-30 06:19:25,184 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 180 transitions, 372 flow [2023-08-30 06:19:25,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 180 transitions, 372 flow [2023-08-30 06:19:25,226 INFO L130 PetriNetUnfolder]: 13/180 cut-off events. [2023-08-30 06:19:25,226 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:19:25,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 180 events. 13/180 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 270 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-08-30 06:19:25,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-08-30 06:19:42,390 INFO L134 LiptonReduction]: Checked pairs total: 2314 [2023-08-30 06:19:42,391 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-30 06:19:42,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:19:42,404 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;@e72aece, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:19:42,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-08-30 06:19:42,406 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:19:42,406 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:19:42,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:42,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:19:42,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:42,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash 28743, now seen corresponding path program 1 times [2023-08-30 06:19:42,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:42,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114232437] [2023-08-30 06:19:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:42,425 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 06:19:42,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:42,428 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 06:19:42,431 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 06:19:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:19:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:42,684 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:19:42,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:19:42,708 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 06:19:42,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:19:42,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114232437] [2023-08-30 06:19:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114232437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:19:42,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:19:42,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:19:42,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668827707] [2023-08-30 06:19:42,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:19:42,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:19:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:42,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:19:42,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:19:42,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:19:42,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:42,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:42,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:19:42,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:43,292 INFO L130 PetriNetUnfolder]: 1305/1829 cut-off events. [2023-08-30 06:19:43,293 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 06:19:43,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 1829 events. 1305/1829 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 8988 event pairs, 615 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 1673. Up to 913 conditions per place. [2023-08-30 06:19:43,304 INFO L137 encePairwiseOnDemand]: 358/377 looper letters, 67 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-08-30 06:19:43,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 312 flow [2023-08-30 06:19:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:19:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:19:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-30 06:19:43,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588859416445623 [2023-08-30 06:19:43,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-30 06:19:43,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-30 06:19:43,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:43,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-30 06:19:43,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:43,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:43,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:43,350 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 116 flow. Second operand 3 states and 519 transitions. [2023-08-30 06:19:43,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 312 flow [2023-08-30 06:19:43,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 296 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:19:43,358 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 114 flow [2023-08-30 06:19:43,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-30 06:19:43,363 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 06:19:43,364 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 114 flow [2023-08-30 06:19:43,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:43,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:43,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:19:43,377 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 06:19:43,575 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 06:19:43,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:43,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 28742, now seen corresponding path program 1 times [2023-08-30 06:19:43,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185589595] [2023-08-30 06:19:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:43,577 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 06:19:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:43,580 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 06:19:43,582 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 06:19:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:19:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:43,670 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:19:43,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:19:43,681 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 06:19:43,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:19:43,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185589595] [2023-08-30 06:19:43,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185589595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:19:43,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:19:43,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:19:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118273101] [2023-08-30 06:19:43,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:19:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:19:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:43,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:19:43,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:19:43,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:19:43,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:43,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:43,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:19:43,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:44,020 INFO L130 PetriNetUnfolder]: 1319/1839 cut-off events. [2023-08-30 06:19:44,022 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:19:44,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3697 conditions, 1839 events. 1319/1839 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 9050 event pairs, 618 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1837. Up to 1825 conditions per place. [2023-08-30 06:19:44,028 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 06:19:44,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 186 flow [2023-08-30 06:19:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:19:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:19:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 06:19:44,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406719717064543 [2023-08-30 06:19:44,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 06:19:44,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 06:19:44,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:44,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 06:19:44,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:44,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:44,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:44,035 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 114 flow. Second operand 3 states and 457 transitions. [2023-08-30 06:19:44,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 186 flow [2023-08-30 06:19:44,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:19:44,037 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 104 flow [2023-08-30 06:19:44,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-08-30 06:19:44,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 06:19:44,038 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 104 flow [2023-08-30 06:19:44,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:44,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:44,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:19:44,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:19:44,246 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 06:19:44,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:44,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash 892651, now seen corresponding path program 1 times [2023-08-30 06:19:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:44,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640868717] [2023-08-30 06:19:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:44,247 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 06:19:44,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:44,249 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 06:19:44,251 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 06:19:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:44,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:19:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:44,396 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:19:44,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:19:44,451 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 06:19:44,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:19:44,645 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 06:19:44,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640868717] [2023-08-30 06:19:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640868717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:19:44,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:19:44,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:19:44,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906464118] [2023-08-30 06:19:44,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:19:44,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:19:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:19:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:19:45,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 377 [2023-08-30 06:19:45,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:45,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:45,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 377 [2023-08-30 06:19:45,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:46,525 INFO L130 PetriNetUnfolder]: 1958/2741 cut-off events. [2023-08-30 06:19:46,525 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:19:46,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 2741 events. 1958/2741 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 14067 event pairs, 921 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 5498. Up to 914 conditions per place. [2023-08-30 06:19:46,537 INFO L137 encePairwiseOnDemand]: 368/377 looper letters, 92 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2023-08-30 06:19:46,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 113 transitions, 498 flow [2023-08-30 06:19:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:19:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:19:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 897 transitions. [2023-08-30 06:19:46,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2023-08-30 06:19:46,541 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 897 transitions. [2023-08-30 06:19:46,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 897 transitions. [2023-08-30 06:19:46,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:46,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 897 transitions. [2023-08-30 06:19:46,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:46,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:46,549 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:46,549 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 104 flow. Second operand 6 states and 897 transitions. [2023-08-30 06:19:46,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 113 transitions, 498 flow [2023-08-30 06:19:46,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 113 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:19:46,552 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 248 flow [2023-08-30 06:19:46,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-08-30 06:19:46,553 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-30 06:19:46,553 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 248 flow [2023-08-30 06:19:46,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:46,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:46,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:19:46,577 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 06:19:46,764 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 06:19:46,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:46,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash 893626, now seen corresponding path program 1 times [2023-08-30 06:19:46,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:46,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693212038] [2023-08-30 06:19:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:46,767 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 06:19:46,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:46,768 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 06:19:46,770 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 06:19:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:19:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:46,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:19:46,936 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 06:19:46,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 06:19:47,001 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:19:47,001 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 06:19:47,009 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 06:19:47,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:19:47,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:47,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693212038] [2023-08-30 06:19:47,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693212038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:19:47,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:19:47,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:19:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014593726] [2023-08-30 06:19:47,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:19:47,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:19:47,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:19:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:19:47,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 377 [2023-08-30 06:19:47,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:47,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:47,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 377 [2023-08-30 06:19:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:47,483 INFO L130 PetriNetUnfolder]: 1498/2131 cut-off events. [2023-08-30 06:19:47,484 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:19:47,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 2131 events. 1498/2131 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 11004 event pairs, 693 based on Foata normal form. 0/529 useless extension candidates. Maximal degree in co-relation 4330. Up to 2110 conditions per place. [2023-08-30 06:19:47,494 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 06:19:47,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 326 flow [2023-08-30 06:19:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:19:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:19:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 06:19:47,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2023-08-30 06:19:47,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 06:19:47,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 06:19:47,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:47,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 06:19:47,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:47,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:47,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:47,500 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 248 flow. Second operand 3 states and 464 transitions. [2023-08-30 06:19:47,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 326 flow [2023-08-30 06:19:47,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 307 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:19:47,503 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 211 flow [2023-08-30 06:19:47,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2023-08-30 06:19:47,504 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-08-30 06:19:47,504 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 211 flow [2023-08-30 06:19:47,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:47,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:47,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:19:47,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:19:47,717 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 06:19:47,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:47,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash 893624, now seen corresponding path program 1 times [2023-08-30 06:19:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604853985] [2023-08-30 06:19:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:47,718 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 06:19:47,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:47,719 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 06:19:47,719 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 06:19:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:19:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:19:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:19:47,826 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:19:47,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 06:19:47,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 06:19:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:19:47,881 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 06:19:47,904 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 06:19:47,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:19:47,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:47,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604853985] [2023-08-30 06:19:47,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604853985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:19:47,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:19:47,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:19:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938448605] [2023-08-30 06:19:47,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:19:47,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:19:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:19:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:19:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 377 [2023-08-30 06:19:48,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:48,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 377 [2023-08-30 06:19:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:48,303 INFO L130 PetriNetUnfolder]: 1010/1493 cut-off events. [2023-08-30 06:19:48,304 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:19:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3048 conditions, 1493 events. 1010/1493 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 7698 event pairs, 459 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 3034. Up to 1472 conditions per place. [2023-08-30 06:19:48,309 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-30 06:19:48,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 281 flow [2023-08-30 06:19:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:19:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:19:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 06:19:48,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40848806366047746 [2023-08-30 06:19:48,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 06:19:48,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 06:19:48,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:48,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 06:19:48,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,314 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 211 flow. Second operand 3 states and 462 transitions. [2023-08-30 06:19:48,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 281 flow [2023-08-30 06:19:48,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:19:48,316 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 192 flow [2023-08-30 06:19:48,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-30 06:19:48,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2023-08-30 06:19:48,316 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 192 flow [2023-08-30 06:19:48,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:48,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:19:48,329 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 06:19:48,525 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 06:19:48,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:48,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash 858795452, now seen corresponding path program 1 times [2023-08-30 06:19:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:48,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972222450] [2023-08-30 06:19:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:48,527 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 06:19:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:48,528 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 06:19:48,530 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 06:19:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:48,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:19:48,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:48,620 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 06:19:48,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 06:19:48,639 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:19:48,640 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 06:19:48,648 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 06:19:48,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:19:48,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972222450] [2023-08-30 06:19:48,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972222450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:19:48,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:19:48,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:19:48,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129054530] [2023-08-30 06:19:48,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:19:48,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:19:48,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:48,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:19:48,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:19:48,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-08-30 06:19:48,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:48,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-08-30 06:19:48,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:48,889 INFO L130 PetriNetUnfolder]: 941/1382 cut-off events. [2023-08-30 06:19:48,889 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:19:48,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 1382 events. 941/1382 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 6927 event pairs, 426 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 2812. Up to 1361 conditions per place. [2023-08-30 06:19:48,894 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 06:19:48,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 274 flow [2023-08-30 06:19:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:19:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:19:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-30 06:19:48,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40141467727674623 [2023-08-30 06:19:48,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-30 06:19:48,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-30 06:19:48,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:48,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-30 06:19:48,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,898 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 192 flow. Second operand 3 states and 454 transitions. [2023-08-30 06:19:48,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 274 flow [2023-08-30 06:19:48,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:19:48,899 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 189 flow [2023-08-30 06:19:48,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 06:19:48,900 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 06:19:48,900 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 189 flow [2023-08-30 06:19:48,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:48,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:48,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:19:48,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:19:49,104 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 06:19:49,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:49,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash 858795453, now seen corresponding path program 1 times [2023-08-30 06:19:49,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:49,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064152447] [2023-08-30 06:19:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:49,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:19:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:49,107 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 06:19:49,109 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 06:19:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:19:49,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:49,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:19:49,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:19:49,208 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:19:49,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 06:19:49,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:19:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:19:49,244 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 06:19:49,279 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 06:19:49,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:19:49,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064152447] [2023-08-30 06:19:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064152447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:19:49,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:19:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:19:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948689409] [2023-08-30 06:19:49,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:19:49,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:19:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:19:49,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:19:49,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-08-30 06:19:49,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:49,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:49,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-08-30 06:19:49,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:49,630 INFO L130 PetriNetUnfolder]: 872/1271 cut-off events. [2023-08-30 06:19:49,630 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:19:49,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2606 conditions, 1271 events. 872/1271 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 6209 event pairs, 393 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 2590. Up to 1250 conditions per place. [2023-08-30 06:19:49,634 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 06:19:49,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 267 flow [2023-08-30 06:19:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:19:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:19:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-30 06:19:49,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39964633068081346 [2023-08-30 06:19:49,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-30 06:19:49,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-30 06:19:49,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:49,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-30 06:19:49,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:49,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:49,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:49,639 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 189 flow. Second operand 3 states and 452 transitions. [2023-08-30 06:19:49,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 267 flow [2023-08-30 06:19:49,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:19:49,640 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 186 flow [2023-08-30 06:19:49,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-30 06:19:49,641 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-08-30 06:19:49,641 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 186 flow [2023-08-30 06:19:49,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:49,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:49,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:19:49,649 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 06:19:49,848 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 06:19:49,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:49,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash 852849607, now seen corresponding path program 1 times [2023-08-30 06:19:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:49,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842366321] [2023-08-30 06:19:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:19:49,849 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 06:19:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:49,850 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 06:19:49,850 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 06:19:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:19:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:19:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:49,965 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 06:19:49,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:19:49,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842366321] [2023-08-30 06:19:49,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842366321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:19:49,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:19:49,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:19:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094239730] [2023-08-30 06:19:49,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:19:49,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:19:49,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:49,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:19:49,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:19:50,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:19:50,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:50,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:50,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:19:50,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:50,318 INFO L130 PetriNetUnfolder]: 901/1405 cut-off events. [2023-08-30 06:19:50,319 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 06:19:50,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 1405 events. 901/1405 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 7593 event pairs, 453 based on Foata normal form. 3/558 useless extension candidates. Maximal degree in co-relation 2879. Up to 1210 conditions per place. [2023-08-30 06:19:50,323 INFO L137 encePairwiseOnDemand]: 365/377 looper letters, 56 selfloop transitions, 3 changer transitions 2/63 dead transitions. [2023-08-30 06:19:50,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 392 flow [2023-08-30 06:19:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:19:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:19:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-08-30 06:19:50,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40583554376657827 [2023-08-30 06:19:50,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-08-30 06:19:50,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-08-30 06:19:50,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:19:50,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-08-30 06:19:50,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:50,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:50,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:50,328 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 186 flow. Second operand 4 states and 612 transitions. [2023-08-30 06:19:50,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 392 flow [2023-08-30 06:19:50,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:19:50,330 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2023-08-30 06:19:50,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-30 06:19:50,330 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-08-30 06:19:50,331 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2023-08-30 06:19:50,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:50,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:19:50,331 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:19:50,340 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 06:19:50,538 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 06:19:50,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:19:50,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:19:50,539 INFO L85 PathProgramCache]: Analyzing trace with hash 824768839, now seen corresponding path program 2 times [2023-08-30 06:19:50,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:19:50,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667172788] [2023-08-30 06:19:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:19:50,539 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 06:19:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:19:50,540 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 06:19:50,542 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 06:19:50,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:19:50,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:19:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:19:50,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:19:50,650 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:19:50,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:19:50,742 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 06:19:50,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:19:51,168 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 06:19:51,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:19:51,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667172788] [2023-08-30 06:19:51,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667172788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:19:51,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:19:51,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:19:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799719931] [2023-08-30 06:19:51,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:19:51,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:19:51,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:19:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:19:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:19:53,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 377 [2023-08-30 06:19:53,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 flow. Second operand has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:19:53,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:19:53,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 377 [2023-08-30 06:19:53,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:19:56,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:19:57,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:19:59,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:20:01,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:20:02,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:20:07,153 INFO L130 PetriNetUnfolder]: 3104/4760 cut-off events. [2023-08-30 06:20:07,153 INFO L131 PetriNetUnfolder]: For 359/359 co-relation queries the response was YES. [2023-08-30 06:20:07,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11982 conditions, 4760 events. 3104/4760 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29063 event pairs, 1520 based on Foata normal form. 18/2408 useless extension candidates. Maximal degree in co-relation 11963. Up to 2291 conditions per place. [2023-08-30 06:20:07,173 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 215 selfloop transitions, 32 changer transitions 0/249 dead transitions. [2023-08-30 06:20:07,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 249 transitions, 1418 flow [2023-08-30 06:20:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:20:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:20:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1843 transitions. [2023-08-30 06:20:07,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40738284703801947 [2023-08-30 06:20:07,179 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1843 transitions. [2023-08-30 06:20:07,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1843 transitions. [2023-08-30 06:20:07,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:20:07,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1843 transitions. [2023-08-30 06:20:07,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:07,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:07,186 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:07,187 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 12 states and 1843 transitions. [2023-08-30 06:20:07,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 249 transitions, 1418 flow [2023-08-30 06:20:07,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 249 transitions, 1412 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:20:07,190 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 448 flow [2023-08-30 06:20:07,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=448, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-30 06:20:07,191 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-30 06:20:07,191 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 448 flow [2023-08-30 06:20:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:07,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:20:07,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:20:07,203 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 06:20:07,398 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 06:20:07,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:20:07,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:20:07,399 INFO L85 PathProgramCache]: Analyzing trace with hash -173887378, now seen corresponding path program 1 times [2023-08-30 06:20:07,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:20:07,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928943565] [2023-08-30 06:20:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:20:07,399 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 06:20:07,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:20:07,401 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 06:20:07,402 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 06:20:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:20:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:20:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:20:07,522 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:20:07,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:20:07,540 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:20:07,540 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 06:20:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:20:07,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:20:07,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:20:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928943565] [2023-08-30 06:20:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928943565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:20:07,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:20:07,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:20:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584484778] [2023-08-30 06:20:07,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:20:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:20:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:20:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:20:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:20:07,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-08-30 06:20:07,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 448 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:07,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:20:07,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-08-30 06:20:07,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:20:08,167 INFO L130 PetriNetUnfolder]: 2324/3680 cut-off events. [2023-08-30 06:20:08,167 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-30 06:20:08,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9149 conditions, 3680 events. 2324/3680 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22391 event pairs, 1150 based on Foata normal form. 0/2059 useless extension candidates. Maximal degree in co-relation 9122. Up to 3577 conditions per place. [2023-08-30 06:20:08,178 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 46 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2023-08-30 06:20:08,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 556 flow [2023-08-30 06:20:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:20:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:20:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-30 06:20:08,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839522546419098 [2023-08-30 06:20:08,180 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-30 06:20:08,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-30 06:20:08,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:20:08,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-30 06:20:08,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,183 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 448 flow. Second operand 4 states and 579 transitions. [2023-08-30 06:20:08,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 556 flow [2023-08-30 06:20:08,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 497 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 06:20:08,186 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 405 flow [2023-08-30 06:20:08,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=405, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-08-30 06:20:08,186 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-30 06:20:08,186 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 405 flow [2023-08-30 06:20:08,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:20:08,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:20:08,194 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 06:20:08,393 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 06:20:08,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:20:08,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:20:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -173887372, now seen corresponding path program 1 times [2023-08-30 06:20:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:20:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717313904] [2023-08-30 06:20:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:20:08,394 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 06:20:08,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:20:08,396 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 06:20:08,398 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 06:20:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:20:08,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:20:08,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:20:08,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:20:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:20:08,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:20:08,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:20:08,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717313904] [2023-08-30 06:20:08,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717313904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:20:08,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:20:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:20:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133156792] [2023-08-30 06:20:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:20:08,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:20:08,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:20:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:20:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:20:08,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-08-30 06:20:08,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 405 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:20:08,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-08-30 06:20:08,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:20:08,899 INFO L130 PetriNetUnfolder]: 1604/2640 cut-off events. [2023-08-30 06:20:08,899 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2023-08-30 06:20:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6585 conditions, 2640 events. 1604/2640 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16006 event pairs, 780 based on Foata normal form. 0/1710 useless extension candidates. Maximal degree in co-relation 6557. Up to 2512 conditions per place. [2023-08-30 06:20:08,908 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 51 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-08-30 06:20:08,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 511 flow [2023-08-30 06:20:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:20:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:20:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 577 transitions. [2023-08-30 06:20:08,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826259946949602 [2023-08-30 06:20:08,910 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 577 transitions. [2023-08-30 06:20:08,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 577 transitions. [2023-08-30 06:20:08,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:20:08,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 577 transitions. [2023-08-30 06:20:08,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,915 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,915 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 405 flow. Second operand 4 states and 577 transitions. [2023-08-30 06:20:08,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 511 flow [2023-08-30 06:20:08,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 498 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:20:08,920 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 396 flow [2023-08-30 06:20:08,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=396, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-08-30 06:20:08,920 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-30 06:20:08,920 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 396 flow [2023-08-30 06:20:08,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:08,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:20:08,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:20:08,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:20:09,127 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 06:20:09,127 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:20:09,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:20:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash -173887381, now seen corresponding path program 1 times [2023-08-30 06:20:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:20:09,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776833725] [2023-08-30 06:20:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:20:09,128 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 06:20:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:20:09,130 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 06:20:09,132 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 06:20:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:20:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:20:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:20:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:20:09,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:20:09,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:20:09,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776833725] [2023-08-30 06:20:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776833725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:20:09,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:20:09,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:20:09,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885187236] [2023-08-30 06:20:09,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:20:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:20:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:20:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:20:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:20:09,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:20:09,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 396 flow. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:09,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:20:09,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:20:09,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:20:09,728 INFO L130 PetriNetUnfolder]: 1469/2455 cut-off events. [2023-08-30 06:20:09,728 INFO L131 PetriNetUnfolder]: For 426/426 co-relation queries the response was YES. [2023-08-30 06:20:09,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6136 conditions, 2455 events. 1469/2455 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14904 event pairs, 726 based on Foata normal form. 8/1650 useless extension candidates. Maximal degree in co-relation 6108. Up to 2299 conditions per place. [2023-08-30 06:20:09,734 INFO L137 encePairwiseOnDemand]: 369/377 looper letters, 55 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-08-30 06:20:09,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 570 flow [2023-08-30 06:20:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:20:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:20:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-08-30 06:20:09,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39854111405835546 [2023-08-30 06:20:09,736 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-08-30 06:20:09,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-08-30 06:20:09,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:20:09,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-08-30 06:20:09,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:09,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:09,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:09,740 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 396 flow. Second operand 4 states and 601 transitions. [2023-08-30 06:20:09,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 570 flow [2023-08-30 06:20:09,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 563 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:20:09,742 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 449 flow [2023-08-30 06:20:09,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=449, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-30 06:20:09,743 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2023-08-30 06:20:09,743 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 449 flow [2023-08-30 06:20:09,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:09,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:20:09,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:20:09,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-30 06:20:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:20:09,950 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:20:09,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:20:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -173887377, now seen corresponding path program 1 times [2023-08-30 06:20:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:20:09,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364974357] [2023-08-30 06:20:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:20:09,951 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 06:20:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:20:09,952 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:20:09,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:20:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:20:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:20:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:20:10,103 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:20:10,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:20:10,152 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:20:10,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:20:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:20:10,268 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 06:20:10,292 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:20:10,292 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 06:20:10,362 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 06:20:10,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:20:10,713 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 06:20:10,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:20:10,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364974357] [2023-08-30 06:20:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364974357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:20:10,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:20:10,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:20:10,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471037304] [2023-08-30 06:20:10,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:20:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:20:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:20:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:20:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:20:13,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 377 [2023-08-30 06:20:13,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 449 flow. Second operand has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:13,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:20:13,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 377 [2023-08-30 06:20:13,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:20:22,773 INFO L130 PetriNetUnfolder]: 3352/6004 cut-off events. [2023-08-30 06:20:22,773 INFO L131 PetriNetUnfolder]: For 2964/2964 co-relation queries the response was YES. [2023-08-30 06:20:22,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17414 conditions, 6004 events. 3352/6004 cut-off events. For 2964/2964 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 45706 event pairs, 1314 based on Foata normal form. 382/5341 useless extension candidates. Maximal degree in co-relation 17385. Up to 2635 conditions per place. [2023-08-30 06:20:22,796 INFO L137 encePairwiseOnDemand]: 365/377 looper letters, 159 selfloop transitions, 50 changer transitions 27/238 dead transitions. [2023-08-30 06:20:22,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 238 transitions, 1744 flow [2023-08-30 06:20:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 06:20:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 06:20:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2291 transitions. [2023-08-30 06:20:22,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574660633484163 [2023-08-30 06:20:22,802 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2291 transitions. [2023-08-30 06:20:22,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2291 transitions. [2023-08-30 06:20:22,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:20:22,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2291 transitions. [2023-08-30 06:20:22,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.76470588235293) internal successors, (2291), 17 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:22,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 377.0) internal successors, (6786), 18 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 06:20:22,814 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 377.0) internal successors, (6786), 18 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 06:20:22,814 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 449 flow. Second operand 17 states and 2291 transitions. [2023-08-30 06:20:22,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 238 transitions, 1744 flow [2023-08-30 06:20:22,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 238 transitions, 1689 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 06:20:22,823 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 932 flow [2023-08-30 06:20:22,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=932, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-08-30 06:20:22,824 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2023-08-30 06:20:22,824 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 932 flow [2023-08-30 06:20:22,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:22,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:20:22,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:20:22,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-30 06:20:23,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:20:23,034 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:20:23,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:20:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1088323617, now seen corresponding path program 1 times [2023-08-30 06:20:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:20:23,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009036057] [2023-08-30 06:20:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:20:23,035 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 06:20:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:20:23,037 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:20:23,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:20:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:20:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:20:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:20:23,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:20:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:20:23,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:20:23,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:20:23,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2023-08-30 06:20:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:20:23,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:20:23,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009036057] [2023-08-30 06:20:23,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009036057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:20:23,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:20:23,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 06:20:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95030084] [2023-08-30 06:20:23,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:20:23,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:20:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:20:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:20:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:20:25,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 377 [2023-08-30 06:20:25,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 932 flow. Second operand has 8 states, 8 states have (on average 127.5) internal successors, (1020), 8 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:25,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:20:25,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 377 [2023-08-30 06:20:25,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:20:29,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:31,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:33,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:35,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:36,672 INFO L130 PetriNetUnfolder]: 2951/5375 cut-off events. [2023-08-30 06:20:36,672 INFO L131 PetriNetUnfolder]: For 19612/19612 co-relation queries the response was YES. [2023-08-30 06:20:36,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19555 conditions, 5375 events. 2951/5375 cut-off events. For 19612/19612 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 41019 event pairs, 1802 based on Foata normal form. 232/5596 useless extension candidates. Maximal degree in co-relation 19512. Up to 3592 conditions per place. [2023-08-30 06:20:36,699 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 105 selfloop transitions, 45 changer transitions 0/152 dead transitions. [2023-08-30 06:20:36,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 152 transitions, 1615 flow [2023-08-30 06:20:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:20:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:20:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1334 transitions. [2023-08-30 06:20:36,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2023-08-30 06:20:36,703 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1334 transitions. [2023-08-30 06:20:36,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1334 transitions. [2023-08-30 06:20:36,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:20:36,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1334 transitions. [2023-08-30 06:20:36,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:36,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:36,709 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:36,710 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 932 flow. Second operand 10 states and 1334 transitions. [2023-08-30 06:20:36,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 152 transitions, 1615 flow [2023-08-30 06:20:36,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 152 transitions, 1593 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-08-30 06:20:36,732 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 1075 flow [2023-08-30 06:20:36,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1075, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2023-08-30 06:20:36,733 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2023-08-30 06:20:36,733 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 1075 flow [2023-08-30 06:20:36,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 127.5) internal successors, (1020), 8 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:36,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:20:36,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:20:36,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:20:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:20:36,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:20:36,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:20:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 621709420, now seen corresponding path program 1 times [2023-08-30 06:20:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:20:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2250896] [2023-08-30 06:20:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:20:36,942 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 06:20:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:20:36,943 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:20:36,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:20:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:20:37,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:20:37,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:20:37,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2023-08-30 06:20:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:20:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:20:38,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 62 [2023-08-30 06:20:38,935 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 53 treesize of output 49 [2023-08-30 06:20:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:20:40,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:20:40,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2250896] [2023-08-30 06:20:40,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2250896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:20:40,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:20:40,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:20:40,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587027683] [2023-08-30 06:20:40,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:20:40,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:20:40,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:20:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:20:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:20:45,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 377 [2023-08-30 06:20:45,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 1075 flow. Second operand has 10 states, 10 states have (on average 128.6) internal successors, (1286), 10 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:20:45,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:20:45,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 377 [2023-08-30 06:20:45,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:08,830 INFO L130 PetriNetUnfolder]: 4271/7548 cut-off events. [2023-08-30 06:21:08,830 INFO L131 PetriNetUnfolder]: For 22583/22583 co-relation queries the response was YES. [2023-08-30 06:21:08,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28678 conditions, 7548 events. 4271/7548 cut-off events. For 22583/22583 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 58850 event pairs, 839 based on Foata normal form. 463/8010 useless extension candidates. Maximal degree in co-relation 28632. Up to 3283 conditions per place. [2023-08-30 06:21:08,863 INFO L137 encePairwiseOnDemand]: 364/377 looper letters, 157 selfloop transitions, 60 changer transitions 20/239 dead transitions. [2023-08-30 06:21:08,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 239 transitions, 2279 flow [2023-08-30 06:21:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 06:21:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 06:21:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2713 transitions. [2023-08-30 06:21:08,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35981432360742704 [2023-08-30 06:21:08,869 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2713 transitions. [2023-08-30 06:21:08,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2713 transitions. [2023-08-30 06:21:08,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:08,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2713 transitions. [2023-08-30 06:21:08,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 135.65) internal successors, (2713), 20 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:08,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 377.0) internal successors, (7917), 21 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:08,879 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 377.0) internal successors, (7917), 21 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:08,879 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 1075 flow. Second operand 20 states and 2713 transitions. [2023-08-30 06:21:08,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 239 transitions, 2279 flow [2023-08-30 06:21:08,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 239 transitions, 2150 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-08-30 06:21:08,924 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 1354 flow [2023-08-30 06:21:08,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1354, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2023-08-30 06:21:08,925 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2023-08-30 06:21:08,925 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 1354 flow [2023-08-30 06:21:08,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.6) internal successors, (1286), 10 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:08,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:08,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:08,933 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 (16)] Ended with exit code 0 [2023-08-30 06:21:09,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:21:09,133 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:21:09,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2099073622, now seen corresponding path program 1 times [2023-08-30 06:21:09,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:21:09,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463002530] [2023-08-30 06:21:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:09,134 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 06:21:09,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:21:09,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:21:09,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:21:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:21:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:09,387 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:21:09,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:21:09,462 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:21:09,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:21:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:21:09,610 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 06:21:09,623 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:21:09,623 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 06:21:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:21:09,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:09,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:21:09,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2023-08-30 06:21:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:21:17,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:21:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463002530] [2023-08-30 06:21:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463002530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:17,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:21:17,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:21:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319276902] [2023-08-30 06:21:17,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:21:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:21:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:21:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:21:20,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:21:22,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 377 [2023-08-30 06:21:22,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 1354 flow. Second operand has 8 states, 8 states have (on average 124.25) internal successors, (994), 8 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:22,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:22,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 377 [2023-08-30 06:21:22,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:32,656 WARN L222 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:21:34,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:21:40,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:21:42,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:21:44,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:21:46,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:21:48,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:21:52,123 INFO L130 PetriNetUnfolder]: 4888/8704 cut-off events. [2023-08-30 06:21:52,124 INFO L131 PetriNetUnfolder]: For 59880/59880 co-relation queries the response was YES. [2023-08-30 06:21:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37756 conditions, 8704 events. 4888/8704 cut-off events. For 59880/59880 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 69179 event pairs, 2885 based on Foata normal form. 351/9051 useless extension candidates. Maximal degree in co-relation 37704. Up to 3715 conditions per place. [2023-08-30 06:21:52,165 INFO L137 encePairwiseOnDemand]: 369/377 looper letters, 140 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2023-08-30 06:21:52,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 2174 flow [2023-08-30 06:21:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:21:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:21:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1915 transitions. [2023-08-30 06:21:52,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33863837312113176 [2023-08-30 06:21:52,170 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1915 transitions. [2023-08-30 06:21:52,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1915 transitions. [2023-08-30 06:21:52,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:52,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1915 transitions. [2023-08-30 06:21:52,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 127.66666666666667) internal successors, (1915), 15 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,177 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,177 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 1354 flow. Second operand 15 states and 1915 transitions. [2023-08-30 06:21:52,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 2174 flow [2023-08-30 06:21:52,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 2130 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-30 06:21:52,255 INFO L231 Difference]: Finished difference. Result has 138 places, 114 transitions, 1409 flow [2023-08-30 06:21:52,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1409, PETRI_PLACES=138, PETRI_TRANSITIONS=114} [2023-08-30 06:21:52,256 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2023-08-30 06:21:52,256 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 114 transitions, 1409 flow [2023-08-30 06:21:52,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.25) internal successors, (994), 8 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:52,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:52,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-08-30 06:21:52,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:21:52,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:21:52,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:52,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1857182024, now seen corresponding path program 2 times [2023-08-30 06:21:52,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:21:52,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972431967] [2023-08-30 06:21:52,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:21:52,465 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 06:21:52,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:21:52,466 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:21:52,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:21:52,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:21:52,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:21:52,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:21:52,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:52,642 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:21:52,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:21:52,701 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:21:52,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:21:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:21:52,770 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 06:21:52,782 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:21:52,782 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 06:21:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 06:21:52,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:21:52,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:21:52,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972431967] [2023-08-30 06:21:52,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972431967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:52,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:52,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:21:52,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525168853] [2023-08-30 06:21:52,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:52,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:21:52,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:21:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:21:52,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:21:53,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 377 [2023-08-30 06:21:53,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 114 transitions, 1409 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:53,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:53,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 377 [2023-08-30 06:21:53,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:54,088 INFO L130 PetriNetUnfolder]: 4049/7224 cut-off events. [2023-08-30 06:21:54,088 INFO L131 PetriNetUnfolder]: For 53298/53298 co-relation queries the response was YES. [2023-08-30 06:21:54,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29097 conditions, 7224 events. 4049/7224 cut-off events. For 53298/53298 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 56389 event pairs, 2305 based on Foata normal form. 467/7531 useless extension candidates. Maximal degree in co-relation 29042. Up to 7055 conditions per place. [2023-08-30 06:21:54,124 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 98 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2023-08-30 06:21:54,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 112 transitions, 1591 flow [2023-08-30 06:21:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:21:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:21:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-08-30 06:21:54,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2023-08-30 06:21:54,126 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-08-30 06:21:54,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-08-30 06:21:54,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:54,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-08-30 06:21:54,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,128 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,128 INFO L175 Difference]: Start difference. First operand has 138 places, 114 transitions, 1409 flow. Second operand 4 states and 559 transitions. [2023-08-30 06:21:54,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 112 transitions, 1591 flow [2023-08-30 06:21:54,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1483 flow, removed 3 selfloop flow, removed 14 redundant places. [2023-08-30 06:21:54,168 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 1287 flow [2023-08-30 06:21:54,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1287, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2023-08-30 06:21:54,169 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2023-08-30 06:21:54,169 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 1287 flow [2023-08-30 06:21:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:54,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:54,178 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 (18)] Ended with exit code 0 [2023-08-30 06:21:54,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:21:54,377 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:21:54,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:54,377 INFO L85 PathProgramCache]: Analyzing trace with hash -833186888, now seen corresponding path program 1 times [2023-08-30 06:21:54,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:21:54,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45474113] [2023-08-30 06:21:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:54,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:21:54,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:21:54,379 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:21:54,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:21:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:54,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:21:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:54,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:54,888 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 35 treesize of output 31 [2023-08-30 06:21:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:55,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:21:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45474113] [2023-08-30 06:21:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45474113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:55,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:21:55,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:21:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819060089] [2023-08-30 06:21:55,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:55,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:21:55,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:21:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:21:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:21:56,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 377 [2023-08-30 06:21:56,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 1287 flow. Second operand has 12 states, 12 states have (on average 134.5) internal successors, (1614), 12 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:56,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:56,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 377 [2023-08-30 06:21:56,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:59,014 INFO L130 PetriNetUnfolder]: 3419/6282 cut-off events. [2023-08-30 06:21:59,014 INFO L131 PetriNetUnfolder]: For 22450/22450 co-relation queries the response was YES. [2023-08-30 06:21:59,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24739 conditions, 6282 events. 3419/6282 cut-off events. For 22450/22450 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 48042 event pairs, 573 based on Foata normal form. 572/6847 useless extension candidates. Maximal degree in co-relation 24690. Up to 2747 conditions per place. [2023-08-30 06:21:59,042 INFO L137 encePairwiseOnDemand]: 368/377 looper letters, 79 selfloop transitions, 78 changer transitions 19/178 dead transitions. [2023-08-30 06:21:59,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 178 transitions, 1950 flow [2023-08-30 06:21:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:21:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:21:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1705 transitions. [2023-08-30 06:21:59,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768788682581786 [2023-08-30 06:21:59,044 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1705 transitions. [2023-08-30 06:21:59,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1705 transitions. [2023-08-30 06:21:59,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:59,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1705 transitions. [2023-08-30 06:21:59,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 142.08333333333334) internal successors, (1705), 12 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:59,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:59,050 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:59,050 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 1287 flow. Second operand 12 states and 1705 transitions. [2023-08-30 06:21:59,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 178 transitions, 1950 flow [2023-08-30 06:21:59,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 178 transitions, 1873 flow, removed 32 selfloop flow, removed 2 redundant places. [2023-08-30 06:21:59,098 INFO L231 Difference]: Finished difference. Result has 140 places, 121 transitions, 1543 flow [2023-08-30 06:21:59,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1543, PETRI_PLACES=140, PETRI_TRANSITIONS=121} [2023-08-30 06:21:59,099 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2023-08-30 06:21:59,099 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 121 transitions, 1543 flow [2023-08-30 06:21:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.5) internal successors, (1614), 12 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:59,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:59,099 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:59,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:21:59,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:21:59,301 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:21:59,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash -963318421, now seen corresponding path program 2 times [2023-08-30 06:21:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:21:59,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176033488] [2023-08-30 06:21:59,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:21:59,302 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 06:21:59,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:21:59,303 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:21:59,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:21:59,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:21:59,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:21:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:21:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:59,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:21:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 06:21:59,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:21:59,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:21:59,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176033488] [2023-08-30 06:21:59,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176033488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:59,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:59,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:21:59,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047861114] [2023-08-30 06:21:59,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:59,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:21:59,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:21:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:21:59,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:21:59,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-08-30 06:21:59,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 121 transitions, 1543 flow. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:59,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:59,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-08-30 06:21:59,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:00,424 INFO L130 PetriNetUnfolder]: 2054/3833 cut-off events. [2023-08-30 06:22:00,424 INFO L131 PetriNetUnfolder]: For 30003/30003 co-relation queries the response was YES. [2023-08-30 06:22:00,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14861 conditions, 3833 events. 2054/3833 cut-off events. For 30003/30003 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27397 event pairs, 1091 based on Foata normal form. 622/4353 useless extension candidates. Maximal degree in co-relation 14806. Up to 3656 conditions per place. [2023-08-30 06:22:00,443 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 83 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2023-08-30 06:22:00,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 111 transitions, 1635 flow [2023-08-30 06:22:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:22:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:22:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 573 transitions. [2023-08-30 06:22:00,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37997347480106103 [2023-08-30 06:22:00,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 573 transitions. [2023-08-30 06:22:00,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 573 transitions. [2023-08-30 06:22:00,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:00,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 573 transitions. [2023-08-30 06:22:00,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,457 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,457 INFO L175 Difference]: Start difference. First operand has 140 places, 121 transitions, 1543 flow. Second operand 4 states and 573 transitions. [2023-08-30 06:22:00,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 111 transitions, 1635 flow [2023-08-30 06:22:00,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 111 transitions, 1368 flow, removed 32 selfloop flow, removed 15 redundant places. [2023-08-30 06:22:00,495 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1202 flow [2023-08-30 06:22:00,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1202, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2023-08-30 06:22:00,495 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2023-08-30 06:22:00,495 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1202 flow [2023-08-30 06:22:00,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:00,495 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:22:00,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 06:22:00,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:22:00,696 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:22:00,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1940805319, now seen corresponding path program 3 times [2023-08-30 06:22:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:22:00,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429557904] [2023-08-30 06:22:00,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:22:00,697 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 06:22:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:22:00,697 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:22:00,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:22:00,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:22:00,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:22:00,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:22:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:00,905 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:22:00,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:22:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:01,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:04,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:22:04,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429557904] [2023-08-30 06:22:04,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429557904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:04,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:22:04,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:22:04,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936578600] [2023-08-30 06:22:04,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:04,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:22:04,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:22:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:22:04,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:22:21,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 377 [2023-08-30 06:22:21,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1202 flow. Second operand has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:21,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:21,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 377 [2023-08-30 06:22:21,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:32,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:34,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:36,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:37,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:39,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:41,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:43,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:45,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:47,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:49,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:22:57,346 INFO L130 PetriNetUnfolder]: 2991/5592 cut-off events. [2023-08-30 06:22:57,346 INFO L131 PetriNetUnfolder]: For 15192/15192 co-relation queries the response was YES. [2023-08-30 06:22:57,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17873 conditions, 5592 events. 2991/5592 cut-off events. For 15192/15192 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 41472 event pairs, 1596 based on Foata normal form. 24/5604 useless extension candidates. Maximal degree in co-relation 17829. Up to 1237 conditions per place. [2023-08-30 06:22:57,367 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 344 selfloop transitions, 69 changer transitions 0/415 dead transitions. [2023-08-30 06:22:57,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 415 transitions, 4412 flow [2023-08-30 06:22:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:22:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:22:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3403 transitions. [2023-08-30 06:22:57,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376105216622458 [2023-08-30 06:22:57,372 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3403 transitions. [2023-08-30 06:22:57,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3403 transitions. [2023-08-30 06:22:57,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:57,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3403 transitions. [2023-08-30 06:22:57,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 141.79166666666666) internal successors, (3403), 24 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:57,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 377.0) internal successors, (9425), 25 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:57,382 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 377.0) internal successors, (9425), 25 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:57,382 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1202 flow. Second operand 24 states and 3403 transitions. [2023-08-30 06:22:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 415 transitions, 4412 flow [2023-08-30 06:22:57,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 415 transitions, 4231 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-08-30 06:22:57,412 INFO L231 Difference]: Finished difference. Result has 156 places, 141 transitions, 1686 flow [2023-08-30 06:22:57,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1686, PETRI_PLACES=156, PETRI_TRANSITIONS=141} [2023-08-30 06:22:57,413 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2023-08-30 06:22:57,413 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 141 transitions, 1686 flow [2023-08-30 06:22:57,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:57,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:57,414 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-08-30 06:22:57,427 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 (21)] Ended with exit code 0 [2023-08-30 06:22:57,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:22:57,621 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:22:57,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash -814545728, now seen corresponding path program 1 times [2023-08-30 06:22:57,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:22:57,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978303077] [2023-08-30 06:22:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:57,622 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 06:22:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:22:57,623 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:22:57,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 06:22:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:57,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:22:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:57,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:22:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:58,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:23:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:23:02,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:23:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978303077] [2023-08-30 06:23:02,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978303077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:23:02,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:23:02,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-08-30 06:23:02,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601491653] [2023-08-30 06:23:02,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:23:02,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 06:23:02,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:23:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 06:23:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-08-30 06:23:39,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 377 [2023-08-30 06:23:39,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 141 transitions, 1686 flow. Second operand has 30 states, 30 states have (on average 131.03333333333333) internal successors, (3931), 30 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:39,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:23:39,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 377 [2023-08-30 06:23:39,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:23:48,653 WARN L222 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:23:51,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:23:53,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:23:55,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:23:57,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:23:59,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:01,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:03,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:05,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:06,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:08,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:10,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:12,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:14,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:24:21,304 WARN L222 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:24:28,282 WARN L222 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:24:50,507 INFO L130 PetriNetUnfolder]: 6452/12053 cut-off events. [2023-08-30 06:24:50,508 INFO L131 PetriNetUnfolder]: For 33266/33266 co-relation queries the response was YES. [2023-08-30 06:24:50,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37145 conditions, 12053 events. 6452/12053 cut-off events. For 33266/33266 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 93675 event pairs, 3458 based on Foata normal form. 60/12101 useless extension candidates. Maximal degree in co-relation 37087. Up to 2441 conditions per place. [2023-08-30 06:24:50,574 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 741 selfloop transitions, 82 changer transitions 0/825 dead transitions. [2023-08-30 06:24:50,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 825 transitions, 8766 flow [2023-08-30 06:24:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 06:24:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 06:24:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4323 transitions. [2023-08-30 06:24:50,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822281167108753 [2023-08-30 06:24:50,580 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4323 transitions. [2023-08-30 06:24:50,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4323 transitions. [2023-08-30 06:24:50,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:24:50,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4323 transitions. [2023-08-30 06:24:50,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 144.1) internal successors, (4323), 30 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:50,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 377.0) internal successors, (11687), 31 states have internal predecessors, (11687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:50,589 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 377.0) internal successors, (11687), 31 states have internal predecessors, (11687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:50,589 INFO L175 Difference]: Start difference. First operand has 156 places, 141 transitions, 1686 flow. Second operand 30 states and 4323 transitions. [2023-08-30 06:24:50,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 825 transitions, 8766 flow [2023-08-30 06:24:50,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 825 transitions, 8523 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-08-30 06:24:50,633 INFO L231 Difference]: Finished difference. Result has 191 places, 162 transitions, 2115 flow [2023-08-30 06:24:50,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2115, PETRI_PLACES=191, PETRI_TRANSITIONS=162} [2023-08-30 06:24:50,634 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2023-08-30 06:24:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 162 transitions, 2115 flow [2023-08-30 06:24:50,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 131.03333333333333) internal successors, (3931), 30 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:50,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:24:50,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:24:50,642 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 (22)] Ended with exit code 0 [2023-08-30 06:24:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:24:50,842 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:24:50,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:24:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1174638607, now seen corresponding path program 1 times [2023-08-30 06:24:50,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:24:50,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213108670] [2023-08-30 06:24:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:24:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:24:50,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:24:50,844 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:24:50,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 06:24:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:24:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:24:50,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:24:51,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:24:51,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 28 [2023-08-30 06:24:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:24:51,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:24:51,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:24:51,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 135 treesize of output 30 [2023-08-30 06:24:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:24:51,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:24:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213108670] [2023-08-30 06:24:51,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213108670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:24:51,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:24:51,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 06:24:51,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352976545] [2023-08-30 06:24:51,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:24:51,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:24:51,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:24:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:24:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:24:51,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 377 [2023-08-30 06:24:51,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 162 transitions, 2115 flow. Second operand has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:51,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:24:51,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 377 [2023-08-30 06:24:51,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:24:54,364 INFO L130 PetriNetUnfolder]: 6902/12500 cut-off events. [2023-08-30 06:24:54,364 INFO L131 PetriNetUnfolder]: For 26676/26676 co-relation queries the response was YES. [2023-08-30 06:24:54,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38933 conditions, 12500 events. 6902/12500 cut-off events. For 26676/26676 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 94373 event pairs, 944 based on Foata normal form. 3/12491 useless extension candidates. Maximal degree in co-relation 38858. Up to 9625 conditions per place. [2023-08-30 06:24:54,464 INFO L137 encePairwiseOnDemand]: 368/377 looper letters, 100 selfloop transitions, 80 changer transitions 11/193 dead transitions. [2023-08-30 06:24:54,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 193 transitions, 2620 flow [2023-08-30 06:24:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:24:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:24:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1403 transitions. [2023-08-30 06:24:54,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721485411140584 [2023-08-30 06:24:54,467 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1403 transitions. [2023-08-30 06:24:54,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1403 transitions. [2023-08-30 06:24:54,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:24:54,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1403 transitions. [2023-08-30 06:24:54,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:54,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:54,471 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:54,471 INFO L175 Difference]: Start difference. First operand has 191 places, 162 transitions, 2115 flow. Second operand 10 states and 1403 transitions. [2023-08-30 06:24:54,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 193 transitions, 2620 flow [2023-08-30 06:24:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 193 transitions, 2494 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-08-30 06:24:54,563 INFO L231 Difference]: Finished difference. Result has 190 places, 159 transitions, 2138 flow [2023-08-30 06:24:54,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2138, PETRI_PLACES=190, PETRI_TRANSITIONS=159} [2023-08-30 06:24:54,563 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2023-08-30 06:24:54,563 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 159 transitions, 2138 flow [2023-08-30 06:24:54,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:54,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:24:54,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:24:54,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:24:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:24:54,769 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:24:54,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:24:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash 602100289, now seen corresponding path program 1 times [2023-08-30 06:24:54,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:24:54,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388244001] [2023-08-30 06:24:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:24:54,770 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 06:24:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:24:54,771 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:24:54,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 06:24:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:24:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:24:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:24:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:24:54,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:24:54,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:24:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388244001] [2023-08-30 06:24:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388244001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:24:54,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:24:54,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:24:54,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210262] [2023-08-30 06:24:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:24:54,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:24:54,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:24:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:24:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:24:55,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 377 [2023-08-30 06:24:55,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 159 transitions, 2138 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:55,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:24:55,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 377 [2023-08-30 06:24:55,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:24:57,462 INFO L130 PetriNetUnfolder]: 8676/16479 cut-off events. [2023-08-30 06:24:57,463 INFO L131 PetriNetUnfolder]: For 39979/39979 co-relation queries the response was YES. [2023-08-30 06:24:57,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49712 conditions, 16479 events. 8676/16479 cut-off events. For 39979/39979 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 130084 event pairs, 2866 based on Foata normal form. 308/16787 useless extension candidates. Maximal degree in co-relation 49634. Up to 8814 conditions per place. [2023-08-30 06:24:57,549 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 178 selfloop transitions, 18 changer transitions 13/209 dead transitions. [2023-08-30 06:24:57,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 209 transitions, 2908 flow [2023-08-30 06:24:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:24:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:24:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-30 06:24:57,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005305039787798 [2023-08-30 06:24:57,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-30 06:24:57,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-30 06:24:57,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:24:57,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-30 06:24:57,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:57,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:57,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:57,553 INFO L175 Difference]: Start difference. First operand has 190 places, 159 transitions, 2138 flow. Second operand 5 states and 755 transitions. [2023-08-30 06:24:57,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 209 transitions, 2908 flow [2023-08-30 06:24:57,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 209 transitions, 2787 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-30 06:24:57,651 INFO L231 Difference]: Finished difference. Result has 187 places, 162 transitions, 2152 flow [2023-08-30 06:24:57,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2152, PETRI_PLACES=187, PETRI_TRANSITIONS=162} [2023-08-30 06:24:57,652 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2023-08-30 06:24:57,652 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 162 transitions, 2152 flow [2023-08-30 06:24:57,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:57,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:24:57,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:24:57,660 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 (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:24:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:24:57,852 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:24:57,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:24:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1539091381, now seen corresponding path program 2 times [2023-08-30 06:24:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:24:57,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910816606] [2023-08-30 06:24:57,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:24:57,853 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 06:24:57,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:24:57,854 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:24:57,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 06:24:58,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:24:58,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:24:58,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:24:58,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:24:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:24:58,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:24:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:24:58,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:24:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910816606] [2023-08-30 06:24:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910816606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:24:58,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:24:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 06:24:58,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792400362] [2023-08-30 06:24:58,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:24:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:24:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:24:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:24:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:24:58,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:24:58,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 162 transitions, 2152 flow. Second operand has 10 states, 10 states have (on average 142.5) internal successors, (1425), 10 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:58,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:24:58,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:24:58,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:02,827 INFO L130 PetriNetUnfolder]: 12876/23956 cut-off events. [2023-08-30 06:25:02,828 INFO L131 PetriNetUnfolder]: For 61010/61010 co-relation queries the response was YES. [2023-08-30 06:25:02,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84206 conditions, 23956 events. 12876/23956 cut-off events. For 61010/61010 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 194656 event pairs, 1534 based on Foata normal form. 1184/25140 useless extension candidates. Maximal degree in co-relation 84127. Up to 6930 conditions per place. [2023-08-30 06:25:03,001 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 197 selfloop transitions, 33 changer transitions 1/231 dead transitions. [2023-08-30 06:25:03,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 231 transitions, 3080 flow [2023-08-30 06:25:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:25:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:25:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1190 transitions. [2023-08-30 06:25:03,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39456233421750664 [2023-08-30 06:25:03,004 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1190 transitions. [2023-08-30 06:25:03,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1190 transitions. [2023-08-30 06:25:03,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:03,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1190 transitions. [2023-08-30 06:25:03,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.75) internal successors, (1190), 8 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:03,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 377.0) internal successors, (3393), 9 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:03,006 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 377.0) internal successors, (3393), 9 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:03,006 INFO L175 Difference]: Start difference. First operand has 187 places, 162 transitions, 2152 flow. Second operand 8 states and 1190 transitions. [2023-08-30 06:25:03,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 231 transitions, 3080 flow [2023-08-30 06:25:03,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 231 transitions, 2987 flow, removed 38 selfloop flow, removed 2 redundant places. [2023-08-30 06:25:03,470 INFO L231 Difference]: Finished difference. Result has 196 places, 180 transitions, 2407 flow [2023-08-30 06:25:03,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2407, PETRI_PLACES=196, PETRI_TRANSITIONS=180} [2023-08-30 06:25:03,470 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2023-08-30 06:25:03,471 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 180 transitions, 2407 flow [2023-08-30 06:25:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.5) internal successors, (1425), 10 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:03,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:03,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:03,481 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 (25)] Ended with exit code 0 [2023-08-30 06:25:03,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:25:03,672 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:25:03,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -442484051, now seen corresponding path program 3 times [2023-08-30 06:25:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:25:03,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008164365] [2023-08-30 06:25:03,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:25:03,672 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 06:25:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:25:03,673 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:25:03,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 06:25:03,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:25:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:25:03,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:25:03,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:25:03,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:25:03,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008164365] [2023-08-30 06:25:03,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008164365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:03,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:03,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:25:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807656021] [2023-08-30 06:25:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:03,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:25:03,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:25:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:25:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:25:03,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 377 [2023-08-30 06:25:03,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 180 transitions, 2407 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:03,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:03,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 377 [2023-08-30 06:25:03,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:09,132 INFO L130 PetriNetUnfolder]: 15148/28835 cut-off events. [2023-08-30 06:25:09,132 INFO L131 PetriNetUnfolder]: For 136686/136686 co-relation queries the response was YES. [2023-08-30 06:25:09,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127168 conditions, 28835 events. 15148/28835 cut-off events. For 136686/136686 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 246741 event pairs, 5498 based on Foata normal form. 154/28989 useless extension candidates. Maximal degree in co-relation 127085. Up to 19760 conditions per place. [2023-08-30 06:25:09,441 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 194 selfloop transitions, 28 changer transitions 9/231 dead transitions. [2023-08-30 06:25:09,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 231 transitions, 3358 flow [2023-08-30 06:25:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:25:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:25:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 753 transitions. [2023-08-30 06:25:09,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39946949602122017 [2023-08-30 06:25:09,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 753 transitions. [2023-08-30 06:25:09,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 753 transitions. [2023-08-30 06:25:09,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:09,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 753 transitions. [2023-08-30 06:25:09,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:09,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:09,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:09,446 INFO L175 Difference]: Start difference. First operand has 196 places, 180 transitions, 2407 flow. Second operand 5 states and 753 transitions. [2023-08-30 06:25:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 231 transitions, 3358 flow [2023-08-30 06:25:11,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 231 transitions, 3278 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-30 06:25:11,371 INFO L231 Difference]: Finished difference. Result has 201 places, 186 transitions, 2556 flow [2023-08-30 06:25:11,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2556, PETRI_PLACES=201, PETRI_TRANSITIONS=186} [2023-08-30 06:25:11,372 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2023-08-30 06:25:11,372 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 186 transitions, 2556 flow [2023-08-30 06:25:11,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:11,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:11,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:11,380 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 (26)] Ended with exit code 0 [2023-08-30 06:25:11,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:25:11,580 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:25:11,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:11,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1124600537, now seen corresponding path program 4 times [2023-08-30 06:25:11,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:25:11,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175795705] [2023-08-30 06:25:11,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:25:11,581 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 06:25:11,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:25:11,582 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:25:11,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 06:25:11,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:25:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:11,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:25:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:25:11,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:25:11,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:25:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175795705] [2023-08-30 06:25:11,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175795705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:11,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:25:11,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 06:25:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035286413] [2023-08-30 06:25:11,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:11,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:25:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:25:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:25:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:25:12,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:25:12,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 186 transitions, 2556 flow. Second operand has 10 states, 10 states have (on average 142.7) internal successors, (1427), 10 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:12,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:12,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:25:12,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:20,657 INFO L130 PetriNetUnfolder]: 21554/41989 cut-off events. [2023-08-30 06:25:20,657 INFO L131 PetriNetUnfolder]: For 265977/265977 co-relation queries the response was YES. [2023-08-30 06:25:21,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202409 conditions, 41989 events. 21554/41989 cut-off events. For 265977/265977 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 391181 event pairs, 2310 based on Foata normal form. 1628/43617 useless extension candidates. Maximal degree in co-relation 202323. Up to 19800 conditions per place. [2023-08-30 06:25:21,183 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 222 selfloop transitions, 81 changer transitions 5/308 dead transitions. [2023-08-30 06:25:21,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 308 transitions, 4339 flow [2023-08-30 06:25:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:25:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:25:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1633 transitions. [2023-08-30 06:25:21,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3937786351579455 [2023-08-30 06:25:21,186 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1633 transitions. [2023-08-30 06:25:21,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1633 transitions. [2023-08-30 06:25:21,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:21,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1633 transitions. [2023-08-30 06:25:21,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 148.45454545454547) internal successors, (1633), 11 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 377.0) internal successors, (4524), 12 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,191 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 377.0) internal successors, (4524), 12 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:21,191 INFO L175 Difference]: Start difference. First operand has 201 places, 186 transitions, 2556 flow. Second operand 11 states and 1633 transitions. [2023-08-30 06:25:21,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 308 transitions, 4339 flow [2023-08-30 06:25:26,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 308 transitions, 4111 flow, removed 83 selfloop flow, removed 2 redundant places. [2023-08-30 06:25:26,934 INFO L231 Difference]: Finished difference. Result has 216 places, 239 transitions, 3434 flow [2023-08-30 06:25:26,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3434, PETRI_PLACES=216, PETRI_TRANSITIONS=239} [2023-08-30 06:25:26,934 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2023-08-30 06:25:26,934 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 239 transitions, 3434 flow [2023-08-30 06:25:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.7) internal successors, (1427), 10 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:26,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:26,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:26,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:27,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:25:27,135 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:25:27,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1489472423, now seen corresponding path program 5 times [2023-08-30 06:25:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:25:27,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53081345] [2023-08-30 06:25:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:25:27,136 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 06:25:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:25:27,137 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:25:27,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 06:25:27,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:25:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:25:27,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:25:27,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:25:27,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53081345] [2023-08-30 06:25:27,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53081345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:27,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:27,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:25:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197219390] [2023-08-30 06:25:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:27,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:25:27,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:25:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:25:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:25:27,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-08-30 06:25:27,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 239 transitions, 3434 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:27,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:27,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-08-30 06:25:27,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:35,717 INFO L130 PetriNetUnfolder]: 20900/41335 cut-off events. [2023-08-30 06:25:35,717 INFO L131 PetriNetUnfolder]: For 327294/327294 co-relation queries the response was YES. [2023-08-30 06:25:36,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225962 conditions, 41335 events. 20900/41335 cut-off events. For 327294/327294 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 386878 event pairs, 8454 based on Foata normal form. 462/41797 useless extension candidates. Maximal degree in co-relation 225869. Up to 28084 conditions per place. [2023-08-30 06:25:36,149 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 199 selfloop transitions, 73 changer transitions 8/280 dead transitions. [2023-08-30 06:25:36,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 280 transitions, 4426 flow [2023-08-30 06:25:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:25:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:25:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 749 transitions. [2023-08-30 06:25:36,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39734748010610077 [2023-08-30 06:25:36,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 749 transitions. [2023-08-30 06:25:36,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 749 transitions. [2023-08-30 06:25:36,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:36,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 749 transitions. [2023-08-30 06:25:36,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.8) internal successors, (749), 5 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:36,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:36,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:36,154 INFO L175 Difference]: Start difference. First operand has 216 places, 239 transitions, 3434 flow. Second operand 5 states and 749 transitions. [2023-08-30 06:25:36,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 280 transitions, 4426 flow [2023-08-30 06:25:41,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 280 transitions, 4376 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-30 06:25:41,155 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 3967 flow [2023-08-30 06:25:41,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3967, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2023-08-30 06:25:41,156 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 167 predicate places. [2023-08-30 06:25:41,156 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 3967 flow [2023-08-30 06:25:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:41,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:41,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:41,167 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 (28)] Ended with exit code 0 [2023-08-30 06:25:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:25:41,356 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:25:41,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash -164258713, now seen corresponding path program 6 times [2023-08-30 06:25:41,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:25:41,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459048148] [2023-08-30 06:25:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:25:41,357 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 06:25:41,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:25:41,358 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:25:41,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 06:25:41,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 06:25:41,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:41,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:25:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:25:41,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:25:41,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:25:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459048148] [2023-08-30 06:25:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459048148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:25:41,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:25:41,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:25:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378204416] [2023-08-30 06:25:41,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:25:41,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:25:41,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:25:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:25:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:25:41,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 377 [2023-08-30 06:25:41,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 3967 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:41,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:41,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 377 [2023-08-30 06:25:41,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:25:48,952 INFO L130 PetriNetUnfolder]: 19159/36851 cut-off events. [2023-08-30 06:25:48,952 INFO L131 PetriNetUnfolder]: For 349695/349695 co-relation queries the response was YES. [2023-08-30 06:25:49,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213519 conditions, 36851 events. 19159/36851 cut-off events. For 349695/349695 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 329512 event pairs, 8126 based on Foata normal form. 462/37313 useless extension candidates. Maximal degree in co-relation 213423. Up to 29064 conditions per place. [2023-08-30 06:25:49,340 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 219 selfloop transitions, 58 changer transitions 12/289 dead transitions. [2023-08-30 06:25:49,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 289 transitions, 4731 flow [2023-08-30 06:25:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:25:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:25:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 897 transitions. [2023-08-30 06:25:49,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2023-08-30 06:25:49,342 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 897 transitions. [2023-08-30 06:25:49,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 897 transitions. [2023-08-30 06:25:49,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:25:49,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 897 transitions. [2023-08-30 06:25:49,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:49,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:49,345 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:49,345 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 3967 flow. Second operand 6 states and 897 transitions. [2023-08-30 06:25:49,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 289 transitions, 4731 flow [2023-08-30 06:25:52,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 289 transitions, 4624 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-08-30 06:25:52,869 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 4001 flow [2023-08-30 06:25:52,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4001, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2023-08-30 06:25:52,869 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 170 predicate places. [2023-08-30 06:25:52,869 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 4001 flow [2023-08-30 06:25:52,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:52,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:52,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:52,878 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:53,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:25:53,075 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:25:53,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1971947389, now seen corresponding path program 7 times [2023-08-30 06:25:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:25:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846789133] [2023-08-30 06:25:53,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:25:53,075 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 06:25:53,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:25:53,077 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:25:53,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 06:25:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:53,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:25:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:25:53,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:25:53,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:25:53,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846789133] [2023-08-30 06:25:53,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846789133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:53,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:25:53,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 06:25:53,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620516888] [2023-08-30 06:25:53,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:53,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:25:53,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:25:53,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:25:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:25:53,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:25:53,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 4001 flow. Second operand has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:53,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:53,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:25:53,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:01,494 INFO L130 PetriNetUnfolder]: 20248/38971 cut-off events. [2023-08-30 06:26:01,494 INFO L131 PetriNetUnfolder]: For 359346/359346 co-relation queries the response was YES. [2023-08-30 06:26:01,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219719 conditions, 38971 events. 20248/38971 cut-off events. For 359346/359346 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 351179 event pairs, 7110 based on Foata normal form. 1628/40599 useless extension candidates. Maximal degree in co-relation 219623. Up to 27646 conditions per place. [2023-08-30 06:26:01,977 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 219 selfloop transitions, 94 changer transitions 4/317 dead transitions. [2023-08-30 06:26:01,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 317 transitions, 5148 flow [2023-08-30 06:26:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:26:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:26:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1472 transitions. [2023-08-30 06:26:01,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904509283819629 [2023-08-30 06:26:01,983 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1472 transitions. [2023-08-30 06:26:01,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1472 transitions. [2023-08-30 06:26:01,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:01,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1472 transitions. [2023-08-30 06:26:01,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 147.2) internal successors, (1472), 10 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:01,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:01,987 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:01,987 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 4001 flow. Second operand 10 states and 1472 transitions. [2023-08-30 06:26:01,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 317 transitions, 5148 flow [2023-08-30 06:26:07,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 317 transitions, 4913 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-30 06:26:07,277 INFO L231 Difference]: Finished difference. Result has 231 places, 282 transitions, 4348 flow [2023-08-30 06:26:07,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4348, PETRI_PLACES=231, PETRI_TRANSITIONS=282} [2023-08-30 06:26:07,278 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2023-08-30 06:26:07,278 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 282 transitions, 4348 flow [2023-08-30 06:26:07,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:07,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:07,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:07,291 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 (30)] Forceful destruction successful, exit code 0 [2023-08-30 06:26:07,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:26:07,491 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:26:07,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash 50148369, now seen corresponding path program 2 times [2023-08-30 06:26:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:26:07,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261277721] [2023-08-30 06:26:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:26:07,491 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 06:26:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:26:07,492 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:26:07,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 06:26:07,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:26:07,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:26:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:26:07,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:26:07,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:26:07,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:26:07,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261277721] [2023-08-30 06:26:07,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261277721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:26:07,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:26:07,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:26:07,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394413287] [2023-08-30 06:26:07,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:26:07,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:26:07,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:26:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:26:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:26:07,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 377 [2023-08-30 06:26:07,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 282 transitions, 4348 flow. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:07,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:07,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 377 [2023-08-30 06:26:07,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:17,624 INFO L130 PetriNetUnfolder]: 25075/47920 cut-off events. [2023-08-30 06:26:17,624 INFO L131 PetriNetUnfolder]: For 426615/426615 co-relation queries the response was YES. [2023-08-30 06:26:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285204 conditions, 47920 events. 25075/47920 cut-off events. For 426615/426615 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 441666 event pairs, 6290 based on Foata normal form. 296/48216 useless extension candidates. Maximal degree in co-relation 285107. Up to 20776 conditions per place. [2023-08-30 06:26:18,407 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 220 selfloop transitions, 96 changer transitions 0/316 dead transitions. [2023-08-30 06:26:18,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 316 transitions, 5367 flow [2023-08-30 06:26:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:26:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:26:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-30 06:26:18,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40212201591511937 [2023-08-30 06:26:18,409 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-30 06:26:18,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-30 06:26:18,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:18,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-30 06:26:18,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:18,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:18,411 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:18,411 INFO L175 Difference]: Start difference. First operand has 231 places, 282 transitions, 4348 flow. Second operand 5 states and 758 transitions. [2023-08-30 06:26:18,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 316 transitions, 5367 flow [2023-08-30 06:26:28,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 316 transitions, 5090 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-08-30 06:26:28,621 INFO L231 Difference]: Finished difference. Result has 229 places, 294 transitions, 4564 flow [2023-08-30 06:26:28,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4564, PETRI_PLACES=229, PETRI_TRANSITIONS=294} [2023-08-30 06:26:28,621 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2023-08-30 06:26:28,621 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 294 transitions, 4564 flow [2023-08-30 06:26:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:28,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:28,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:28,632 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 (31)] Ended with exit code 0 [2023-08-30 06:26:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:26:28,830 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:26:28,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash -800661259, now seen corresponding path program 3 times [2023-08-30 06:26:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:26:28,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502431856] [2023-08-30 06:26:28,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:26:28,831 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 06:26:28,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:26:28,831 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:26:28,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 06:26:29,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:26:29,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:26:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:26:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:26:29,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:26:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:26:29,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:26:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502431856] [2023-08-30 06:26:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502431856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:26:29,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:26:29,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 06:26:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791047854] [2023-08-30 06:26:29,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:26:29,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:26:29,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:26:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:26:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:26:29,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:26:29,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 294 transitions, 4564 flow. Second operand has 10 states, 10 states have (on average 142.5) internal successors, (1425), 10 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:29,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:29,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:26:29,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:26:40,536 INFO L130 PetriNetUnfolder]: 27243/51714 cut-off events. [2023-08-30 06:26:40,537 INFO L131 PetriNetUnfolder]: For 521270/521270 co-relation queries the response was YES. [2023-08-30 06:26:41,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319807 conditions, 51714 events. 27243/51714 cut-off events. For 521270/521270 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 478514 event pairs, 10665 based on Foata normal form. 888/52602 useless extension candidates. Maximal degree in co-relation 319711. Up to 39961 conditions per place. [2023-08-30 06:26:41,339 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 252 selfloop transitions, 86 changer transitions 1/339 dead transitions. [2023-08-30 06:26:41,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 339 transitions, 5644 flow [2023-08-30 06:26:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:26:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:26:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1473 transitions. [2023-08-30 06:26:41,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907161803713528 [2023-08-30 06:26:41,342 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1473 transitions. [2023-08-30 06:26:41,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1473 transitions. [2023-08-30 06:26:41,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:26:41,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1473 transitions. [2023-08-30 06:26:41,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 147.3) internal successors, (1473), 10 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:41,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:41,346 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:41,346 INFO L175 Difference]: Start difference. First operand has 229 places, 294 transitions, 4564 flow. Second operand 10 states and 1473 transitions. [2023-08-30 06:26:41,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 339 transitions, 5644 flow [2023-08-30 06:26:52,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 339 transitions, 5504 flow, removed 37 selfloop flow, removed 3 redundant places. [2023-08-30 06:26:52,416 INFO L231 Difference]: Finished difference. Result has 238 places, 306 transitions, 4890 flow [2023-08-30 06:26:52,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4890, PETRI_PLACES=238, PETRI_TRANSITIONS=306} [2023-08-30 06:26:52,416 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2023-08-30 06:26:52,417 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 306 transitions, 4890 flow [2023-08-30 06:26:52,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.5) internal successors, (1425), 10 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:52,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:26:52,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:26:52,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 06:26:52,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:26:52,621 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:26:52,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:26:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1673249165, now seen corresponding path program 4 times [2023-08-30 06:26:52,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:26:52,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678800278] [2023-08-30 06:26:52,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:26:52,622 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 06:26:52,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:26:52,623 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:26:52,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 06:26:52,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:26:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:26:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:26:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:26:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:26:52,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:26:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:26:52,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:26:52,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678800278] [2023-08-30 06:26:52,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678800278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:26:52,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:26:52,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 06:26:52,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756114618] [2023-08-30 06:26:52,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:26:52,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:26:52,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:26:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:26:52,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:26:53,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:26:53,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 306 transitions, 4890 flow. Second operand has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:26:53,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:26:53,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:26:53,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:27:05,340 INFO L130 PetriNetUnfolder]: 29851/56664 cut-off events. [2023-08-30 06:27:05,340 INFO L131 PetriNetUnfolder]: For 564605/564605 co-relation queries the response was YES. [2023-08-30 06:27:06,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357428 conditions, 56664 events. 29851/56664 cut-off events. For 564605/564605 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 530542 event pairs, 3910 based on Foata normal form. 888/57552 useless extension candidates. Maximal degree in co-relation 357329. Up to 36982 conditions per place. [2023-08-30 06:27:06,316 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 240 selfloop transitions, 111 changer transitions 2/353 dead transitions. [2023-08-30 06:27:06,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 353 transitions, 6075 flow [2023-08-30 06:27:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:27:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:27:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1469 transitions. [2023-08-30 06:27:06,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2023-08-30 06:27:06,319 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1469 transitions. [2023-08-30 06:27:06,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1469 transitions. [2023-08-30 06:27:06,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:27:06,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1469 transitions. [2023-08-30 06:27:06,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.9) internal successors, (1469), 10 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:06,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:06,323 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 377.0) internal successors, (4147), 11 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:06,323 INFO L175 Difference]: Start difference. First operand has 238 places, 306 transitions, 4890 flow. Second operand 10 states and 1469 transitions. [2023-08-30 06:27:06,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 353 transitions, 6075 flow [2023-08-30 06:27:19,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 353 transitions, 5856 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-08-30 06:27:19,330 INFO L231 Difference]: Finished difference. Result has 246 places, 320 transitions, 5312 flow [2023-08-30 06:27:19,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5312, PETRI_PLACES=246, PETRI_TRANSITIONS=320} [2023-08-30 06:27:19,330 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2023-08-30 06:27:19,330 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 320 transitions, 5312 flow [2023-08-30 06:27:19,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:19,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:27:19,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:27:19,340 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 (33)] Forceful destruction successful, exit code 0 [2023-08-30 06:27:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:27:19,531 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:27:19,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:27:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash 235626368, now seen corresponding path program 1 times [2023-08-30 06:27:19,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:27:19,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911025003] [2023-08-30 06:27:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:27:19,532 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 06:27:19,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:27:19,533 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:27:19,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-08-30 06:27:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:27:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:27:19,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:27:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 06:27:19,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:27:22,951 INFO L321 Elim1Store]: treesize reduction 48, result has 84.1 percent of original size [2023-08-30 06:27:22,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 418 treesize of output 331 [2023-08-30 06:27:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:27:25,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:27:25,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911025003] [2023-08-30 06:27:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911025003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:27:25,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:27:25,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3] total 4 [2023-08-30 06:27:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827770249] [2023-08-30 06:27:25,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:27:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:27:25,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:27:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:27:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=18, Unknown=2, NotChecked=0, Total=30 [2023-08-30 06:27:27,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:27:29,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:27:31,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:27:33,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:27:36,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:27:36,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-08-30 06:27:36,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 320 transitions, 5312 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:36,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:27:36,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-08-30 06:27:36,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:27:38,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:27:54,768 INFO L130 PetriNetUnfolder]: 33381/63786 cut-off events. [2023-08-30 06:27:54,768 INFO L131 PetriNetUnfolder]: For 830234/832482 co-relation queries the response was YES. [2023-08-30 06:27:55,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428314 conditions, 63786 events. 33381/63786 cut-off events. For 830234/832482 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 621072 event pairs, 5895 based on Foata normal form. 1855/65031 useless extension candidates. Maximal degree in co-relation 428211. Up to 45441 conditions per place. [2023-08-30 06:27:56,118 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 220 selfloop transitions, 126 changer transitions 2/356 dead transitions. [2023-08-30 06:27:56,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 356 transitions, 6495 flow [2023-08-30 06:27:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:27:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:27:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-30 06:27:56,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39190981432360744 [2023-08-30 06:27:56,121 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-30 06:27:56,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-30 06:27:56,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:27:56,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-30 06:27:56,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:56,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:56,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:27:56,122 INFO L175 Difference]: Start difference. First operand has 246 places, 320 transitions, 5312 flow. Second operand 4 states and 591 transitions. [2023-08-30 06:27:56,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 356 transitions, 6495 flow [2023-08-30 06:28:10,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 356 transitions, 6312 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-08-30 06:28:10,449 INFO L231 Difference]: Finished difference. Result has 246 places, 340 transitions, 6004 flow [2023-08-30 06:28:10,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6004, PETRI_PLACES=246, PETRI_TRANSITIONS=340} [2023-08-30 06:28:10,449 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2023-08-30 06:28:10,449 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 340 transitions, 6004 flow [2023-08-30 06:28:10,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:10,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:28:10,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:28:10,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-08-30 06:28:10,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:28:10,653 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:28:10,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:28:10,653 INFO L85 PathProgramCache]: Analyzing trace with hash 692142934, now seen corresponding path program 2 times [2023-08-30 06:28:10,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:28:10,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988706750] [2023-08-30 06:28:10,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:28:10,654 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 06:28:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:28:10,654 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:28:10,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-08-30 06:28:10,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:28:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:28:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:28:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:28:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:28:10,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:28:13,851 INFO L321 Elim1Store]: treesize reduction 48, result has 84.1 percent of original size [2023-08-30 06:28:13,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 418 treesize of output 331 [2023-08-30 06:28:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:28:18,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:28:18,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988706750] [2023-08-30 06:28:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988706750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:28:18,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:28:18,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3] total 4 [2023-08-30 06:28:18,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616095942] [2023-08-30 06:28:18,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:28:18,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:28:18,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:28:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:28:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=18, Unknown=2, NotChecked=0, Total=30 [2023-08-30 06:28:20,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:28:22,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:24,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:26,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:28,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:28:30,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:32,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:34,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:36,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:38,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:40,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:28:40,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-08-30 06:28:40,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 340 transitions, 6004 flow. Second operand has 6 states, 6 states have (on average 142.83333333333334) internal successors, (857), 6 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:28:40,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:28:40,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-08-30 06:28:40,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:28:41,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:28:46,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:29:04,292 INFO L130 PetriNetUnfolder]: 40759/78160 cut-off events. [2023-08-30 06:29:04,292 INFO L131 PetriNetUnfolder]: For 1094240/1096820 co-relation queries the response was YES. [2023-08-30 06:29:05,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547416 conditions, 78160 events. 40759/78160 cut-off events. For 1094240/1096820 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 787102 event pairs, 10013 based on Foata normal form. 2182/79359 useless extension candidates. Maximal degree in co-relation 547310. Up to 58151 conditions per place. [2023-08-30 06:29:06,046 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 261 selfloop transitions, 116 changer transitions 2/387 dead transitions. [2023-08-30 06:29:06,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 387 transitions, 7454 flow [2023-08-30 06:29:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:29:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:29:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 593 transitions. [2023-08-30 06:29:06,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393236074270557 [2023-08-30 06:29:06,049 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 593 transitions. [2023-08-30 06:29:06,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 593 transitions. [2023-08-30 06:29:06,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:06,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 593 transitions. [2023-08-30 06:29:06,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:06,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:06,051 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:06,051 INFO L175 Difference]: Start difference. First operand has 246 places, 340 transitions, 6004 flow. Second operand 4 states and 593 transitions. [2023-08-30 06:29:06,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 387 transitions, 7454 flow [2023-08-30 06:29:27,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 387 transitions, 7365 flow, removed 19 selfloop flow, removed 1 redundant places. [2023-08-30 06:29:27,457 INFO L231 Difference]: Finished difference. Result has 250 places, 369 transitions, 6970 flow [2023-08-30 06:29:27,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=5919, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6970, PETRI_PLACES=250, PETRI_TRANSITIONS=369} [2023-08-30 06:29:27,458 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 195 predicate places. [2023-08-30 06:29:27,458 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 369 transitions, 6970 flow [2023-08-30 06:29:27,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.83333333333334) internal successors, (857), 6 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:27,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:27,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:29:27,466 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 (35)] Forceful destruction successful, exit code 0 [2023-08-30 06:29:27,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 06:29:27,659 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:29:27,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 960767236, now seen corresponding path program 5 times [2023-08-30 06:29:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:27,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109066401] [2023-08-30 06:29:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:29:27,660 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 06:29:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:27,660 INFO L229 MonitoredProcess]: Starting monitored process 36 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 06:29:27,661 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 (36)] Waiting until timeout for monitored process [2023-08-30 06:29:27,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:29:27,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:29:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:29:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:29:27,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:29:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 06:29:27,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109066401] [2023-08-30 06:29:27,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109066401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:29:27,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:29:27,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-08-30 06:29:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914314902] [2023-08-30 06:29:27,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:29:27,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 06:29:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 06:29:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 06:29:27,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 377 [2023-08-30 06:29:27,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 369 transitions, 6970 flow. Second operand has 7 states, 7 states have (on average 143.42857142857142) internal successors, (1004), 7 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:27,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:27,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 377 [2023-08-30 06:29:27,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:47,504 INFO L130 PetriNetUnfolder]: 42109/79872 cut-off events. [2023-08-30 06:29:47,504 INFO L131 PetriNetUnfolder]: For 1122655/1122655 co-relation queries the response was YES. [2023-08-30 06:29:49,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576893 conditions, 79872 events. 42109/79872 cut-off events. For 1122655/1122655 co-relation queries the response was YES. Maximal size of possible extension queue 1559. Compared 787202 event pairs, 8276 based on Foata normal form. 296/80168 useless extension candidates. Maximal degree in co-relation 576784. Up to 65080 conditions per place. [2023-08-30 06:29:49,360 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 304 selfloop transitions, 81 changer transitions 1/386 dead transitions. [2023-08-30 06:29:49,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 386 transitions, 7923 flow [2023-08-30 06:29:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:29:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:29:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 739 transitions. [2023-08-30 06:29:49,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920424403183024 [2023-08-30 06:29:49,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 739 transitions. [2023-08-30 06:29:49,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 739 transitions. [2023-08-30 06:29:49,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:49,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 739 transitions. [2023-08-30 06:29:49,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:49,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:49,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:49,364 INFO L175 Difference]: Start difference. First operand has 250 places, 369 transitions, 6970 flow. Second operand 5 states and 739 transitions. [2023-08-30 06:29:49,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 386 transitions, 7923 flow [2023-08-30 06:30:21,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 386 transitions, 7788 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-08-30 06:30:21,090 INFO L231 Difference]: Finished difference. Result has 253 places, 371 transitions, 7052 flow [2023-08-30 06:30:21,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=6836, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7052, PETRI_PLACES=253, PETRI_TRANSITIONS=371} [2023-08-30 06:30:21,090 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 198 predicate places. [2023-08-30 06:30:21,090 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 371 transitions, 7052 flow [2023-08-30 06:30:21,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 143.42857142857142) internal successors, (1004), 7 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:21,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:21,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:30:21,099 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 (36)] Forceful destruction successful, exit code 0 [2023-08-30 06:30:21,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 06:30:21,293 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:30:21,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1225460988, now seen corresponding path program 3 times [2023-08-30 06:30:21,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:21,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506643927] [2023-08-30 06:30:21,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:30:21,293 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 06:30:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:21,295 INFO L229 MonitoredProcess]: Starting monitored process 37 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 06:30:21,297 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 (37)] Waiting until timeout for monitored process [2023-08-30 06:30:21,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:30:21,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:30:21,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 06:30:21,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:21,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 06:30:21,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:21,995 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 06:30:21,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 189 treesize of output 154 [2023-08-30 06:30:22,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:30:22,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 73 [2023-08-30 06:30:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:30:22,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:30:26,675 INFO L321 Elim1Store]: treesize reduction 597, result has 68.2 percent of original size [2023-08-30 06:30:26,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 4096 treesize of output 3286 [2023-08-30 06:30:30,109 INFO L321 Elim1Store]: treesize reduction 273, result has 70.2 percent of original size [2023-08-30 06:30:30,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 12 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 54 case distinctions, treesize of input 2214 treesize of output 1686 [2023-08-30 06:30:30,247 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,261 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,270 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,270 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,278 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,285 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 06:30:30,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:30:30,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 346 treesize of output 238 Killed by 15