./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.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-simple-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --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 07:25:27,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:25:27,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:25:27,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:25:27,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:25:27,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:25:27,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:25:27,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:25:27,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:25:27,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:25:27,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:25:27,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:25:27,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:25:27,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:25:27,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:25:27,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:25:27,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:25:27,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:25:27,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:25:27,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:25:27,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:25:27,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:25:27,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:25:27,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:25:27,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:25:27,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:25:27,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:25:27,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:25:27,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:25:27,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:25:27,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:25:27,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:25:27,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:25:27,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:25:27,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:25:27,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:25:27,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:25:27,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:25:27,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:25:27,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:25:27,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:25:27,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:25:27,475 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:25:27,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:25:27,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:25:27,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:25:27,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:25:27,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:25:27,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:25:27,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:25:27,478 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:25:27,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:25:27,479 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:25:27,479 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:25:27,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:25:27,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:25:27,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:25:27,480 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:25:27,480 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:25:27,480 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:25:27,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:25:27,480 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:25:27,481 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:25:27,481 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:25:27,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:25:27,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:25:27,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:25:27,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:25:27,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:25:27,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:25:27,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:25:27,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:25:27,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:25:27,483 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:25:27,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:25:27,483 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:25:27,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:25:27,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:25:27,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:25:27,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:25:27,828 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:25:27,828 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:25:27,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 07:25:28,911 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:25:29,134 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:25:29,134 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 07:25:29,139 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c6f62d7/df6e8dcddcfa4cff98064a360b0cadfa/FLAG298dea763 [2023-08-30 07:25:29,151 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c6f62d7/df6e8dcddcfa4cff98064a360b0cadfa [2023-08-30 07:25:29,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:25:29,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:25:29,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:25:29,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:25:29,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:25:29,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:29" (1/1) ... [2023-08-30 07:25:29,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3669e42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:29, skipping insertion in model container [2023-08-30 07:25:29,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:29" (1/1) ... [2023-08-30 07:25:29,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:25:29,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:25:29,387 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-simple-queue.wvr.c[2438,2451] [2023-08-30 07:25:29,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:25:29,416 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 07:25:29,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cf43a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:29, skipping insertion in model container [2023-08-30 07:25:29,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:25:29,419 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:25:29,422 INFO L158 Benchmark]: Toolchain (without parser) took 266.04ms. Allocated memory is still 73.4MB. Free memory was 51.4MB in the beginning and 41.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:25:29,422 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 38.3MB in the beginning and 38.2MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:25:29,423 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.83ms. Allocated memory is still 73.4MB. Free memory was 51.2MB in the beginning and 41.8MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:25:29,424 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 38.3MB in the beginning and 38.2MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.83ms. Allocated memory is still 73.4MB. Free memory was 51.2MB in the beginning and 41.8MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 95]: 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-simple-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --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 07:25:31,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:25:31,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:25:31,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:25:31,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:25:31,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:25:31,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:25:31,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:25:31,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:25:31,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:25:31,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:25:31,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:25:31,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:25:31,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:25:31,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:25:31,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:25:31,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:25:31,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:25:31,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:25:31,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:25:31,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:25:31,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:25:31,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:25:31,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:25:31,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:25:31,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:25:31,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:25:31,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:25:31,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:25:31,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:25:31,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:25:31,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:25:31,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:25:31,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:25:31,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:25:31,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:25:31,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:25:31,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:25:31,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:25:31,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:25:31,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:25:31,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:25:31,335 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:25:31,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:25:31,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:25:31,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:25:31,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:25:31,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:25:31,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:25:31,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:25:31,339 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:25:31,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:25:31,340 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:25:31,340 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:25:31,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:25:31,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:25:31,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:25:31,341 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:25:31,341 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:25:31,341 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:25:31,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:25:31,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:25:31,341 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:25:31,342 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:25:31,342 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:25:31,342 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:25:31,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:25:31,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:25:31,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:25:31,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:25:31,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:25:31,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:25:31,343 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:25:31,343 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:25:31,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:25:31,344 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:25:31,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:25:31,344 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:25:31,344 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:25:31,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:25:31,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:25:31,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:25:31,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:25:31,659 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:25:31,659 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:25:31,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 07:25:32,915 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:25:33,076 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:25:33,076 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-30 07:25:33,092 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af7c3c1b/5ee1dcb714bc4a10a036b1fc7fe3d036/FLAG1d68a0aae [2023-08-30 07:25:33,112 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af7c3c1b/5ee1dcb714bc4a10a036b1fc7fe3d036 [2023-08-30 07:25:33,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:25:33,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:25:33,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:25:33,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:25:33,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:25:33,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c8b706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33, skipping insertion in model container [2023-08-30 07:25:33,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:25:33,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:25:33,268 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-simple-queue.wvr.c[2438,2451] [2023-08-30 07:25:33,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:25:33,286 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:25:33,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:25:33,315 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-simple-queue.wvr.c[2438,2451] [2023-08-30 07:25:33,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:25:33,326 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:25:33,357 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-08-30 07:25:33,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:25:33,368 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:25:33,373 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:25:33,379 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:25:33,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33 WrapperNode [2023-08-30 07:25:33,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:25:33,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:25:33,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:25:33,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:25:33,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,459 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 130 [2023-08-30 07:25:33,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:25:33,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:25:33,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:25:33,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:25:33,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,507 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:25:33,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:25:33,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:25:33,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:25:33,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (1/1) ... [2023-08-30 07:25:33,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:25:33,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:25:33,550 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 07:25:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:25:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:25:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:25:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:25:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:25:33,577 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 07:25:33,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:25:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:25:33,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:25:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:25:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:25:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:25:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:25:33,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:25:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:25:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:25:33,592 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 07:25:33,710 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:25:33,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:25:34,129 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:25:34,257 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:25:34,263 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:25:34,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:25:34 BoogieIcfgContainer [2023-08-30 07:25:34,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:25:34,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:25:34,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:25:34,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:25:34,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:25:33" (1/3) ... [2023-08-30 07:25:34,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b0a8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:25:34, skipping insertion in model container [2023-08-30 07:25:34,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:33" (2/3) ... [2023-08-30 07:25:34,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b0a8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:25:34, skipping insertion in model container [2023-08-30 07:25:34,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:25:34" (3/3) ... [2023-08-30 07:25:34,275 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-08-30 07:25:34,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:25:34,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 07:25:34,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:25:34,387 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:25:34,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 130 transitions, 276 flow [2023-08-30 07:25:34,519 INFO L130 PetriNetUnfolder]: 9/128 cut-off events. [2023-08-30 07:25:34,519 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:25:34,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 9/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 07:25:34,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 130 transitions, 276 flow [2023-08-30 07:25:34,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 124 transitions, 260 flow [2023-08-30 07:25:34,536 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:25:34,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 124 transitions, 260 flow [2023-08-30 07:25:34,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 124 transitions, 260 flow [2023-08-30 07:25:34,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 260 flow [2023-08-30 07:25:34,588 INFO L130 PetriNetUnfolder]: 9/124 cut-off events. [2023-08-30 07:25:34,589 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:25:34,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 9/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-30 07:25:34,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-30 07:25:45,819 INFO L134 LiptonReduction]: Checked pairs total: 988 [2023-08-30 07:25:45,819 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-30 07:25:45,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:25:45,837 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;@44fa6d59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:25:45,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 07:25:45,840 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:25:45,840 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:25:45,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:45,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:25:45,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:45,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:45,846 INFO L85 PathProgramCache]: Analyzing trace with hash 18032, now seen corresponding path program 1 times [2023-08-30 07:25:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:45,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781527489] [2023-08-30 07:25:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:45,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:45,865 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 07:25:45,901 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 07:25:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:25:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:46,160 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:25:46,161 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 07:25:46,193 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 07:25:46,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:46,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:46,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781527489] [2023-08-30 07:25:46,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781527489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:46,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:46,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050603497] [2023-08-30 07:25:46,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 07:25:46,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:46,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:46,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 07:25:46,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:46,621 INFO L130 PetriNetUnfolder]: 291/498 cut-off events. [2023-08-30 07:25:46,621 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 07:25:46,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 498 events. 291/498 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2042 event pairs, 210 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 424. Up to 251 conditions per place. [2023-08-30 07:25:46,626 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-30 07:25:46,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 248 flow [2023-08-30 07:25:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-30 07:25:46,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472636815920398 [2023-08-30 07:25:46,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-30 07:25:46,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-30 07:25:46,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:46,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-30 07:25:46,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:46,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:46,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:46,669 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 380 transitions. [2023-08-30 07:25:46,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 248 flow [2023-08-30 07:25:46,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:25:46,674 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 74 flow [2023-08-30 07:25:46,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-30 07:25:46,679 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-30 07:25:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 74 flow [2023-08-30 07:25:46,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:46,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:46,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:25:46,693 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 (2)] Ended with exit code 0 [2023-08-30 07:25:46,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:46,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:46,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:46,894 INFO L85 PathProgramCache]: Analyzing trace with hash 18070, now seen corresponding path program 1 times [2023-08-30 07:25:46,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:46,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662356433] [2023-08-30 07:25:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:46,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:46,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:46,897 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 07:25:46,903 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 07:25:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:25:46,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:46,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:47,019 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:25:47,020 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 07:25:47,037 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 07:25:47,065 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 07:25:47,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:47,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662356433] [2023-08-30 07:25:47,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662356433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:47,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:47,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598881512] [2023-08-30 07:25:47,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:47,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:47,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 07:25:47,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:47,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 07:25:47,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:47,378 INFO L130 PetriNetUnfolder]: 227/400 cut-off events. [2023-08-30 07:25:47,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:25:47,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 400 events. 227/400 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1571 event pairs, 162 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 407. Up to 400 conditions per place. [2023-08-30 07:25:47,381 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 07:25:47,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 126 flow [2023-08-30 07:25:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-08-30 07:25:47,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43532338308457713 [2023-08-30 07:25:47,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-08-30 07:25:47,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-08-30 07:25:47,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:47,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-08-30 07:25:47,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,390 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 74 flow. Second operand 3 states and 350 transitions. [2023-08-30 07:25:47,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 126 flow [2023-08-30 07:25:47,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:47,392 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 70 flow [2023-08-30 07:25:47,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-08-30 07:25:47,393 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-30 07:25:47,393 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 70 flow [2023-08-30 07:25:47,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:47,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:25:47,408 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 07:25:47,602 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 07:25:47,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:47,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 18069, now seen corresponding path program 1 times [2023-08-30 07:25:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:47,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769434455] [2023-08-30 07:25:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:47,606 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 07:25:47,608 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 07:25:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:47,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:25:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:47,696 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:25:47,696 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 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-30 07:25:47,721 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 07:25:47,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:47,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769434455] [2023-08-30 07:25:47,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769434455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:47,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:47,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104773912] [2023-08-30 07:25:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:47,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 07:25:47,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:47,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 07:25:47,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:47,975 INFO L130 PetriNetUnfolder]: 163/302 cut-off events. [2023-08-30 07:25:47,975 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:25:47,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 302 events. 163/302 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1131 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 615. Up to 302 conditions per place. [2023-08-30 07:25:47,977 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 07:25:47,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 118 flow [2023-08-30 07:25:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-30 07:25:47,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43283582089552236 [2023-08-30 07:25:47,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-30 07:25:47,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-30 07:25:47,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:47,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-30 07:25:47,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,990 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 70 flow. Second operand 3 states and 348 transitions. [2023-08-30 07:25:47,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 118 flow [2023-08-30 07:25:47,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:47,992 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 67 flow [2023-08-30 07:25:47,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-08-30 07:25:47,993 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-08-30 07:25:47,994 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 67 flow [2023-08-30 07:25:47,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:47,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:47,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:25:48,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:48,209 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 07:25:48,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:48,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash 18031, now seen corresponding path program 1 times [2023-08-30 07:25:48,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:48,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977429842] [2023-08-30 07:25:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:48,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:48,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:48,212 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 07:25:48,215 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 07:25:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:25:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:48,290 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:25:48,291 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 07:25:48,300 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 07:25:48,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:48,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:48,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977429842] [2023-08-30 07:25:48,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977429842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:48,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:48,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:48,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728945801] [2023-08-30 07:25:48,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:48,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:48,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:48,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:48,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 07:25:48,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:48,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 07:25:48,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:48,497 INFO L130 PetriNetUnfolder]: 163/300 cut-off events. [2023-08-30 07:25:48,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:25:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 300 events. 163/300 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1122 event pairs, 114 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 611. Up to 300 conditions per place. [2023-08-30 07:25:48,500 INFO L137 encePairwiseOnDemand]: 266/268 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 07:25:48,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 115 flow [2023-08-30 07:25:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-30 07:25:48,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-08-30 07:25:48,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-30 07:25:48,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-30 07:25:48,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:48,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-30 07:25:48,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,506 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 67 flow. Second operand 3 states and 346 transitions. [2023-08-30 07:25:48,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 115 flow [2023-08-30 07:25:48,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:48,507 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2023-08-30 07:25:48,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-30 07:25:48,508 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-08-30 07:25:48,508 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2023-08-30 07:25:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:48,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:48,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:25:48,520 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 07:25:48,717 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 07:25:48,718 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:48,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash 560749, now seen corresponding path program 1 times [2023-08-30 07:25:48,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:48,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912818576] [2023-08-30 07:25:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:48,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:48,720 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 07:25:48,723 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 07:25:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:25:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:48,828 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:25:48,828 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 07:25:48,889 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 07:25:48,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:25:49,062 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 07:25:49,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:49,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912818576] [2023-08-30 07:25:49,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912818576] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:25:49,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:25:49,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:25:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331502762] [2023-08-30 07:25:49,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:25:49,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:25:49,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:25:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:25:49,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:25:49,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 66 flow. Second operand has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:49,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:49,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:25:49,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:49,991 INFO L130 PetriNetUnfolder]: 246/453 cut-off events. [2023-08-30 07:25:49,991 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:25:49,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 453 events. 246/453 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1899 event pairs, 171 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 925. Up to 151 conditions per place. [2023-08-30 07:25:49,995 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 65 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-08-30 07:25:49,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 72 transitions, 318 flow [2023-08-30 07:25:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:25:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:25:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 687 transitions. [2023-08-30 07:25:49,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42723880597014924 [2023-08-30 07:25:49,998 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 687 transitions. [2023-08-30 07:25:49,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 687 transitions. [2023-08-30 07:25:49,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:49,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 687 transitions. [2023-08-30 07:25:50,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,005 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,005 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 66 flow. Second operand 6 states and 687 transitions. [2023-08-30 07:25:50,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 72 transitions, 318 flow [2023-08-30 07:25:50,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 72 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:50,008 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 119 flow [2023-08-30 07:25:50,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-30 07:25:50,011 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-30 07:25:50,011 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 119 flow [2023-08-30 07:25:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:50,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:25:50,028 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 07:25:50,221 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 07:25:50,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:50,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:50,222 INFO L85 PathProgramCache]: Analyzing trace with hash 17376030, now seen corresponding path program 1 times [2023-08-30 07:25:50,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:50,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077758666] [2023-08-30 07:25:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:50,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:50,224 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 07:25:50,225 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 07:25:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:25:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:50,309 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:25:50,309 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 22 [2023-08-30 07:25:50,325 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 07:25:50,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:50,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077758666] [2023-08-30 07:25:50,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077758666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:50,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:50,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:50,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176363913] [2023-08-30 07:25:50,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:50,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:50,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:50,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-08-30 07:25:50,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:50,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-08-30 07:25:50,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:50,516 INFO L130 PetriNetUnfolder]: 222/405 cut-off events. [2023-08-30 07:25:50,516 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:25:50,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 405 events. 222/405 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1636 event pairs, 153 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 850. Up to 405 conditions per place. [2023-08-30 07:25:50,519 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 07:25:50,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 171 flow [2023-08-30 07:25:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-30 07:25:50,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417910447761194 [2023-08-30 07:25:50,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-30 07:25:50,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-30 07:25:50,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:50,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-30 07:25:50,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,525 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 119 flow. Second operand 3 states and 336 transitions. [2023-08-30 07:25:50,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 171 flow [2023-08-30 07:25:50,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 161 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:50,527 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 107 flow [2023-08-30 07:25:50,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-30 07:25:50,527 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-30 07:25:50,528 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 107 flow [2023-08-30 07:25:50,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:50,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:25:50,543 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 07:25:50,743 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 07:25:50,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:50,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash 17376032, now seen corresponding path program 1 times [2023-08-30 07:25:50,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:50,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789393992] [2023-08-30 07:25:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:50,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:50,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:50,747 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 07:25:50,751 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 07:25:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:50,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:25:50,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:50,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:50,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:25:50,854 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:25:50,855 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 07:25:50,862 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 07:25:50,881 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 07:25:50,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:50,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789393992] [2023-08-30 07:25:50,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789393992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:50,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:50,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:25:50,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385405455] [2023-08-30 07:25:50,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:50,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:25:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:25:50,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:25:50,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 07:25:50,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:50,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:50,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 07:25:50,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:51,078 INFO L130 PetriNetUnfolder]: 198/357 cut-off events. [2023-08-30 07:25:51,078 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:25:51,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 357 events. 198/357 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1366 event pairs, 135 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 750. Up to 357 conditions per place. [2023-08-30 07:25:51,081 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 07:25:51,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 155 flow [2023-08-30 07:25:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:25:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:25:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-30 07:25:51,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42661691542288555 [2023-08-30 07:25:51,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-30 07:25:51,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-30 07:25:51,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:51,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-30 07:25:51,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,086 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 107 flow. Second operand 3 states and 343 transitions. [2023-08-30 07:25:51,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 155 flow [2023-08-30 07:25:51,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:51,088 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 104 flow [2023-08-30 07:25:51,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-30 07:25:51,088 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-30 07:25:51,089 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 104 flow [2023-08-30 07:25:51,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:51,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:25:51,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:25:51,298 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 07:25:51,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:51,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash 17376018, now seen corresponding path program 1 times [2023-08-30 07:25:51,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:51,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951354261] [2023-08-30 07:25:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:51,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:51,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:51,300 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 07:25:51,301 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 07:25:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:25:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:51,411 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 07:25:51,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:51,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951354261] [2023-08-30 07:25:51,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951354261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:51,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:51,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:25:51,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527074672] [2023-08-30 07:25:51,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:51,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:25:51,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:25:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:25:51,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 268 [2023-08-30 07:25:51,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 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 07:25:51,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:51,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 268 [2023-08-30 07:25:51,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:51,664 INFO L130 PetriNetUnfolder]: 142/269 cut-off events. [2023-08-30 07:25:51,664 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:25:51,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 269 events. 142/269 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 976 event pairs, 99 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 572. Up to 241 conditions per place. [2023-08-30 07:25:51,666 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 34 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-08-30 07:25:51,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 208 flow [2023-08-30 07:25:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:25:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:25:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-30 07:25:51,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43470149253731344 [2023-08-30 07:25:51,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-30 07:25:51,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-30 07:25:51,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:51,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-30 07:25:51,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:51,672 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 104 flow. Second operand 4 states and 466 transitions. [2023-08-30 07:25:51,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 208 flow [2023-08-30 07:25:51,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:25:51,674 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 133 flow [2023-08-30 07:25:51,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2023-08-30 07:25:51,674 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-30 07:25:51,675 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 133 flow [2023-08-30 07:25:51,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 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 07:25:51,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:51,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:25:51,688 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 07:25:51,884 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 07:25:51,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:51,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 538927055, now seen corresponding path program 1 times [2023-08-30 07:25:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:51,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424938376] [2023-08-30 07:25:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:51,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:51,887 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 07:25:51,889 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 07:25:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:25:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:52,015 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:25:52,015 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 07:25:52,128 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 07:25:52,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:25:52,949 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 07:25:52,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:52,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424938376] [2023-08-30 07:25:52,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424938376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:25:52,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:25:52,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:25:52,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168033127] [2023-08-30 07:25:52,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:25:52,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:25:52,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:25:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:25:54,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 268 [2023-08-30 07:25:54,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 27 transitions, 133 flow. Second operand has 8 states, 8 states have (on average 99.25) internal successors, (794), 8 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:54,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:54,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 268 [2023-08-30 07:25:54,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:57,548 INFO L130 PetriNetUnfolder]: 156/298 cut-off events. [2023-08-30 07:25:57,548 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 07:25:57,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 298 events. 156/298 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1045 event pairs, 102 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 763. Up to 125 conditions per place. [2023-08-30 07:25:57,550 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 55 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-08-30 07:25:57,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 377 flow [2023-08-30 07:25:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:25:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:25:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1050 transitions. [2023-08-30 07:25:57,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917910447761194 [2023-08-30 07:25:57,554 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1050 transitions. [2023-08-30 07:25:57,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1050 transitions. [2023-08-30 07:25:57,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:57,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1050 transitions. [2023-08-30 07:25:57,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:57,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:57,561 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:57,561 INFO L175 Difference]: Start difference. First operand has 40 places, 27 transitions, 133 flow. Second operand 10 states and 1050 transitions. [2023-08-30 07:25:57,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 377 flow [2023-08-30 07:25:57,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 367 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:25:57,565 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 164 flow [2023-08-30 07:25:57,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=164, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-08-30 07:25:57,566 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-08-30 07:25:57,566 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 164 flow [2023-08-30 07:25:57,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.25) internal successors, (794), 8 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:57,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:57,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:25:57,579 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 07:25:57,776 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 07:25:57,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:57,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 538927056, now seen corresponding path program 1 times [2023-08-30 07:25:57,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:57,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032244276] [2023-08-30 07:25:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:25:57,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:57,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:57,780 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 07:25:57,817 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 07:25:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:25:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:25:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:57,884 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:25:57,885 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 07:25:57,905 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 07:25:57,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:25:57,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032244276] [2023-08-30 07:25:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032244276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:25:57,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:25:57,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:25:57,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170551090] [2023-08-30 07:25:57,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:25:57,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:25:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:25:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:25:57,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 268 [2023-08-30 07:25:57,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:57,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:25:57,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 268 [2023-08-30 07:25:57,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:25:58,089 INFO L130 PetriNetUnfolder]: 93/189 cut-off events. [2023-08-30 07:25:58,089 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 07:25:58,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 189 events. 93/189 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 561 event pairs, 51 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 512. Up to 182 conditions per place. [2023-08-30 07:25:58,091 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 20 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-30 07:25:58,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 26 transitions, 208 flow [2023-08-30 07:25:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:25:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:25:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-08-30 07:25:58,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41044776119402987 [2023-08-30 07:25:58,093 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-08-30 07:25:58,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-08-30 07:25:58,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:25:58,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-08-30 07:25:58,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:58,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:58,097 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:58,097 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 164 flow. Second operand 4 states and 440 transitions. [2023-08-30 07:25:58,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 26 transitions, 208 flow [2023-08-30 07:25:58,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 26 transitions, 158 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-30 07:25:58,098 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 118 flow [2023-08-30 07:25:58,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-08-30 07:25:58,099 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-30 07:25:58,099 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 118 flow [2023-08-30 07:25:58,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:25:58,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:25:58,100 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:25:58,115 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 07:25:58,309 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 07:25:58,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:25:58,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:25:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash -472851024, now seen corresponding path program 2 times [2023-08-30 07:25:58,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:25:58,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777876735] [2023-08-30 07:25:58,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:25:58,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:25:58,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:25:58,311 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 07:25:58,312 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 07:25:58,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:25:58,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:25:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:25:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:25:58,450 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:25:58,450 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 07:25:58,588 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 07:25:58,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:25:59,137 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 07:25:59,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:25:59,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777876735] [2023-08-30 07:25:59,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777876735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:25:59,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:25:59,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:25:59,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999222333] [2023-08-30 07:25:59,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:25:59,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:25:59,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:25:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:25:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:26:01,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-08-30 07:26:01,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:01,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:01,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-08-30 07:26:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:03,809 INFO L130 PetriNetUnfolder]: 314/600 cut-off events. [2023-08-30 07:26:03,809 INFO L131 PetriNetUnfolder]: For 579/579 co-relation queries the response was YES. [2023-08-30 07:26:03,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1712 conditions, 600 events. 314/600 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2467 event pairs, 180 based on Foata normal form. 6/606 useless extension candidates. Maximal degree in co-relation 1694. Up to 229 conditions per place. [2023-08-30 07:26:03,812 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 142 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2023-08-30 07:26:03,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 154 transitions, 864 flow [2023-08-30 07:26:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:26:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:26:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1396 transitions. [2023-08-30 07:26:03,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43407960199004975 [2023-08-30 07:26:03,826 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1396 transitions. [2023-08-30 07:26:03,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1396 transitions. [2023-08-30 07:26:03,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:03,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1396 transitions. [2023-08-30 07:26:03,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.33333333333333) internal successors, (1396), 12 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:03,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:03,836 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:03,836 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 118 flow. Second operand 12 states and 1396 transitions. [2023-08-30 07:26:03,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 154 transitions, 864 flow [2023-08-30 07:26:03,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 154 transitions, 851 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:26:03,842 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 209 flow [2023-08-30 07:26:03,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=209, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-08-30 07:26:03,842 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-08-30 07:26:03,843 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 209 flow [2023-08-30 07:26:03,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:03,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:03,844 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 07:26:03,855 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 07:26:04,052 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 07:26:04,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:04,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:04,053 INFO L85 PathProgramCache]: Analyzing trace with hash 856746578, now seen corresponding path program 2 times [2023-08-30 07:26:04,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:04,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162326600] [2023-08-30 07:26:04,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:26:04,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:04,055 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 07:26:04,056 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 07:26:04,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:26:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:26:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:26:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:04,180 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:26:04,181 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 07:26:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:26:04,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:26:04,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:04,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162326600] [2023-08-30 07:26:04,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162326600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:26:04,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:26:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:26:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317060205] [2023-08-30 07:26:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:26:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:26:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:26:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:26:04,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-08-30 07:26:04,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:04,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:04,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-08-30 07:26:04,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:04,562 INFO L130 PetriNetUnfolder]: 200/402 cut-off events. [2023-08-30 07:26:04,562 INFO L131 PetriNetUnfolder]: For 486/486 co-relation queries the response was YES. [2023-08-30 07:26:04,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 402 events. 200/402 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1496 event pairs, 90 based on Foata normal form. 72/474 useless extension candidates. Maximal degree in co-relation 1011. Up to 389 conditions per place. [2023-08-30 07:26:04,565 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 24 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-08-30 07:26:04,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 31 transitions, 255 flow [2023-08-30 07:26:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:26:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:26:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2023-08-30 07:26:04,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048507462686567 [2023-08-30 07:26:04,567 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2023-08-30 07:26:04,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2023-08-30 07:26:04,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:04,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2023-08-30 07:26:04,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:04,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:04,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:04,570 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 209 flow. Second operand 4 states and 434 transitions. [2023-08-30 07:26:04,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 31 transitions, 255 flow [2023-08-30 07:26:04,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 31 transitions, 230 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-30 07:26:04,573 INFO L231 Difference]: Finished difference. Result has 52 places, 31 transitions, 182 flow [2023-08-30 07:26:04,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=52, PETRI_TRANSITIONS=31} [2023-08-30 07:26:04,574 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-30 07:26:04,574 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 31 transitions, 182 flow [2023-08-30 07:26:04,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:04,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:04,575 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:26:04,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:04,783 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 07:26:04,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:04,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 23278736, now seen corresponding path program 3 times [2023-08-30 07:26:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549485779] [2023-08-30 07:26:04,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:26:04,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:04,787 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 07:26:04,790 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 07:26:04,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:26:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:26:04,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:26:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:05,047 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:26:05,047 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 07:26:05,383 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 07:26:05,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:07,590 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 07:26:07,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549485779] [2023-08-30 07:26:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549485779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:07,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:07,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:26:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027462629] [2023-08-30 07:26:07,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:07,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:26:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:26:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:26:15,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-08-30 07:26:15,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 31 transitions, 182 flow. Second operand has 24 states, 24 states have (on average 104.0) internal successors, (2496), 24 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:15,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:15,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-08-30 07:26:15,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:30,135 INFO L130 PetriNetUnfolder]: 452/894 cut-off events. [2023-08-30 07:26:30,135 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-08-30 07:26:30,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 894 events. 452/894 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3588 event pairs, 198 based on Foata normal form. 12/906 useless extension candidates. Maximal degree in co-relation 2260. Up to 253 conditions per place. [2023-08-30 07:26:30,139 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 286 selfloop transitions, 24 changer transitions 0/310 dead transitions. [2023-08-30 07:26:30,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 310 transitions, 1732 flow [2023-08-30 07:26:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:26:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:26:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2794 transitions. [2023-08-30 07:26:30,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343905472636816 [2023-08-30 07:26:30,166 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2794 transitions. [2023-08-30 07:26:30,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2794 transitions. [2023-08-30 07:26:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2794 transitions. [2023-08-30 07:26:30,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 116.41666666666667) internal successors, (2794), 24 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 268.0) internal successors, (6700), 25 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,183 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 268.0) internal successors, (6700), 25 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,183 INFO L175 Difference]: Start difference. First operand has 52 places, 31 transitions, 182 flow. Second operand 24 states and 2794 transitions. [2023-08-30 07:26:30,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 310 transitions, 1732 flow [2023-08-30 07:26:30,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 310 transitions, 1707 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:26:30,191 INFO L231 Difference]: Finished difference. Result has 86 places, 44 transitions, 361 flow [2023-08-30 07:26:30,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=44} [2023-08-30 07:26:30,192 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-08-30 07:26:30,193 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 44 transitions, 361 flow [2023-08-30 07:26:30,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.0) internal successors, (2496), 24 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:30,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:30,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:30,405 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 07:26:30,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:30,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash -235118424, now seen corresponding path program 1 times [2023-08-30 07:26:30,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:30,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316490697] [2023-08-30 07:26:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:30,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:30,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:30,408 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 07:26:30,409 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 07:26:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:30,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:26:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:30,494 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 07:26:30,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:26:30,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:30,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316490697] [2023-08-30 07:26:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316490697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:26:30,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:26:30,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:26:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897411244] [2023-08-30 07:26:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:26:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:26:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:26:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:26:30,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 268 [2023-08-30 07:26:30,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 44 transitions, 361 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:30,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 268 [2023-08-30 07:26:30,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:30,751 INFO L130 PetriNetUnfolder]: 788/1502 cut-off events. [2023-08-30 07:26:30,751 INFO L131 PetriNetUnfolder]: For 505/505 co-relation queries the response was YES. [2023-08-30 07:26:30,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 1502 events. 788/1502 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6956 event pairs, 198 based on Foata normal form. 22/1524 useless extension candidates. Maximal degree in co-relation 3747. Up to 757 conditions per place. [2023-08-30 07:26:30,760 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 47 selfloop transitions, 2 changer transitions 3/52 dead transitions. [2023-08-30 07:26:30,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 52 transitions, 487 flow [2023-08-30 07:26:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:26:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:26:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-08-30 07:26:30,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44527363184079605 [2023-08-30 07:26:30,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-08-30 07:26:30,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-08-30 07:26:30,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:30,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-08-30 07:26:30,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,766 INFO L175 Difference]: Start difference. First operand has 86 places, 44 transitions, 361 flow. Second operand 3 states and 358 transitions. [2023-08-30 07:26:30,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 52 transitions, 487 flow [2023-08-30 07:26:30,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 439 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 07:26:30,771 INFO L231 Difference]: Finished difference. Result has 79 places, 44 transitions, 319 flow [2023-08-30 07:26:30,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=79, PETRI_TRANSITIONS=44} [2023-08-30 07:26:30,772 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-08-30 07:26:30,772 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 44 transitions, 319 flow [2023-08-30 07:26:30,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:30,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:30,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:30,787 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 07:26:30,982 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 07:26:30,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:30,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:30,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1873389343, now seen corresponding path program 1 times [2023-08-30 07:26:30,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:30,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4853940] [2023-08-30 07:26:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:30,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:30,985 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 07:26:30,988 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 07:26:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:31,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:26:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:26:31,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:26:31,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:31,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4853940] [2023-08-30 07:26:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4853940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:26:31,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:26:31,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:26:31,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391958053] [2023-08-30 07:26:31,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:26:31,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:26:31,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:26:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:26:31,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 268 [2023-08-30 07:26:31,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 44 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:31,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:31,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 268 [2023-08-30 07:26:31,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:31,431 INFO L130 PetriNetUnfolder]: 1023/2027 cut-off events. [2023-08-30 07:26:31,431 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-08-30 07:26:31,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 2027 events. 1023/2027 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10933 event pairs, 340 based on Foata normal form. 120/2147 useless extension candidates. Maximal degree in co-relation 5270. Up to 1461 conditions per place. [2023-08-30 07:26:31,441 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 46 selfloop transitions, 2 changer transitions 5/53 dead transitions. [2023-08-30 07:26:31,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 53 transitions, 448 flow [2023-08-30 07:26:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:26:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:26:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-30 07:26:31,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43905472636815923 [2023-08-30 07:26:31,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-30 07:26:31,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-30 07:26:31,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:31,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-30 07:26:31,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:31,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:31,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:31,448 INFO L175 Difference]: Start difference. First operand has 79 places, 44 transitions, 319 flow. Second operand 3 states and 353 transitions. [2023-08-30 07:26:31,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 53 transitions, 448 flow [2023-08-30 07:26:31,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 53 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:26:31,457 INFO L231 Difference]: Finished difference. Result has 79 places, 45 transitions, 331 flow [2023-08-30 07:26:31,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=79, PETRI_TRANSITIONS=45} [2023-08-30 07:26:31,458 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-08-30 07:26:31,458 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 45 transitions, 331 flow [2023-08-30 07:26:31,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:31,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:31,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:31,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:31,667 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 07:26:31,668 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:31,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash 289744, now seen corresponding path program 1 times [2023-08-30 07:26:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:31,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586020362] [2023-08-30 07:26:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:26:31,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:31,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:31,670 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 07:26:31,673 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 07:26:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:26:31,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:31,839 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 07:26:31,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:31,941 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 07:26:31,941 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 07:26:31,979 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 07:26:31,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586020362] [2023-08-30 07:26:31,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586020362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:31,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:31,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2023-08-30 07:26:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459254973] [2023-08-30 07:26:31,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:26:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:26:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:26:32,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:26:32,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 45 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:32,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:32,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:26:32,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:32,928 INFO L130 PetriNetUnfolder]: 1703/3267 cut-off events. [2023-08-30 07:26:32,928 INFO L131 PetriNetUnfolder]: For 2309/2309 co-relation queries the response was YES. [2023-08-30 07:26:32,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 3267 events. 1703/3267 cut-off events. For 2309/2309 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 19471 event pairs, 260 based on Foata normal form. 20/3287 useless extension candidates. Maximal degree in co-relation 9190. Up to 1160 conditions per place. [2023-08-30 07:26:32,945 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 55 selfloop transitions, 6 changer transitions 9/70 dead transitions. [2023-08-30 07:26:32,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 547 flow [2023-08-30 07:26:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:26:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:26:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-30 07:26:32,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126865671641791 [2023-08-30 07:26:32,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-30 07:26:32,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-30 07:26:32,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:32,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-30 07:26:32,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:32,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:32,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:32,954 INFO L175 Difference]: Start difference. First operand has 79 places, 45 transitions, 331 flow. Second operand 5 states and 553 transitions. [2023-08-30 07:26:32,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 547 flow [2023-08-30 07:26:32,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 543 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 07:26:32,959 INFO L231 Difference]: Finished difference. Result has 84 places, 48 transitions, 368 flow [2023-08-30 07:26:32,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=84, PETRI_TRANSITIONS=48} [2023-08-30 07:26:32,961 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 50 predicate places. [2023-08-30 07:26:32,961 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 48 transitions, 368 flow [2023-08-30 07:26:32,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:32,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:32,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:32,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:33,172 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 07:26:33,173 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:33,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1604271614, now seen corresponding path program 2 times [2023-08-30 07:26:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32184373] [2023-08-30 07:26:33,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:26:33,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:33,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:33,175 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 07:26:33,178 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 07:26:33,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:26:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:26:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:26:33,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:33,316 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 39 treesize of output 37 [2023-08-30 07:26:33,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 47 [2023-08-30 07:26:33,503 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 07:26:33,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:33,725 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:26:33,726 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 73 [2023-08-30 07:26:33,926 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 07:26:33,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:33,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32184373] [2023-08-30 07:26:33,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32184373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:33,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:33,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-08-30 07:26:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566823040] [2023-08-30 07:26:33,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:26:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:26:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:26:34,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 07:26:34,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 48 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:34,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:34,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 07:26:34,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:35,104 INFO L130 PetriNetUnfolder]: 2023/3847 cut-off events. [2023-08-30 07:26:35,104 INFO L131 PetriNetUnfolder]: For 4289/4289 co-relation queries the response was YES. [2023-08-30 07:26:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11774 conditions, 3847 events. 2023/3847 cut-off events. For 4289/4289 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 23418 event pairs, 360 based on Foata normal form. 20/3867 useless extension candidates. Maximal degree in co-relation 11730. Up to 1280 conditions per place. [2023-08-30 07:26:35,122 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 55 selfloop transitions, 6 changer transitions 9/70 dead transitions. [2023-08-30 07:26:35,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 573 flow [2023-08-30 07:26:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:26:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:26:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 527 transitions. [2023-08-30 07:26:35,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932835820895522 [2023-08-30 07:26:35,126 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 527 transitions. [2023-08-30 07:26:35,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 527 transitions. [2023-08-30 07:26:35,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:35,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 527 transitions. [2023-08-30 07:26:35,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:35,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:35,130 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:35,130 INFO L175 Difference]: Start difference. First operand has 84 places, 48 transitions, 368 flow. Second operand 5 states and 527 transitions. [2023-08-30 07:26:35,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 573 flow [2023-08-30 07:26:35,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 70 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:26:35,145 INFO L231 Difference]: Finished difference. Result has 87 places, 49 transitions, 391 flow [2023-08-30 07:26:35,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=391, PETRI_PLACES=87, PETRI_TRANSITIONS=49} [2023-08-30 07:26:35,146 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 53 predicate places. [2023-08-30 07:26:35,146 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 49 transitions, 391 flow [2023-08-30 07:26:35,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:35,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:35,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:35,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:35,357 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 07:26:35,357 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:35,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1614039090, now seen corresponding path program 3 times [2023-08-30 07:26:35,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:35,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063991016] [2023-08-30 07:26:35,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:26:35,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:35,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:35,359 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 07:26:35,361 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 07:26:35,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:26:35,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:26:35,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:26:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:35,555 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:26:35,556 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 07:26:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:26:35,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:26:36,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:36,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063991016] [2023-08-30 07:26:36,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063991016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:36,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:36,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 07:26:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511641099] [2023-08-30 07:26:36,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:36,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:26:36,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:36,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:26:36,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:26:37,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-08-30 07:26:37,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 49 transitions, 391 flow. Second operand has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:37,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:37,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-08-30 07:26:37,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:38,911 INFO L130 PetriNetUnfolder]: 1995/3805 cut-off events. [2023-08-30 07:26:38,911 INFO L131 PetriNetUnfolder]: For 7382/7382 co-relation queries the response was YES. [2023-08-30 07:26:38,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12336 conditions, 3805 events. 1995/3805 cut-off events. For 7382/7382 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 22960 event pairs, 588 based on Foata normal form. 12/3817 useless extension candidates. Maximal degree in co-relation 12291. Up to 1923 conditions per place. [2023-08-30 07:26:38,926 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 42 selfloop transitions, 11 changer transitions 31/84 dead transitions. [2023-08-30 07:26:38,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 84 transitions, 688 flow [2023-08-30 07:26:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:26:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:26:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 901 transitions. [2023-08-30 07:26:38,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37354892205638474 [2023-08-30 07:26:38,930 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 901 transitions. [2023-08-30 07:26:38,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 901 transitions. [2023-08-30 07:26:38,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:38,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 901 transitions. [2023-08-30 07:26:38,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.11111111111111) internal successors, (901), 9 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:38,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:38,935 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:38,935 INFO L175 Difference]: Start difference. First operand has 87 places, 49 transitions, 391 flow. Second operand 9 states and 901 transitions. [2023-08-30 07:26:38,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 84 transitions, 688 flow [2023-08-30 07:26:38,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 673 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 07:26:38,954 INFO L231 Difference]: Finished difference. Result has 94 places, 48 transitions, 401 flow [2023-08-30 07:26:38,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=401, PETRI_PLACES=94, PETRI_TRANSITIONS=48} [2023-08-30 07:26:38,954 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 60 predicate places. [2023-08-30 07:26:38,955 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 48 transitions, 401 flow [2023-08-30 07:26:38,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:38,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:38,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:38,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 07:26:39,165 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 07:26:39,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:39,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:39,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1259228725, now seen corresponding path program 4 times [2023-08-30 07:26:39,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:39,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895809103] [2023-08-30 07:26:39,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:26:39,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:39,168 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 07:26:39,171 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 07:26:39,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:26:39,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:26:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:26:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:39,345 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:26:39,345 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 07:26:39,421 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 13 treesize of output 9 [2023-08-30 07:26:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:26:39,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:26:40,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895809103] [2023-08-30 07:26:40,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895809103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:40,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:40,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 07:26:40,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776904346] [2023-08-30 07:26:40,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:40,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:26:40,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:26:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:26:41,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 07:26:41,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 48 transitions, 401 flow. Second operand has 14 states, 14 states have (on average 99.21428571428571) internal successors, (1389), 14 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:41,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:41,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 07:26:41,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:43,291 INFO L130 PetriNetUnfolder]: 4330/8394 cut-off events. [2023-08-30 07:26:43,292 INFO L131 PetriNetUnfolder]: For 19554/19554 co-relation queries the response was YES. [2023-08-30 07:26:43,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26407 conditions, 8394 events. 4330/8394 cut-off events. For 19554/19554 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 61824 event pairs, 1285 based on Foata normal form. 372/8766 useless extension candidates. Maximal degree in co-relation 26361. Up to 3440 conditions per place. [2023-08-30 07:26:43,329 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 94 selfloop transitions, 22 changer transitions 10/126 dead transitions. [2023-08-30 07:26:43,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 1050 flow [2023-08-30 07:26:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:26:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:26:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1255 transitions. [2023-08-30 07:26:43,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902363184079602 [2023-08-30 07:26:43,334 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1255 transitions. [2023-08-30 07:26:43,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1255 transitions. [2023-08-30 07:26:43,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:43,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1255 transitions. [2023-08-30 07:26:43,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:43,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:43,340 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:43,340 INFO L175 Difference]: Start difference. First operand has 94 places, 48 transitions, 401 flow. Second operand 12 states and 1255 transitions. [2023-08-30 07:26:43,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 1050 flow [2023-08-30 07:26:43,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 126 transitions, 997 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-30 07:26:43,459 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 624 flow [2023-08-30 07:26:43,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=624, PETRI_PLACES=100, PETRI_TRANSITIONS=64} [2023-08-30 07:26:43,459 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 66 predicate places. [2023-08-30 07:26:43,460 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 624 flow [2023-08-30 07:26:43,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 99.21428571428571) internal successors, (1389), 14 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:43,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:43,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:43,473 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 07:26:43,671 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 07:26:43,671 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:43,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash -517506536, now seen corresponding path program 5 times [2023-08-30 07:26:43,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:43,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981627488] [2023-08-30 07:26:43,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:26:43,672 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 07:26:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:43,673 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 07:26:43,674 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 07:26:43,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:26:43,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:26:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:26:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:26:43,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:44,016 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:26:44,016 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 07:26:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:26:44,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981627488] [2023-08-30 07:26:44,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981627488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:44,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:44,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-08-30 07:26:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814117372] [2023-08-30 07:26:44,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:26:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:26:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:26:44,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:26:44,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 64 transitions, 624 flow. Second operand has 9 states, 9 states have (on average 104.88888888888889) internal successors, (944), 9 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:44,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:44,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:26:44,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:46,431 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 07:26:48,692 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 07:26:50,326 INFO L130 PetriNetUnfolder]: 6732/12821 cut-off events. [2023-08-30 07:26:50,326 INFO L131 PetriNetUnfolder]: For 40321/40321 co-relation queries the response was YES. [2023-08-30 07:26:50,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47795 conditions, 12821 events. 6732/12821 cut-off events. For 40321/40321 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 98770 event pairs, 642 based on Foata normal form. 22/12843 useless extension candidates. Maximal degree in co-relation 47746. Up to 3833 conditions per place. [2023-08-30 07:26:50,391 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 101 selfloop transitions, 35 changer transitions 14/150 dead transitions. [2023-08-30 07:26:50,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1449 flow [2023-08-30 07:26:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:26:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:26:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-30 07:26:50,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-08-30 07:26:50,394 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-30 07:26:50,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-30 07:26:50,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:50,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-30 07:26:50,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:50,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:50,399 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:50,399 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 624 flow. Second operand 10 states and 1108 transitions. [2023-08-30 07:26:50,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1449 flow [2023-08-30 07:26:50,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1352 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-08-30 07:26:50,622 INFO L231 Difference]: Finished difference. Result has 111 places, 83 transitions, 943 flow [2023-08-30 07:26:50,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=943, PETRI_PLACES=111, PETRI_TRANSITIONS=83} [2023-08-30 07:26:50,622 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-08-30 07:26:50,623 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 83 transitions, 943 flow [2023-08-30 07:26:50,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.88888888888889) internal successors, (944), 9 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:50,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:50,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:50,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:50,833 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 07:26:50,834 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:50,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash 325092292, now seen corresponding path program 6 times [2023-08-30 07:26:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:50,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992628580] [2023-08-30 07:26:50,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:26:50,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:50,835 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 07:26:50,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:26:50,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:26:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:26:50,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:26:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 07:26:51,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:51,214 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 07:26:51,214 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 07:26:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 07:26:51,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992628580] [2023-08-30 07:26:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992628580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:51,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:51,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 07:26:51,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132287951] [2023-08-30 07:26:51,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:51,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:26:51,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:26:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:26:51,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:26:51,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 83 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:51,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:51,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:26:51,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:53,466 INFO L130 PetriNetUnfolder]: 6732/12743 cut-off events. [2023-08-30 07:26:53,466 INFO L131 PetriNetUnfolder]: For 49146/49146 co-relation queries the response was YES. [2023-08-30 07:26:53,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50165 conditions, 12743 events. 6732/12743 cut-off events. For 49146/49146 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 97346 event pairs, 702 based on Foata normal form. 78/12821 useless extension candidates. Maximal degree in co-relation 50110. Up to 3043 conditions per place. [2023-08-30 07:26:53,554 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 80 selfloop transitions, 30 changer transitions 38/148 dead transitions. [2023-08-30 07:26:53,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 148 transitions, 1481 flow [2023-08-30 07:26:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:26:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:26:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-30 07:26:53,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-08-30 07:26:53,559 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-30 07:26:53,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-30 07:26:53,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:26:53,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-30 07:26:53,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:53,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:53,564 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:53,564 INFO L175 Difference]: Start difference. First operand has 111 places, 83 transitions, 943 flow. Second operand 10 states and 1108 transitions. [2023-08-30 07:26:53,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 148 transitions, 1481 flow [2023-08-30 07:26:54,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1391 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-30 07:26:54,006 INFO L231 Difference]: Finished difference. Result has 120 places, 81 transitions, 928 flow [2023-08-30 07:26:54,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=928, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2023-08-30 07:26:54,007 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 86 predicate places. [2023-08-30 07:26:54,007 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 928 flow [2023-08-30 07:26:54,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:54,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:26:54,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:26:54,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:26:54,218 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 07:26:54,218 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:26:54,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:26:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1100956100, now seen corresponding path program 7 times [2023-08-30 07:26:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:26:54,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217940177] [2023-08-30 07:26:54,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:26:54,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:26:54,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:26:54,220 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 07:26:54,221 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 07:26:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:26:54,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:26:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:26:54,394 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 07:26:54,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2023-08-30 07:26:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:26:54,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:26:54,861 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-08-30 07:26:54,861 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 81 [2023-08-30 07:26:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:26:55,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:26:55,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217940177] [2023-08-30 07:26:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217940177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:26:55,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:26:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-08-30 07:26:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706624671] [2023-08-30 07:26:55,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:26:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:26:55,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:26:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:26:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:26:55,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 07:26:55,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 928 flow. Second operand has 12 states, 12 states have (on average 98.91666666666667) internal successors, (1187), 12 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:26:55,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:26:55,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 07:26:55,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:26:58,024 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 07:27:00,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:27:01,898 INFO L130 PetriNetUnfolder]: 7000/13219 cut-off events. [2023-08-30 07:27:01,898 INFO L131 PetriNetUnfolder]: For 53228/53228 co-relation queries the response was YES. [2023-08-30 07:27:01,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52462 conditions, 13219 events. 7000/13219 cut-off events. For 53228/53228 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 101038 event pairs, 742 based on Foata normal form. 22/13241 useless extension candidates. Maximal degree in co-relation 52405. Up to 2675 conditions per place. [2023-08-30 07:27:01,961 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 81 selfloop transitions, 36 changer transitions 28/145 dead transitions. [2023-08-30 07:27:01,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 145 transitions, 1472 flow [2023-08-30 07:27:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:27:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:27:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1053 transitions. [2023-08-30 07:27:01,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39291044776119405 [2023-08-30 07:27:01,964 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1053 transitions. [2023-08-30 07:27:01,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1053 transitions. [2023-08-30 07:27:01,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:01,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1053 transitions. [2023-08-30 07:27:01,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.3) internal successors, (1053), 10 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:01,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:01,968 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:01,968 INFO L175 Difference]: Start difference. First operand has 120 places, 81 transitions, 928 flow. Second operand 10 states and 1053 transitions. [2023-08-30 07:27:01,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 145 transitions, 1472 flow [2023-08-30 07:27:02,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 145 transitions, 1449 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:27:02,127 INFO L231 Difference]: Finished difference. Result has 126 places, 83 transitions, 1024 flow [2023-08-30 07:27:02,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1024, PETRI_PLACES=126, PETRI_TRANSITIONS=83} [2023-08-30 07:27:02,127 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2023-08-30 07:27:02,128 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 83 transitions, 1024 flow [2023-08-30 07:27:02,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.91666666666667) internal successors, (1187), 12 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:02,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:02,128 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:02,137 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 07:27:02,330 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 07:27:02,330 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:27:02,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1667175346, now seen corresponding path program 8 times [2023-08-30 07:27:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:02,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414740074] [2023-08-30 07:27:02,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:27:02,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:02,332 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 07:27:02,333 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 07:27:02,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:27:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 07:27:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:02,552 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:27:02,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:27:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:27:03,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:27:04,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414740074] [2023-08-30 07:27:04,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414740074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:04,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:04,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-08-30 07:27:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552641928] [2023-08-30 07:27:04,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:04,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 07:27:04,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 07:27:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-30 07:27:07,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-08-30 07:27:07,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 83 transitions, 1024 flow. Second operand has 18 states, 18 states have (on average 95.94444444444444) internal successors, (1727), 18 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:07,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:07,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-08-30 07:27:07,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:10,892 INFO L130 PetriNetUnfolder]: 7058/13347 cut-off events. [2023-08-30 07:27:10,892 INFO L131 PetriNetUnfolder]: For 72113/72113 co-relation queries the response was YES. [2023-08-30 07:27:10,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54966 conditions, 13347 events. 7058/13347 cut-off events. For 72113/72113 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 102649 event pairs, 4702 based on Foata normal form. 36/13383 useless extension candidates. Maximal degree in co-relation 54908. Up to 12430 conditions per place. [2023-08-30 07:27:10,946 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 62 selfloop transitions, 5 changer transitions 64/131 dead transitions. [2023-08-30 07:27:10,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 131 transitions, 1535 flow [2023-08-30 07:27:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:27:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:27:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1099 transitions. [2023-08-30 07:27:10,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37279511533242876 [2023-08-30 07:27:10,949 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1099 transitions. [2023-08-30 07:27:10,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1099 transitions. [2023-08-30 07:27:10,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:10,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1099 transitions. [2023-08-30 07:27:10,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.9090909090909) internal successors, (1099), 11 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:10,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:10,952 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:10,953 INFO L175 Difference]: Start difference. First operand has 126 places, 83 transitions, 1024 flow. Second operand 11 states and 1099 transitions. [2023-08-30 07:27:10,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 131 transitions, 1535 flow [2023-08-30 07:27:11,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 131 transitions, 1479 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-30 07:27:11,118 INFO L231 Difference]: Finished difference. Result has 132 places, 67 transitions, 771 flow [2023-08-30 07:27:11,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=771, PETRI_PLACES=132, PETRI_TRANSITIONS=67} [2023-08-30 07:27:11,119 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 98 predicate places. [2023-08-30 07:27:11,119 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 67 transitions, 771 flow [2023-08-30 07:27:11,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.94444444444444) internal successors, (1727), 18 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:11,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:11,120 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:11,129 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 07:27:11,324 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 07:27:11,325 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:27:11,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:11,325 INFO L85 PathProgramCache]: Analyzing trace with hash -682567175, now seen corresponding path program 9 times [2023-08-30 07:27:11,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:11,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117749034] [2023-08-30 07:27:11,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:27:11,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:11,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:11,327 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 07:27:11,328 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 07:27:11,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:27:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:11,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:27:11,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:27:11,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:27:12,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:12,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117749034] [2023-08-30 07:27:12,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117749034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:12,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:12,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-08-30 07:27:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066866608] [2023-08-30 07:27:12,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:12,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:27:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:27:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:27:12,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 268 [2023-08-30 07:27:12,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 67 transitions, 771 flow. Second operand has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:12,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:12,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 268 [2023-08-30 07:27:12,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:15,771 INFO L130 PetriNetUnfolder]: 13397/25125 cut-off events. [2023-08-30 07:27:15,772 INFO L131 PetriNetUnfolder]: For 144611/144611 co-relation queries the response was YES. [2023-08-30 07:27:15,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100400 conditions, 25125 events. 13397/25125 cut-off events. For 144611/144611 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 214692 event pairs, 2622 based on Foata normal form. 342/25467 useless extension candidates. Maximal degree in co-relation 100339. Up to 8551 conditions per place. [2023-08-30 07:27:15,896 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 80 selfloop transitions, 36 changer transitions 5/121 dead transitions. [2023-08-30 07:27:15,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 121 transitions, 1541 flow [2023-08-30 07:27:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:27:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:27:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2023-08-30 07:27:15,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42661691542288555 [2023-08-30 07:27:15,898 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 686 transitions. [2023-08-30 07:27:15,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 686 transitions. [2023-08-30 07:27:15,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:15,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 686 transitions. [2023-08-30 07:27:15,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.33333333333333) internal successors, (686), 6 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:15,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:15,900 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:15,900 INFO L175 Difference]: Start difference. First operand has 132 places, 67 transitions, 771 flow. Second operand 6 states and 686 transitions. [2023-08-30 07:27:15,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 121 transitions, 1541 flow [2023-08-30 07:27:16,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 1342 flow, removed 69 selfloop flow, removed 13 redundant places. [2023-08-30 07:27:16,562 INFO L231 Difference]: Finished difference. Result has 117 places, 90 transitions, 1081 flow [2023-08-30 07:27:16,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1081, PETRI_PLACES=117, PETRI_TRANSITIONS=90} [2023-08-30 07:27:16,563 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 83 predicate places. [2023-08-30 07:27:16,563 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 90 transitions, 1081 flow [2023-08-30 07:27:16,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:16,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:16,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:16,574 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 07:27:16,771 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 07:27:16,772 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:27:16,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1396224912, now seen corresponding path program 10 times [2023-08-30 07:27:16,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611217326] [2023-08-30 07:27:16,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:27:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:16,774 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 07:27:16,775 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 07:27:16,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:27:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:27:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 07:27:17,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:17,107 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 07:27:17,107 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 07:27:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 07:27:17,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:17,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611217326] [2023-08-30 07:27:17,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611217326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:17,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:17,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-08-30 07:27:17,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565698735] [2023-08-30 07:27:17,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:27:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:27:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:27:17,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:27:17,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 90 transitions, 1081 flow. Second operand has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:17,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:17,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:27:17,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:22,207 INFO L130 PetriNetUnfolder]: 18147/33884 cut-off events. [2023-08-30 07:27:22,207 INFO L131 PetriNetUnfolder]: For 133230/133230 co-relation queries the response was YES. [2023-08-30 07:27:22,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134248 conditions, 33884 events. 18147/33884 cut-off events. For 133230/133230 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 298766 event pairs, 1159 based on Foata normal form. 133/34017 useless extension candidates. Maximal degree in co-relation 134194. Up to 9577 conditions per place. [2023-08-30 07:27:22,464 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 117 selfloop transitions, 69 changer transitions 20/206 dead transitions. [2023-08-30 07:27:22,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 206 transitions, 2144 flow [2023-08-30 07:27:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 07:27:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 07:27:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1670 transitions. [2023-08-30 07:27:22,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154228855721393 [2023-08-30 07:27:22,467 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1670 transitions. [2023-08-30 07:27:22,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1670 transitions. [2023-08-30 07:27:22,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:22,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1670 transitions. [2023-08-30 07:27:22,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.33333333333333) internal successors, (1670), 15 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:22,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:22,474 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:22,474 INFO L175 Difference]: Start difference. First operand has 117 places, 90 transitions, 1081 flow. Second operand 15 states and 1670 transitions. [2023-08-30 07:27:22,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 206 transitions, 2144 flow [2023-08-30 07:27:23,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 206 transitions, 2020 flow, removed 61 selfloop flow, removed 1 redundant places. [2023-08-30 07:27:23,488 INFO L231 Difference]: Finished difference. Result has 138 places, 113 transitions, 1504 flow [2023-08-30 07:27:23,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1504, PETRI_PLACES=138, PETRI_TRANSITIONS=113} [2023-08-30 07:27:23,489 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 104 predicate places. [2023-08-30 07:27:23,489 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 113 transitions, 1504 flow [2023-08-30 07:27:23,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:23,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:23,490 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:23,499 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 07:27:23,697 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 07:27:23,697 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:27:23,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1546134480, now seen corresponding path program 11 times [2023-08-30 07:27:23,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:23,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335154792] [2023-08-30 07:27:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:27:23,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:23,701 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 07:27:23,703 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 07:27:23,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:27:23,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:27:23,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:27:24,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:24,174 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:27:24,175 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 07:27:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:27:24,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:24,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335154792] [2023-08-30 07:27:24,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335154792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:24,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:24,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-08-30 07:27:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208070478] [2023-08-30 07:27:24,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:27:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:27:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:27:24,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:27:24,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 113 transitions, 1504 flow. Second operand has 12 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:24,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:24,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:27:24,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:26,977 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 07:27:29,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:27:31,395 WARN L539 Checker$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 07:27:33,480 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 07:27:39,403 INFO L130 PetriNetUnfolder]: 23049/42833 cut-off events. [2023-08-30 07:27:39,403 INFO L131 PetriNetUnfolder]: For 223613/223613 co-relation queries the response was YES. [2023-08-30 07:27:39,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173663 conditions, 42833 events. 23049/42833 cut-off events. For 223613/223613 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 386956 event pairs, 1653 based on Foata normal form. 19/42852 useless extension candidates. Maximal degree in co-relation 173600. Up to 8778 conditions per place. [2023-08-30 07:27:39,783 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 106 selfloop transitions, 87 changer transitions 19/212 dead transitions. [2023-08-30 07:27:39,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 212 transitions, 2620 flow [2023-08-30 07:27:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 07:27:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 07:27:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1442 transitions. [2023-08-30 07:27:39,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41389207807118256 [2023-08-30 07:27:39,785 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1442 transitions. [2023-08-30 07:27:39,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1442 transitions. [2023-08-30 07:27:39,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:39,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1442 transitions. [2023-08-30 07:27:39,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.92307692307692) internal successors, (1442), 13 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:39,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:39,789 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:39,790 INFO L175 Difference]: Start difference. First operand has 138 places, 113 transitions, 1504 flow. Second operand 13 states and 1442 transitions. [2023-08-30 07:27:39,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 212 transitions, 2620 flow [2023-08-30 07:27:41,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 212 transitions, 2435 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-08-30 07:27:41,896 INFO L231 Difference]: Finished difference. Result has 146 places, 131 transitions, 1813 flow [2023-08-30 07:27:41,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1813, PETRI_PLACES=146, PETRI_TRANSITIONS=131} [2023-08-30 07:27:41,897 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 112 predicate places. [2023-08-30 07:27:41,897 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 131 transitions, 1813 flow [2023-08-30 07:27:41,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:41,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:41,898 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:41,907 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 (27)] Ended with exit code 0 [2023-08-30 07:27:42,099 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 07:27:42,099 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:27:42,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1159581924, now seen corresponding path program 12 times [2023-08-30 07:27:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:42,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76801223] [2023-08-30 07:27:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:27:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:42,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:42,101 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 07:27:42,103 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 07:27:42,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:27:42,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:27:42,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 07:27:42,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:42,479 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:27:42,480 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 07:27:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 07:27:42,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76801223] [2023-08-30 07:27:42,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76801223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:42,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:42,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-08-30 07:27:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875664899] [2023-08-30 07:27:42,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:42,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:27:42,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:27:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:27:43,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:27:43,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 131 transitions, 1813 flow. Second operand has 11 states, 11 states have (on average 104.72727272727273) internal successors, (1152), 11 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:43,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:43,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:27:43,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:45,125 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 07:27:47,522 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 07:27:53,767 INFO L130 PetriNetUnfolder]: 23049/42662 cut-off events. [2023-08-30 07:27:53,767 INFO L131 PetriNetUnfolder]: For 217913/217913 co-relation queries the response was YES. [2023-08-30 07:27:54,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171706 conditions, 42662 events. 23049/42662 cut-off events. For 217913/217913 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 384614 event pairs, 1482 based on Foata normal form. 171/42833 useless extension candidates. Maximal degree in co-relation 171643. Up to 8778 conditions per place. [2023-08-30 07:27:54,121 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 97 selfloop transitions, 93 changer transitions 69/259 dead transitions. [2023-08-30 07:27:54,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 259 transitions, 2714 flow [2023-08-30 07:27:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 07:27:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 07:27:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2215 transitions. [2023-08-30 07:27:54,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41324626865671643 [2023-08-30 07:27:54,124 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2215 transitions. [2023-08-30 07:27:54,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2215 transitions. [2023-08-30 07:27:54,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:54,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2215 transitions. [2023-08-30 07:27:54,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.75) internal successors, (2215), 20 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:54,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:54,130 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:54,131 INFO L175 Difference]: Start difference. First operand has 146 places, 131 transitions, 1813 flow. Second operand 20 states and 2215 transitions. [2023-08-30 07:27:54,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 259 transitions, 2714 flow [2023-08-30 07:27:56,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 259 transitions, 2609 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-08-30 07:27:56,307 INFO L231 Difference]: Finished difference. Result has 171 places, 139 transitions, 2049 flow [2023-08-30 07:27:56,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2049, PETRI_PLACES=171, PETRI_TRANSITIONS=139} [2023-08-30 07:27:56,308 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 137 predicate places. [2023-08-30 07:27:56,308 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 139 transitions, 2049 flow [2023-08-30 07:27:56,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.72727272727273) internal successors, (1152), 11 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:56,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:56,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 07:27:56,515 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 07:27:56,515 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:27:56,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash -577813634, now seen corresponding path program 13 times [2023-08-30 07:27:56,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:56,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751391929] [2023-08-30 07:27:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:27:56,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:56,517 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 07:27:56,518 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 07:27:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:27:56,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:27:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:56,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-30 07:27:56,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2023-08-30 07:27:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:27:57,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:57,052 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_750 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_750) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse1)))) (_ bv5 32))) is different from false [2023-08-30 07:27:57,165 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-08-30 07:27:57,166 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2023-08-30 07:27:57,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:27:57,171 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 37 treesize of output 9 [2023-08-30 07:27:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-08-30 07:27:57,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:57,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751391929] [2023-08-30 07:27:57,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751391929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:57,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:57,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-08-30 07:27:57,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885078263] [2023-08-30 07:27:57,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:57,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:27:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:27:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=179, Unknown=1, NotChecked=26, Total=240 [2023-08-30 07:27:57,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 07:27:57,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 139 transitions, 2049 flow. Second operand has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:57,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:57,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 07:27:57,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:59,921 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 07:28:02,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:28:04,445 WARN L539 Checker$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 07:28:06,597 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 07:28:12,916 INFO L130 PetriNetUnfolder]: 23353/43213 cut-off events. [2023-08-30 07:28:12,917 INFO L131 PetriNetUnfolder]: For 252569/252569 co-relation queries the response was YES. [2023-08-30 07:28:13,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182432 conditions, 43213 events. 23353/43213 cut-off events. For 252569/252569 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 388330 event pairs, 1748 based on Foata normal form. 19/43232 useless extension candidates. Maximal degree in co-relation 182359. Up to 8892 conditions per place. [2023-08-30 07:28:13,364 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 77 selfloop transitions, 97 changer transitions 40/214 dead transitions. [2023-08-30 07:28:13,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 214 transitions, 2696 flow [2023-08-30 07:28:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 07:28:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 07:28:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1201 transitions. [2023-08-30 07:28:13,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447187141216992 [2023-08-30 07:28:13,367 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1201 transitions. [2023-08-30 07:28:13,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1201 transitions. [2023-08-30 07:28:13,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:28:13,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1201 transitions. [2023-08-30 07:28:13,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 92.38461538461539) internal successors, (1201), 13 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:13,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:13,371 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:13,371 INFO L175 Difference]: Start difference. First operand has 171 places, 139 transitions, 2049 flow. Second operand 13 states and 1201 transitions. [2023-08-30 07:28:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 214 transitions, 2696 flow [2023-08-30 07:28:16,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 214 transitions, 2535 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-30 07:28:16,158 INFO L231 Difference]: Finished difference. Result has 178 places, 140 transitions, 2108 flow [2023-08-30 07:28:16,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2108, PETRI_PLACES=178, PETRI_TRANSITIONS=140} [2023-08-30 07:28:16,158 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 144 predicate places. [2023-08-30 07:28:16,159 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 140 transitions, 2108 flow [2023-08-30 07:28:16,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:16,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:28:16,159 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:28:16,169 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 07:28:16,363 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 07:28:16,363 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:28:16,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:28:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash 685549326, now seen corresponding path program 14 times [2023-08-30 07:28:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:28:16,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779551496] [2023-08-30 07:28:16,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:28:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:28:16,365 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 07:28:16,367 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 07:28:16,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:28:16,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:28:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 07:28:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:28:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:28:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:28:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:28:19,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:28:19,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779551496] [2023-08-30 07:28:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779551496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:28:19,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:28:19,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-08-30 07:28:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013914306] [2023-08-30 07:28:19,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:28:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:28:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:28:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:28:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:28:21,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 268 [2023-08-30 07:28:21,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 140 transitions, 2108 flow. Second operand has 24 states, 24 states have (on average 102.70833333333333) internal successors, (2465), 24 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:21,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:28:21,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 268 [2023-08-30 07:28:21,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:28:44,738 INFO L130 PetriNetUnfolder]: 40608/74980 cut-off events. [2023-08-30 07:28:44,738 INFO L131 PetriNetUnfolder]: For 556064/556064 co-relation queries the response was YES. [2023-08-30 07:28:45,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320361 conditions, 74980 events. 40608/74980 cut-off events. For 556064/556064 co-relation queries the response was YES. Maximal size of possible extension queue 1847. Compared 730796 event pairs, 6397 based on Foata normal form. 477/75457 useless extension candidates. Maximal degree in co-relation 320287. Up to 21259 conditions per place. [2023-08-30 07:28:45,510 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 105 selfloop transitions, 129 changer transitions 152/386 dead transitions. [2023-08-30 07:28:45,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 386 transitions, 6210 flow [2023-08-30 07:28:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 07:28:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 07:28:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1954 transitions. [2023-08-30 07:28:45,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050580431177446 [2023-08-30 07:28:45,515 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1954 transitions. [2023-08-30 07:28:45,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1954 transitions. [2023-08-30 07:28:45,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:28:45,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1954 transitions. [2023-08-30 07:28:45,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 108.55555555555556) internal successors, (1954), 18 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:45,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:45,520 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:45,520 INFO L175 Difference]: Start difference. First operand has 178 places, 140 transitions, 2108 flow. Second operand 18 states and 1954 transitions. [2023-08-30 07:28:45,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 386 transitions, 6210 flow [2023-08-30 07:28:50,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 386 transitions, 5806 flow, removed 32 selfloop flow, removed 9 redundant places. [2023-08-30 07:28:50,866 INFO L231 Difference]: Finished difference. Result has 188 places, 201 transitions, 3473 flow [2023-08-30 07:28:50,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3473, PETRI_PLACES=188, PETRI_TRANSITIONS=201} [2023-08-30 07:28:50,867 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 154 predicate places. [2023-08-30 07:28:50,867 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 201 transitions, 3473 flow [2023-08-30 07:28:50,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.70833333333333) internal successors, (2465), 24 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:50,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:28:50,868 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:28:50,877 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 07:28:51,073 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 07:28:51,073 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:28:51,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:28:51,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1774687592, now seen corresponding path program 15 times [2023-08-30 07:28:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:28:51,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345262439] [2023-08-30 07:28:51,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:28:51,075 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 07:28:51,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:28:51,076 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 07:28:51,079 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 07:28:51,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 07:28:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:28:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:28:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:28:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:28:51,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:28:51,607 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:28:51,610 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 07:28:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:28:51,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:28:51,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345262439] [2023-08-30 07:28:51,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345262439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:28:51,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:28:51,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-08-30 07:28:51,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218718779] [2023-08-30 07:28:51,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:28:51,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:28:51,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:28:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:28:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:28:52,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:28:52,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 201 transitions, 3473 flow. Second operand has 14 states, 14 states have (on average 104.28571428571429) internal successors, (1460), 14 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:52,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:28:52,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:28:52,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:28:54,861 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 07:28:56,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:28:59,393 WARN L539 Checker$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 07:29:01,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:29:04,149 WARN L539 Checker$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 07:29:07,545 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 07:29:28,987 INFO L130 PetriNetUnfolder]: 65360/120014 cut-off events. [2023-08-30 07:29:28,987 INFO L131 PetriNetUnfolder]: For 970953/970953 co-relation queries the response was YES. [2023-08-30 07:29:29,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533533 conditions, 120014 events. 65360/120014 cut-off events. For 970953/970953 co-relation queries the response was YES. Maximal size of possible extension queue 3035. Compared 1235479 event pairs, 3294 based on Foata normal form. 342/120356 useless extension candidates. Maximal degree in co-relation 533458. Up to 33229 conditions per place. [2023-08-30 07:29:30,193 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 256 selfloop transitions, 266 changer transitions 55/577 dead transitions. [2023-08-30 07:29:30,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 577 transitions, 8075 flow [2023-08-30 07:29:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 07:29:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 07:29:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4445 transitions. [2023-08-30 07:29:30,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146455223880597 [2023-08-30 07:29:30,200 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4445 transitions. [2023-08-30 07:29:30,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4445 transitions. [2023-08-30 07:29:30,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:29:30,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4445 transitions. [2023-08-30 07:29:30,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 111.125) internal successors, (4445), 40 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:30,379 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:30,379 INFO L175 Difference]: Start difference. First operand has 188 places, 201 transitions, 3473 flow. Second operand 40 states and 4445 transitions. [2023-08-30 07:29:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 577 transitions, 8075 flow [2023-08-30 07:29:49,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 577 transitions, 7631 flow, removed 218 selfloop flow, removed 5 redundant places. [2023-08-30 07:29:49,601 INFO L231 Difference]: Finished difference. Result has 233 places, 310 transitions, 5589 flow [2023-08-30 07:29:49,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5589, PETRI_PLACES=233, PETRI_TRANSITIONS=310} [2023-08-30 07:29:49,601 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 199 predicate places. [2023-08-30 07:29:49,601 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 310 transitions, 5589 flow [2023-08-30 07:29:49,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.28571428571429) internal successors, (1460), 14 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:49,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:29:49,602 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:29:49,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-08-30 07:29:49,813 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 07:29:49,813 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:29:49,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:29:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1896384868, now seen corresponding path program 16 times [2023-08-30 07:29:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:29:49,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230702620] [2023-08-30 07:29:49,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:29:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:29:49,815 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 07:29:49,816 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 07:29:49,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:29:49,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:29:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:29:49,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:29:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:29:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:29:50,201 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:29:50,201 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 07:29:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:29:50,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:29:50,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230702620] [2023-08-30 07:29:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230702620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:29:50,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:29:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-08-30 07:29:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951922300] [2023-08-30 07:29:50,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:29:50,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 07:29:50,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:29:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 07:29:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-08-30 07:29:50,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:29:50,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 310 transitions, 5589 flow. Second operand has 13 states, 13 states have (on average 104.61538461538461) internal successors, (1360), 13 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:50,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:29:50,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:29:50,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:29:52,950 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 07:29:55,648 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 07:30:24,827 INFO L130 PetriNetUnfolder]: 73604/134954 cut-off events. [2023-08-30 07:30:24,827 INFO L131 PetriNetUnfolder]: For 1583313/1583313 co-relation queries the response was YES. [2023-08-30 07:30:26,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607476 conditions, 134954 events. 73604/134954 cut-off events. For 1583313/1583313 co-relation queries the response was YES. Maximal size of possible extension queue 3397. Compared 1406265 event pairs, 4644 based on Foata normal form. 396/135350 useless extension candidates. Maximal degree in co-relation 607381. Up to 28243 conditions per place. [2023-08-30 07:30:26,621 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 198 selfloop transitions, 302 changer transitions 64/564 dead transitions. [2023-08-30 07:30:26,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 564 transitions, 9037 flow [2023-08-30 07:30:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 07:30:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 07:30:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3446 transitions. [2023-08-30 07:30:26,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41478093403948 [2023-08-30 07:30:26,627 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3446 transitions. [2023-08-30 07:30:26,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3446 transitions. [2023-08-30 07:30:26,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:26,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3446 transitions. [2023-08-30 07:30:26,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 111.16129032258064) internal successors, (3446), 31 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:26,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:26,637 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:26,637 INFO L175 Difference]: Start difference. First operand has 233 places, 310 transitions, 5589 flow. Second operand 31 states and 3446 transitions. [2023-08-30 07:30:26,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 564 transitions, 9037 flow [2023-08-30 07:30:46,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 564 transitions, 8207 flow, removed 166 selfloop flow, removed 4 redundant places. [2023-08-30 07:30:46,321 INFO L231 Difference]: Finished difference. Result has 274 places, 364 transitions, 6371 flow [2023-08-30 07:30:46,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6371, PETRI_PLACES=274, PETRI_TRANSITIONS=364} [2023-08-30 07:30:46,322 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 240 predicate places. [2023-08-30 07:30:46,322 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 364 transitions, 6371 flow [2023-08-30 07:30:46,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.61538461538461) internal successors, (1360), 13 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:46,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:46,322 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:30:46,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:46,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:46,525 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:30:46,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1898478316, now seen corresponding path program 17 times [2023-08-30 07:30:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:46,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170062113] [2023-08-30 07:30:46,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:30:46,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:46,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:46,527 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:46,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 07:30:46,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:30:46,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:30:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:30:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:30:47,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:30:47,174 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:30:47,175 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 07:30:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:30:47,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170062113] [2023-08-30 07:30:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170062113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:30:47,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:30:47,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2023-08-30 07:30:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102045795] [2023-08-30 07:30:47,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:30:47,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 07:30:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 07:30:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-30 07:30:48,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:30:48,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 364 transitions, 6371 flow. Second operand has 15 states, 15 states have (on average 104.13333333333334) internal successors, (1562), 15 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:48,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:48,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:30:48,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:50,300 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 07:30:52,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:54,533 WARN L539 Checker$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 07:30:56,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:59,176 WARN L539 Checker$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 07:31:01,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:31,696 INFO L130 PetriNetUnfolder]: 75080/137636 cut-off events. [2023-08-30 07:31:31,697 INFO L131 PetriNetUnfolder]: For 1511745/1511745 co-relation queries the response was YES. [2023-08-30 07:31:33,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621928 conditions, 137636 events. 75080/137636 cut-off events. For 1511745/1511745 co-relation queries the response was YES. Maximal size of possible extension queue 3474. Compared 1436340 event pairs, 5040 based on Foata normal form. 18/137654 useless extension candidates. Maximal degree in co-relation 621817. Up to 28404 conditions per place. [2023-08-30 07:31:33,668 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 118 selfloop transitions, 324 changer transitions 28/470 dead transitions. [2023-08-30 07:31:33,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 470 transitions, 8408 flow [2023-08-30 07:31:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:31:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:31:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1774 transitions. [2023-08-30 07:31:33,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137126865671642 [2023-08-30 07:31:33,672 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1774 transitions. [2023-08-30 07:31:33,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1774 transitions. [2023-08-30 07:31:33,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:31:33,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1774 transitions. [2023-08-30 07:31:33,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 110.875) internal successors, (1774), 16 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:33,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:33,678 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:33,678 INFO L175 Difference]: Start difference. First operand has 274 places, 364 transitions, 6371 flow. Second operand 16 states and 1774 transitions. [2023-08-30 07:31:33,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 470 transitions, 8408 flow [2023-08-30 07:32:03,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 470 transitions, 8157 flow, removed 95 selfloop flow, removed 6 redundant places. [2023-08-30 07:32:03,558 INFO L231 Difference]: Finished difference. Result has 287 places, 369 transitions, 7072 flow [2023-08-30 07:32:03,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7072, PETRI_PLACES=287, PETRI_TRANSITIONS=369} [2023-08-30 07:32:03,559 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 253 predicate places. [2023-08-30 07:32:03,559 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 369 transitions, 7072 flow [2023-08-30 07:32:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 104.13333333333334) internal successors, (1562), 15 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:03,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:32:03,560 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:32:03,571 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 07:32:03,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:32:03,769 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:32:03,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash -260647868, now seen corresponding path program 18 times [2023-08-30 07:32:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037537917] [2023-08-30 07:32:03,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:32:03,770 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 07:32:03,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:03,771 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:32:03,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-08-30 07:32:03,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 07:32:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:32:03,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:32:03,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:32:04,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:32:04,134 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 07:32:04,134 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2023-08-30 07:32:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:32:04,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:32:04,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037537917] [2023-08-30 07:32:04,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037537917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:32:04,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:32:04,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 07:32:04,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923152794] [2023-08-30 07:32:04,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:32:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:32:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:32:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:32:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:32:04,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 268 [2023-08-30 07:32:04,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 369 transitions, 7072 flow. Second operand has 12 states, 12 states have (on average 104.91666666666667) internal successors, (1259), 12 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:04,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:32:04,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 268 [2023-08-30 07:32:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:32:35,810 INFO L130 PetriNetUnfolder]: 75080/137402 cut-off events. [2023-08-30 07:32:35,810 INFO L131 PetriNetUnfolder]: For 1538097/1538097 co-relation queries the response was YES. [2023-08-30 07:32:37,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639694 conditions, 137402 events. 75080/137402 cut-off events. For 1538097/1538097 co-relation queries the response was YES. Maximal size of possible extension queue 3453. Compared 1434301 event pairs, 5670 based on Foata normal form. 234/137636 useless extension candidates. Maximal degree in co-relation 639583. Up to 40285 conditions per place. [2023-08-30 07:32:37,931 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 144 selfloop transitions, 275 changer transitions 76/495 dead transitions. [2023-08-30 07:32:37,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 495 transitions, 8485 flow [2023-08-30 07:32:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 07:32:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 07:32:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2109 transitions. [2023-08-30 07:32:37,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141791044776119 [2023-08-30 07:32:37,934 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2109 transitions. [2023-08-30 07:32:37,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2109 transitions. [2023-08-30 07:32:37,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:32:37,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2109 transitions. [2023-08-30 07:32:37,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.0) internal successors, (2109), 19 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:37,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:37,940 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:37,940 INFO L175 Difference]: Start difference. First operand has 287 places, 369 transitions, 7072 flow. Second operand 19 states and 2109 transitions. [2023-08-30 07:32:37,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 495 transitions, 8485 flow [2023-08-30 07:33:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 495 transitions, 7899 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-30 07:33:31,270 INFO L231 Difference]: Finished difference. Result has 305 places, 382 transitions, 7360 flow [2023-08-30 07:33:31,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7360, PETRI_PLACES=305, PETRI_TRANSITIONS=382} [2023-08-30 07:33:31,270 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 271 predicate places. [2023-08-30 07:33:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 382 transitions, 7360 flow [2023-08-30 07:33:31,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.91666666666667) internal successors, (1259), 12 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:31,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:33:31,271 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:33:31,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-08-30 07:33:31,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:33:31,471 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:33:31,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:33:31,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1801638588, now seen corresponding path program 19 times [2023-08-30 07:33:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:33:31,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718642683] [2023-08-30 07:33:31,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:33:31,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:33:31,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:33:31,473 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:33:31,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-08-30 07:33:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:33:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:33:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:33:31,757 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 07:33:31,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2023-08-30 07:33:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:33:32,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:33:32,181 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_985 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_985) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv15 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv14 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset (_ bv13 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv12 32))))) (_ bv5 32))) is different from false [2023-08-30 07:33:32,288 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-08-30 07:33:32,288 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2023-08-30 07:33:32,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:33:32,371 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 37 treesize of output 9 [2023-08-30 07:33:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2023-08-30 07:33:32,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:33:32,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718642683] [2023-08-30 07:33:32,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718642683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:33:32,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:33:32,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2023-08-30 07:33:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175590500] [2023-08-30 07:33:32,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:33:32,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 07:33:32,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:33:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 07:33:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=268, Unknown=1, NotChecked=32, Total=342 [2023-08-30 07:33:32,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 07:33:32,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 382 transitions, 7360 flow. Second operand has 19 states, 19 states have (on average 85.63157894736842) internal successors, (1627), 19 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:32,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:33:32,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 07:33:32,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:33:34,859 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 07:33:37,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:33:39,150 WARN L539 Checker$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 07:33:41,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:33:43,863 WARN L539 Checker$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 07:33:46,047 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 07:34:18,154 INFO L130 PetriNetUnfolder]: 75368/137924 cut-off events. [2023-08-30 07:34:18,155 INFO L131 PetriNetUnfolder]: For 1348665/1348665 co-relation queries the response was YES. [2023-08-30 07:34:20,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653275 conditions, 137924 events. 75368/137924 cut-off events. For 1348665/1348665 co-relation queries the response was YES. Maximal size of possible extension queue 3479. Compared 1437793 event pairs, 5022 based on Foata normal form. 18/137942 useless extension candidates. Maximal degree in co-relation 653155. Up to 28512 conditions per place. [2023-08-30 07:34:20,443 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 85 selfloop transitions, 340 changer transitions 52/477 dead transitions. [2023-08-30 07:34:20,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 477 transitions, 8606 flow [2023-08-30 07:34:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:34:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:34:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1479 transitions. [2023-08-30 07:34:20,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449160447761194 [2023-08-30 07:34:20,446 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1479 transitions. [2023-08-30 07:34:20,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1479 transitions. [2023-08-30 07:34:20,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:34:20,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1479 transitions. [2023-08-30 07:34:20,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 92.4375) internal successors, (1479), 16 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:20,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:20,450 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:20,450 INFO L175 Difference]: Start difference. First operand has 305 places, 382 transitions, 7360 flow. Second operand 16 states and 1479 transitions. [2023-08-30 07:34:20,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 477 transitions, 8606 flow [2023-08-30 07:35:20,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 477 transitions, 8427 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-08-30 07:35:20,422 INFO L231 Difference]: Finished difference. Result has 315 places, 383 transitions, 7895 flow [2023-08-30 07:35:20,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7895, PETRI_PLACES=315, PETRI_TRANSITIONS=383} [2023-08-30 07:35:20,423 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 281 predicate places. [2023-08-30 07:35:20,423 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 383 transitions, 7895 flow [2023-08-30 07:35:20,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.63157894736842) internal successors, (1627), 19 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:20,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:35:20,424 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 07:35:20,435 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 07:35:20,629 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 07:35:20,629 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:35:20,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:35:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash -734533040, now seen corresponding path program 4 times [2023-08-30 07:35:20,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:35:20,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20528075] [2023-08-30 07:35:20,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:35:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:35:20,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:35:20,631 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 07:35:20,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-08-30 07:35:20,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:35:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:35:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 07:35:20,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:35:20,904 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:35:20,904 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 07:35:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:35:21,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:35:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:35:29,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:35:29,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20528075] [2023-08-30 07:35:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20528075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:35:29,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:35:29,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 07:35:29,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574137561] [2023-08-30 07:35:29,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:35:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 07:35:29,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:35:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 07:35:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 07:36:10,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-08-30 07:36:10,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 383 transitions, 7895 flow. Second operand has 48 states, 48 states have (on average 104.0) internal successors, (4992), 48 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:10,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:36:10,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-08-30 07:36:10,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:36:36,154 WARN L222 SmtUtils]: Spent 12.92s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:36:52,805 WARN L222 SmtUtils]: Spent 13.51s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:37:05,698 WARN L222 SmtUtils]: Spent 9.87s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:37:17,993 WARN L222 SmtUtils]: Spent 8.91s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:37:28,524 WARN L222 SmtUtils]: Spent 7.52s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:37:37,851 WARN L222 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:37:47,289 WARN L222 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:37:56,409 WARN L222 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15