./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:13:11,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:13:11,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:13:11,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:13:11,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:13:11,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:13:11,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:13:11,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:13:11,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:13:11,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:13:11,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:13:11,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:13:11,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:13:11,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:13:11,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:13:11,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:13:11,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:13:11,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:13:11,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:13:11,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:13:11,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:13:11,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:13:11,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:13:11,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:13:11,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:13:11,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:13:11,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:13:11,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:13:11,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:13:11,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:13:11,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:13:11,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:13:11,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:13:11,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:13:11,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:13:11,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:13:11,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:13:11,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:13:11,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:13:11,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:13:11,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:13:11,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:13:11,669 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:13:11,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:13:11,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:13:11,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:13:11,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:13:11,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:13:11,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:13:11,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:13:11,672 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:13:11,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:13:11,673 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:13:11,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:13:11,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:13:11,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:13:11,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:13:11,674 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:13:11,674 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:13:11,675 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:13:11,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:13:11,675 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:13:11,675 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:13:11,675 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:13:11,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:13:11,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:13:11,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:13:11,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:13:11,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:13:11,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:13:11,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:13:11,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:13:11,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:13:11,677 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:13:11,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:13:11,678 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:13:11,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:13:12,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:13:12,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:13:12,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:13:12,030 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:13:12,031 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:13:12,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-09-01 01:13:13,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:13:13,385 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:13:13,386 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-09-01 01:13:13,391 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f6bfb5f/afc69216c6544e5fb6b93e171324182c/FLAG1005976b0 [2023-09-01 01:13:13,413 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f6bfb5f/afc69216c6544e5fb6b93e171324182c [2023-09-01 01:13:13,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:13:13,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:13:13,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:13,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:13:13,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:13:13,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:13" (1/1) ... [2023-09-01 01:13:13,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c16ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:13, skipping insertion in model container [2023-09-01 01:13:13,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:13" (1/1) ... [2023-09-01 01:13:13,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:13:13,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:13:13,622 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/array-eq-symm.wvr.c[2251,2264] [2023-09-01 01:13:13,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:13,653 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) [2023-09-01 01:13:13,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20c012f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:13, skipping insertion in model container [2023-09-01 01:13:13,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:13,656 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:13:13,658 INFO L158 Benchmark]: Toolchain (without parser) took 239.01ms. Allocated memory is still 69.2MB. Free memory was 45.3MB in the beginning and 35.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:13:13,659 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory was 46.2MB in the beginning and 46.1MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:13:13,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.45ms. Allocated memory is still 69.2MB. Free memory was 45.1MB in the beginning and 35.8MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:13:13,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory was 46.2MB in the beginning and 46.1MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.45ms. Allocated memory is still 69.2MB. Free memory was 45.1MB in the beginning and 35.8MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:13:15,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:13:15,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:13:15,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:13:15,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:13:15,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:13:15,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:13:15,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:13:15,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:13:15,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:13:15,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:13:15,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:13:15,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:13:15,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:13:15,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:13:15,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:13:15,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:13:15,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:13:15,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:13:15,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:13:15,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:13:15,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:13:15,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:13:15,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:13:15,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:13:15,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:13:15,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:13:15,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:13:15,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:13:15,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:13:15,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:13:15,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:13:15,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:13:15,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:13:15,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:13:15,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:13:15,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:13:15,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:13:15,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:13:15,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:13:15,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:13:15,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:13:15,427 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:13:15,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:13:15,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:13:15,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:13:15,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:13:15,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:13:15,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:13:15,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:13:15,429 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:13:15,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:13:15,430 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:13:15,431 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:13:15,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:13:15,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:13:15,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:13:15,431 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:13:15,431 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:13:15,432 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:13:15,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:13:15,432 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:13:15,432 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:13:15,432 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:13:15,432 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:13:15,433 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:13:15,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:13:15,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:13:15,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:13:15,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:13:15,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:13:15,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:13:15,434 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:13:15,434 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:13:15,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:13:15,435 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:13:15,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:13:15,435 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:13:15,435 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:13:15,435 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:13:15,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:13:15,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:13:15,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:13:15,741 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:13:15,741 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:13:15,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-09-01 01:13:16,871 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:13:17,033 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:13:17,034 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-09-01 01:13:17,039 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/899285661/96622d73198f47b1a478d62f51025389/FLAG48af780ad [2023-09-01 01:13:17,055 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/899285661/96622d73198f47b1a478d62f51025389 [2023-09-01 01:13:17,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:13:17,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:13:17,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:17,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:13:17,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:13:17,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f02cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17, skipping insertion in model container [2023-09-01 01:13:17,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:13:17,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:13:17,211 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/array-eq-symm.wvr.c[2251,2264] [2023-09-01 01:13:17,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:17,231 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:13:17,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:13:17,242 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/array-eq-symm.wvr.c[2251,2264] [2023-09-01 01:13:17,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:17,250 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:13:17,267 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/array-eq-symm.wvr.c[2251,2264] [2023-09-01 01:13:17,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:13:17,284 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:13:17,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17 WrapperNode [2023-09-01 01:13:17,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:13:17,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:13:17,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:13:17,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:13:17,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,326 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2023-09-01 01:13:17,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:13:17,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:13:17,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:13:17,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:13:17,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:13:17,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:13:17,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:13:17,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:13:17,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (1/1) ... [2023-09-01 01:13:17,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:13:17,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:13:17,421 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) [2023-09-01 01:13:17,453 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 [2023-09-01 01:13:17,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:13:17,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:13:17,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:13:17,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:13:17,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:13:17,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:13:17,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:13:17,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:13:17,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:13:17,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:13:17,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:13:17,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:13:17,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:13:17,475 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:13:17,628 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:13:17,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:13:18,090 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:13:18,098 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:13:18,098 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 01:13:18,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:13:18 BoogieIcfgContainer [2023-09-01 01:13:18,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:13:18,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:13:18,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:13:18,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:13:18,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:13:17" (1/3) ... [2023-09-01 01:13:18,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b503d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:13:18, skipping insertion in model container [2023-09-01 01:13:18,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:13:17" (2/3) ... [2023-09-01 01:13:18,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b503d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:13:18, skipping insertion in model container [2023-09-01 01:13:18,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:13:18" (3/3) ... [2023-09-01 01:13:18,116 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-09-01 01:13:18,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:13:18,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-09-01 01:13:18,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:13:18,211 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:13:18,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 183 transitions, 382 flow [2023-09-01 01:13:18,300 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2023-09-01 01:13:18,301 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:13:18,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 15/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2023-09-01 01:13:18,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 183 transitions, 382 flow [2023-09-01 01:13:18,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 177 transitions, 366 flow [2023-09-01 01:13:18,314 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:13:18,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 177 transitions, 366 flow [2023-09-01 01:13:18,325 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 177 transitions, 366 flow [2023-09-01 01:13:18,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 177 transitions, 366 flow [2023-09-01 01:13:18,371 INFO L130 PetriNetUnfolder]: 15/177 cut-off events. [2023-09-01 01:13:18,375 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:13:18,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 236 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2023-09-01 01:13:18,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-09-01 01:13:32,872 INFO L134 LiptonReduction]: Checked pairs total: 2648 [2023-09-01 01:13:32,873 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-09-01 01:13:32,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:13:32,908 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;@62cc25e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:13:32,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-09-01 01:13:32,913 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:13:32,913 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:13:32,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:32,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:13:32,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:32,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 22182, now seen corresponding path program 1 times [2023-09-01 01:13:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:32,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055883968] [2023-09-01 01:13:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:32,934 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 [2023-09-01 01:13:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:32,941 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) [2023-09-01 01:13:32,947 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 [2023-09-01 01:13:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:33,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:13:33,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:33,194 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:13:33,195 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 [2023-09-01 01:13:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:33,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:33,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:33,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055883968] [2023-09-01 01:13:33,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055883968] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:33,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:33,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:13:33,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198561793] [2023-09-01 01:13:33,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:33,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:13:33,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:13:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:13:33,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-09-01 01:13:33,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:33,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:33,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-09-01 01:13:33,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:33,948 INFO L130 PetriNetUnfolder]: 753/1213 cut-off events. [2023-09-01 01:13:33,949 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 01:13:33,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1213 events. 753/1213 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5819 event pairs, 574 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 1106. Up to 609 conditions per place. [2023-09-01 01:13:33,960 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 71 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-09-01 01:13:33,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 75 transitions, 324 flow [2023-09-01 01:13:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:13:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:13:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-09-01 01:13:33,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49422222222222223 [2023-09-01 01:13:33,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-09-01 01:13:33,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-09-01 01:13:33,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:33,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-09-01 01:13:33,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,005 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 3 states and 556 transitions. [2023-09-01 01:13:34,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 75 transitions, 324 flow [2023-09-01 01:13:34,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 75 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:13:34,013 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 114 flow [2023-09-01 01:13:34,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-09-01 01:13:34,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-09-01 01:13:34,022 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 114 flow [2023-09-01 01:13:34,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:34,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:13:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:13:34,233 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 [2023-09-01 01:13:34,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:34,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash 22181, now seen corresponding path program 1 times [2023-09-01 01:13:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:34,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296781986] [2023-09-01 01:13:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:34,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:13:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:34,236 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) [2023-09-01 01:13:34,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 01:13:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:13:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:34,321 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:13:34,322 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 [2023-09-01 01:13:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:34,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:34,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296781986] [2023-09-01 01:13:34,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296781986] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:34,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:34,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:13:34,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631805297] [2023-09-01 01:13:34,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:13:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:13:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:13:34,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-09-01 01:13:34,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:34,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-09-01 01:13:34,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:34,751 INFO L130 PetriNetUnfolder]: 753/1209 cut-off events. [2023-09-01 01:13:34,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:13:34,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 1209 events. 753/1209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5832 event pairs, 574 based on Foata normal form. 2/329 useless extension candidates. Maximal degree in co-relation 1214. Up to 1209 conditions per place. [2023-09-01 01:13:34,757 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 01:13:34,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 190 flow [2023-09-01 01:13:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:13:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:13:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-09-01 01:13:34,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45866666666666667 [2023-09-01 01:13:34,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-09-01 01:13:34,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-09-01 01:13:34,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:34,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-09-01 01:13:34,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,765 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 114 flow. Second operand 3 states and 516 transitions. [2023-09-01 01:13:34,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 190 flow [2023-09-01 01:13:34,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:13:34,767 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 104 flow [2023-09-01 01:13:34,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-09-01 01:13:34,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-09-01 01:13:34,768 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 104 flow [2023-09-01 01:13:34,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:34,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:13:34,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:13:34,976 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 [2023-09-01 01:13:34,977 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:34,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:34,978 INFO L85 PathProgramCache]: Analyzing trace with hash 690091, now seen corresponding path program 1 times [2023-09-01 01:13:34,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:34,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372768785] [2023-09-01 01:13:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:34,978 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 [2023-09-01 01:13:34,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:34,980 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) [2023-09-01 01:13:34,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:13:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:13:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:13:35,104 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 01:13:35,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 01:13:35,187 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:13:35,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:13:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:35,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:35,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:35,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372768785] [2023-09-01 01:13:35,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372768785] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:35,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:35,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:13:35,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321638689] [2023-09-01 01:13:35,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:35,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:13:35,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:13:35,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:13:35,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-09-01 01:13:35,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:35,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:35,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-09-01 01:13:35,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:35,631 INFO L130 PetriNetUnfolder]: 573/943 cut-off events. [2023-09-01 01:13:35,631 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 01:13:35,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 943 events. 573/943 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 4393 event pairs, 432 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 1908. Up to 943 conditions per place. [2023-09-01 01:13:35,635 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-09-01 01:13:35,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 176 flow [2023-09-01 01:13:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:13:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:13:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-09-01 01:13:35,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648888888888889 [2023-09-01 01:13:35,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-09-01 01:13:35,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-09-01 01:13:35,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:35,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-09-01 01:13:35,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:35,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:35,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:35,643 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 104 flow. Second operand 3 states and 523 transitions. [2023-09-01 01:13:35,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 176 flow [2023-09-01 01:13:35,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:13:35,644 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 101 flow [2023-09-01 01:13:35,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-09-01 01:13:35,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2023-09-01 01:13:35,646 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 101 flow [2023-09-01 01:13:35,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:35,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:35,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:13:35,655 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 [2023-09-01 01:13:35,855 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 [2023-09-01 01:13:35,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:35,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 690093, now seen corresponding path program 1 times [2023-09-01 01:13:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:35,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709716003] [2023-09-01 01:13:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:35,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:13:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:35,859 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) [2023-09-01 01:13:35,862 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 [2023-09-01 01:13:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:35,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:13:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:35,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:13:35,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:13:35,967 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:13:35,968 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 [2023-09-01 01:13:35,983 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 [2023-09-01 01:13:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:13:36,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:13:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:36,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:36,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:36,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709716003] [2023-09-01 01:13:36,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709716003] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:36,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:36,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:13:36,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659021368] [2023-09-01 01:13:36,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:36,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:13:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:13:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:13:36,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-09-01 01:13:36,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:36,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:36,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-09-01 01:13:36,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:36,504 INFO L130 PetriNetUnfolder]: 393/677 cut-off events. [2023-09-01 01:13:36,504 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 01:13:36,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 677 events. 393/677 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3042 event pairs, 290 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 1376. Up to 677 conditions per place. [2023-09-01 01:13:36,512 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-09-01 01:13:36,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 169 flow [2023-09-01 01:13:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:13:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:13:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-09-01 01:13:36,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631111111111111 [2023-09-01 01:13:36,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-09-01 01:13:36,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-09-01 01:13:36,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:36,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-09-01 01:13:36,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:36,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:36,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:36,520 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 101 flow. Second operand 3 states and 521 transitions. [2023-09-01 01:13:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 169 flow [2023-09-01 01:13:36,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:13:36,521 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 98 flow [2023-09-01 01:13:36,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-09-01 01:13:36,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-09-01 01:13:36,522 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 98 flow [2023-09-01 01:13:36,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:36,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:36,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:13:36,541 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 [2023-09-01 01:13:36,732 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 [2023-09-01 01:13:36,733 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:36,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash 689550, now seen corresponding path program 1 times [2023-09-01 01:13:36,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:36,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192569113] [2023-09-01 01:13:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:36,735 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 [2023-09-01 01:13:36,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:36,736 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) [2023-09-01 01:13:36,742 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 [2023-09-01 01:13:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:36,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:13:36,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:36,848 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:13:36,849 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 [2023-09-01 01:13:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:36,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:13:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:37,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192569113] [2023-09-01 01:13:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192569113] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:13:37,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:13:37,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:13:37,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26597199] [2023-09-01 01:13:37,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:13:37,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:13:37,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:37,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:13:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:13:37,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-09-01 01:13:37,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:37,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:37,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-09-01 01:13:37,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:39,142 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2023-09-01 01:13:39,142 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 01:13:39,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1022 events. 593/1022 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5030 event pairs, 435 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2083. Up to 340 conditions per place. [2023-09-01 01:13:39,150 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 86 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2023-09-01 01:13:39,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 101 transitions, 456 flow [2023-09-01 01:13:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:13:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:13:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1001 transitions. [2023-09-01 01:13:39,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448888888888889 [2023-09-01 01:13:39,154 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1001 transitions. [2023-09-01 01:13:39,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1001 transitions. [2023-09-01 01:13:39,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:39,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1001 transitions. [2023-09-01 01:13:39,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.83333333333334) internal successors, (1001), 6 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,162 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,163 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 98 flow. Second operand 6 states and 1001 transitions. [2023-09-01 01:13:39,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 101 transitions, 456 flow [2023-09-01 01:13:39,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 101 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:13:39,167 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 210 flow [2023-09-01 01:13:39,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-09-01 01:13:39,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-09-01 01:13:39,170 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 210 flow [2023-09-01 01:13:39,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:39,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:13:39,183 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 [2023-09-01 01:13:39,380 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 [2023-09-01 01:13:39,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:39,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:39,382 INFO L85 PathProgramCache]: Analyzing trace with hash 663193595, now seen corresponding path program 1 times [2023-09-01 01:13:39,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:39,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831142065] [2023-09-01 01:13:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:39,382 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 [2023-09-01 01:13:39,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:39,384 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) [2023-09-01 01:13:39,387 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 [2023-09-01 01:13:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:13:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:39,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:13:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:39,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:39,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831142065] [2023-09-01 01:13:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831142065] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:39,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:39,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:13:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933808916] [2023-09-01 01:13:39,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:39,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:13:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:13:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:13:39,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-09-01 01:13:39,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:39,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-09-01 01:13:39,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:39,894 INFO L130 PetriNetUnfolder]: 455/788 cut-off events. [2023-09-01 01:13:39,894 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:13:39,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 788 events. 455/788 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3603 event pairs, 315 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 1652. Up to 770 conditions per place. [2023-09-01 01:13:39,898 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 41 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-09-01 01:13:39,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 296 flow [2023-09-01 01:13:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:13:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:13:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2023-09-01 01:13:39,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2023-09-01 01:13:39,901 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2023-09-01 01:13:39,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2023-09-01 01:13:39,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:39,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2023-09-01 01:13:39,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,914 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,915 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 210 flow. Second operand 4 states and 645 transitions. [2023-09-01 01:13:39,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 296 flow [2023-09-01 01:13:39,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 01:13:39,920 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 195 flow [2023-09-01 01:13:39,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-09-01 01:13:39,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-09-01 01:13:39,922 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 195 flow [2023-09-01 01:13:39,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:39,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:39,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:13:39,933 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 [2023-09-01 01:13:40,131 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 [2023-09-01 01:13:40,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:40,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash 663193558, now seen corresponding path program 1 times [2023-09-01 01:13:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:40,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503047031] [2023-09-01 01:13:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:40,133 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 [2023-09-01 01:13:40,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:40,134 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) [2023-09-01 01:13:40,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 01:13:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:13:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:40,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:40,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503047031] [2023-09-01 01:13:40,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503047031] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:40,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:40,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:13:40,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710310662] [2023-09-01 01:13:40,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:40,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:13:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:40,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:13:40,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:13:40,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-09-01 01:13:40,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:40,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:40,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-09-01 01:13:40,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:40,830 INFO L130 PetriNetUnfolder]: 592/1084 cut-off events. [2023-09-01 01:13:40,831 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 01:13:40,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1084 events. 592/1084 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5674 event pairs, 426 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 2277. Up to 787 conditions per place. [2023-09-01 01:13:40,837 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 69 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-09-01 01:13:40,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 443 flow [2023-09-01 01:13:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:13:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:13:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-09-01 01:13:40,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573333333333333 [2023-09-01 01:13:40,840 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-09-01 01:13:40,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-09-01 01:13:40,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:40,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-09-01 01:13:40,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 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) [2023-09-01 01:13:40,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:40,844 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:40,845 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 195 flow. Second operand 4 states and 686 transitions. [2023-09-01 01:13:40,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 443 flow [2023-09-01 01:13:40,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:13:40,848 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 205 flow [2023-09-01 01:13:40,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-09-01 01:13:40,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2023-09-01 01:13:40,849 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 205 flow [2023-09-01 01:13:40,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:40,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:40,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:13:40,863 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 [2023-09-01 01:13:41,059 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 [2023-09-01 01:13:41,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:41,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 663193646, now seen corresponding path program 1 times [2023-09-01 01:13:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:41,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528252388] [2023-09-01 01:13:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:41,060 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 [2023-09-01 01:13:41,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:41,061 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) [2023-09-01 01:13:41,062 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 [2023-09-01 01:13:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:13:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:41,192 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 01:13:41,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-09-01 01:13:41,256 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:13:41,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:13:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:41,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:41,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:41,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528252388] [2023-09-01 01:13:41,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528252388] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:41,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:41,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:13:41,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854639553] [2023-09-01 01:13:41,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:41,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:13:41,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:13:41,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:13:41,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-09-01 01:13:41,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:41,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:41,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-09-01 01:13:41,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:41,579 INFO L130 PetriNetUnfolder]: 538/976 cut-off events. [2023-09-01 01:13:41,579 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 01:13:41,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 976 events. 538/976 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4987 event pairs, 384 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 2219. Up to 976 conditions per place. [2023-09-01 01:13:41,584 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-09-01 01:13:41,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 287 flow [2023-09-01 01:13:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:13:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:13:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-09-01 01:13:41,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45422222222222225 [2023-09-01 01:13:41,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-09-01 01:13:41,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-09-01 01:13:41,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:41,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-09-01 01:13:41,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:41,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:41,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:41,590 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 205 flow. Second operand 3 states and 511 transitions. [2023-09-01 01:13:41,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 287 flow [2023-09-01 01:13:41,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 281 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:13:41,593 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 197 flow [2023-09-01 01:13:41,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-09-01 01:13:41,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-09-01 01:13:41,595 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 197 flow [2023-09-01 01:13:41,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:41,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:41,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:13:41,607 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 [2023-09-01 01:13:41,806 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 [2023-09-01 01:13:41,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:41,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 663193647, now seen corresponding path program 1 times [2023-09-01 01:13:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301082009] [2023-09-01 01:13:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:13:41,807 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 [2023-09-01 01:13:41,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:41,808 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) [2023-09-01 01:13:41,810 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 [2023-09-01 01:13:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:13:41,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:13:41,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:13:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:13:41,920 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:13:41,920 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 [2023-09-01 01:13:41,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 01:13:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:13:41,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:13:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:42,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:13:42,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:42,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301082009] [2023-09-01 01:13:42,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301082009] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:13:42,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:13:42,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:13:42,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136291265] [2023-09-01 01:13:42,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:13:42,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:13:42,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:13:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:13:42,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-09-01 01:13:42,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:42,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:42,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-09-01 01:13:42,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:42,427 INFO L130 PetriNetUnfolder]: 484/868 cut-off events. [2023-09-01 01:13:42,428 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 01:13:42,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 868 events. 484/868 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4269 event pairs, 342 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 1988. Up to 868 conditions per place. [2023-09-01 01:13:42,432 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-09-01 01:13:42,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 275 flow [2023-09-01 01:13:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:13:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:13:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-09-01 01:13:42,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524444444444444 [2023-09-01 01:13:42,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-09-01 01:13:42,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-09-01 01:13:42,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:13:42,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-09-01 01:13:42,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:42,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:42,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:42,439 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 197 flow. Second operand 3 states and 509 transitions. [2023-09-01 01:13:42,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 275 flow [2023-09-01 01:13:42,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:13:42,441 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 194 flow [2023-09-01 01:13:42,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-09-01 01:13:42,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-09-01 01:13:42,442 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 194 flow [2023-09-01 01:13:42,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:42,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:13:42,443 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:13:42,455 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 [2023-09-01 01:13:42,652 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 [2023-09-01 01:13:42,653 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:13:42,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:13:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash -930557786, now seen corresponding path program 2 times [2023-09-01 01:13:42,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:13:42,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464872357] [2023-09-01 01:13:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:13:42,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:13:42,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:13:42,655 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) [2023-09-01 01:13:42,658 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 [2023-09-01 01:13:42,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:13:42,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:13:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:13:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:13:42,780 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:13:42,781 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 [2023-09-01 01:13:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:42,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:13:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:13:43,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:13:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464872357] [2023-09-01 01:13:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464872357] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:13:43,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:13:43,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:13:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771651509] [2023-09-01 01:13:43,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:13:43,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:13:43,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:13:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:13:43,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:13:47,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-09-01 01:13:47,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:13:47,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:13:47,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-09-01 01:13:47,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:13:50,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:13:51,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:13:53,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:13:55,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:13:56,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:14:00,638 INFO L130 PetriNetUnfolder]: 1594/2850 cut-off events. [2023-09-01 01:14:00,638 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-09-01 01:14:00,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6461 conditions, 2850 events. 1594/2850 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16241 event pairs, 1140 based on Foata normal form. 18/1581 useless extension candidates. Maximal degree in co-relation 6442. Up to 481 conditions per place. [2023-09-01 01:14:00,649 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 215 selfloop transitions, 32 changer transitions 0/247 dead transitions. [2023-09-01 01:14:00,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 247 transitions, 1320 flow [2023-09-01 01:14:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:14:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:14:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2071 transitions. [2023-09-01 01:14:00,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602222222222222 [2023-09-01 01:14:00,655 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2071 transitions. [2023-09-01 01:14:00,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2071 transitions. [2023-09-01 01:14:00,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:00,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2071 transitions. [2023-09-01 01:14:00,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 172.58333333333334) internal successors, (2071), 12 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:00,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:00,667 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:00,667 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 194 flow. Second operand 12 states and 2071 transitions. [2023-09-01 01:14:00,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 247 transitions, 1320 flow [2023-09-01 01:14:00,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 247 transitions, 1319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:14:00,676 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 438 flow [2023-09-01 01:14:00,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=438, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-09-01 01:14:00,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-09-01 01:14:00,677 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 438 flow [2023-09-01 01:14:00,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:00,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:00,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:14:00,690 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 [2023-09-01 01:14:00,887 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 [2023-09-01 01:14:00,888 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:00,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash -930082796, now seen corresponding path program 1 times [2023-09-01 01:14:00,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621856649] [2023-09-01 01:14:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:00,889 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 [2023-09-01 01:14:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:00,890 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) [2023-09-01 01:14:00,890 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 [2023-09-01 01:14:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:00,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:14:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:00,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:14:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:01,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:01,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:01,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621856649] [2023-09-01 01:14:01,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621856649] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:01,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:01,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:14:01,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677609031] [2023-09-01 01:14:01,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:01,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:14:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:14:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:14:01,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-09-01 01:14:01,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:01,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:01,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-09-01 01:14:01,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:02,223 INFO L130 PetriNetUnfolder]: 2664/4640 cut-off events. [2023-09-01 01:14:02,224 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-09-01 01:14:02,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10561 conditions, 4640 events. 2664/4640 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 28299 event pairs, 990 based on Foata normal form. 0/2519 useless extension candidates. Maximal degree in co-relation 10534. Up to 2392 conditions per place. [2023-09-01 01:14:02,251 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 61 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2023-09-01 01:14:02,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 639 flow [2023-09-01 01:14:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:14:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:14:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 821 transitions. [2023-09-01 01:14:02,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378666666666667 [2023-09-01 01:14:02,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 821 transitions. [2023-09-01 01:14:02,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 821 transitions. [2023-09-01 01:14:02,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:02,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 821 transitions. [2023-09-01 01:14:02,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:02,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:02,259 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:02,259 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 438 flow. Second operand 5 states and 821 transitions. [2023-09-01 01:14:02,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 639 flow [2023-09-01 01:14:02,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 580 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 01:14:02,264 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 424 flow [2023-09-01 01:14:02,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-09-01 01:14:02,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2023-09-01 01:14:02,265 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 424 flow [2023-09-01 01:14:02,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:02,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:02,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:14:02,280 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 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:14:02,476 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 [2023-09-01 01:14:02,476 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:02,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash -930082833, now seen corresponding path program 1 times [2023-09-01 01:14:02,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:02,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017472194] [2023-09-01 01:14:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:02,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:02,478 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) [2023-09-01 01:14:02,479 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 [2023-09-01 01:14:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:14:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:02,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:02,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:02,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017472194] [2023-09-01 01:14:02,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017472194] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:02,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:02,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:14:02,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849900961] [2023-09-01 01:14:02,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:02,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:14:02,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:02,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:14:02,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:14:02,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-09-01 01:14:02,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:02,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:02,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-09-01 01:14:02,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:03,505 INFO L130 PetriNetUnfolder]: 2465/4321 cut-off events. [2023-09-01 01:14:03,505 INFO L131 PetriNetUnfolder]: For 433/433 co-relation queries the response was YES. [2023-09-01 01:14:03,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10241 conditions, 4321 events. 2465/4321 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26606 event pairs, 945 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 10212. Up to 2190 conditions per place. [2023-09-01 01:14:03,521 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 78 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2023-09-01 01:14:03,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 695 flow [2023-09-01 01:14:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:14:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:14:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-09-01 01:14:03,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45013333333333333 [2023-09-01 01:14:03,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-09-01 01:14:03,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-09-01 01:14:03,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:03,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-09-01 01:14:03,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:03,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:03,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:03,529 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 424 flow. Second operand 5 states and 844 transitions. [2023-09-01 01:14:03,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 695 flow [2023-09-01 01:14:03,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 665 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:14:03,535 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 456 flow [2023-09-01 01:14:03,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-09-01 01:14:03,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2023-09-01 01:14:03,536 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 456 flow [2023-09-01 01:14:03,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:03,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:03,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:03,548 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 [2023-09-01 01:14:03,746 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 [2023-09-01 01:14:03,746 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:03,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1231541263, now seen corresponding path program 1 times [2023-09-01 01:14:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:03,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212753833] [2023-09-01 01:14:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:03,747 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 [2023-09-01 01:14:03,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:03,748 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) [2023-09-01 01:14:03,748 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 [2023-09-01 01:14:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:03,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:14:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:03,934 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:14:03,934 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 [2023-09-01 01:14:03,987 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:14:03,987 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 [2023-09-01 01:14:04,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:04,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:14:04,144 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:14:04,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:14:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:04,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:14:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:04,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:04,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212753833] [2023-09-01 01:14:04,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212753833] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:14:04,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:14:04,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 01:14:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226470245] [2023-09-01 01:14:04,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:14:04,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:14:04,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:04,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:14:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:14:06,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2023-09-01 01:14:06,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 456 flow. Second operand has 8 states, 8 states have (on average 140.75) internal successors, (1126), 8 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:06,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:06,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2023-09-01 01:14:06,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:14,517 INFO L130 PetriNetUnfolder]: 4184/7452 cut-off events. [2023-09-01 01:14:14,517 INFO L131 PetriNetUnfolder]: For 1983/1983 co-relation queries the response was YES. [2023-09-01 01:14:14,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18634 conditions, 7452 events. 4184/7452 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 53156 event pairs, 1890 based on Foata normal form. 0/4668 useless extension candidates. Maximal degree in co-relation 18603. Up to 1782 conditions per place. [2023-09-01 01:14:14,551 INFO L137 encePairwiseOnDemand]: 364/375 looper letters, 218 selfloop transitions, 44 changer transitions 0/262 dead transitions. [2023-09-01 01:14:14,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 262 transitions, 1795 flow [2023-09-01 01:14:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:14:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:14:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2442 transitions. [2023-09-01 01:14:14,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407 [2023-09-01 01:14:14,558 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2442 transitions. [2023-09-01 01:14:14,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2442 transitions. [2023-09-01 01:14:14,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:14,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2442 transitions. [2023-09-01 01:14:14,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 152.625) internal successors, (2442), 16 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:14,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:14,571 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:14,571 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 456 flow. Second operand 16 states and 2442 transitions. [2023-09-01 01:14:14,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 262 transitions, 1795 flow [2023-09-01 01:14:14,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 262 transitions, 1750 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-09-01 01:14:14,583 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 883 flow [2023-09-01 01:14:14,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=883, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-09-01 01:14:14,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2023-09-01 01:14:14,584 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 883 flow [2023-09-01 01:14:14,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 140.75) internal successors, (1126), 8 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:14,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:14,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:14,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-09-01 01:14:14,797 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 [2023-09-01 01:14:14,797 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:14,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:14,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1231541262, now seen corresponding path program 1 times [2023-09-01 01:14:14,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:14,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307125380] [2023-09-01 01:14:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:14,799 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 [2023-09-01 01:14:14,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:14,800 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) [2023-09-01 01:14:14,803 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 [2023-09-01 01:14:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:14,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:14:14,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:14,957 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:14:14,957 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 [2023-09-01 01:14:14,992 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:14:14,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 01:14:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:14:15,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:15,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307125380] [2023-09-01 01:14:15,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307125380] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:15,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:15,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:14:15,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27603679] [2023-09-01 01:14:15,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:14:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:15,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:14:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:14:15,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-09-01 01:14:15,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 883 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:15,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:15,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-09-01 01:14:15,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:15,785 INFO L130 PetriNetUnfolder]: 2924/5294 cut-off events. [2023-09-01 01:14:15,785 INFO L131 PetriNetUnfolder]: For 8001/8001 co-relation queries the response was YES. [2023-09-01 01:14:15,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 5294 events. 2924/5294 cut-off events. For 8001/8001 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 34965 event pairs, 2004 based on Foata normal form. 370/4302 useless extension candidates. Maximal degree in co-relation 15200. Up to 5281 conditions per place. [2023-09-01 01:14:15,824 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 76 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2023-09-01 01:14:15,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 88 transitions, 1051 flow [2023-09-01 01:14:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:14:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:14:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-09-01 01:14:15,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-09-01 01:14:15,827 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-09-01 01:14:15,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-09-01 01:14:15,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:15,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-09-01 01:14:15,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:15,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:15,831 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:15,831 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 883 flow. Second operand 4 states and 639 transitions. [2023-09-01 01:14:15,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 88 transitions, 1051 flow [2023-09-01 01:14:15,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 88 transitions, 1041 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-09-01 01:14:15,866 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 889 flow [2023-09-01 01:14:15,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-09-01 01:14:15,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2023-09-01 01:14:15,868 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 889 flow [2023-09-01 01:14:15,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:15,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:15,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:15,880 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 [2023-09-01 01:14:16,078 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 [2023-09-01 01:14:16,078 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:16,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1673948147, now seen corresponding path program 1 times [2023-09-01 01:14:16,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:16,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855435163] [2023-09-01 01:14:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:16,080 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 [2023-09-01 01:14:16,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:16,081 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) [2023-09-01 01:14:16,082 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 [2023-09-01 01:14:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:14:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:14:16,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:16,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:16,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855435163] [2023-09-01 01:14:16,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855435163] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:16,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:16,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:14:16,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477527306] [2023-09-01 01:14:16,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:16,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:14:16,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:16,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:14:16,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:14:16,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-09-01 01:14:16,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 889 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 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) [2023-09-01 01:14:16,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:16,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-09-01 01:14:16,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:17,021 INFO L130 PetriNetUnfolder]: 2744/4994 cut-off events. [2023-09-01 01:14:17,021 INFO L131 PetriNetUnfolder]: For 8348/8348 co-relation queries the response was YES. [2023-09-01 01:14:17,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14474 conditions, 4994 events. 2744/4994 cut-off events. For 8348/8348 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 33198 event pairs, 1884 based on Foata normal form. 0/3812 useless extension candidates. Maximal degree in co-relation 14428. Up to 4700 conditions per place. [2023-09-01 01:14:17,049 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 107 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-09-01 01:14:17,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 1271 flow [2023-09-01 01:14:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:14:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:14:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 671 transitions. [2023-09-01 01:14:17,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44733333333333336 [2023-09-01 01:14:17,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 671 transitions. [2023-09-01 01:14:17,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 671 transitions. [2023-09-01 01:14:17,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:17,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 671 transitions. [2023-09-01 01:14:17,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:17,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:17,056 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:17,056 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 889 flow. Second operand 4 states and 671 transitions. [2023-09-01 01:14:17,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 1271 flow [2023-09-01 01:14:17,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 110 transitions, 1258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:14:17,092 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 889 flow [2023-09-01 01:14:17,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2023-09-01 01:14:17,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2023-09-01 01:14:17,092 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 889 flow [2023-09-01 01:14:17,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 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) [2023-09-01 01:14:17,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:17,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:17,107 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 [2023-09-01 01:14:17,302 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 [2023-09-01 01:14:17,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:17,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:17,303 INFO L85 PathProgramCache]: Analyzing trace with hash -456307222, now seen corresponding path program 1 times [2023-09-01 01:14:17,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:17,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354277559] [2023-09-01 01:14:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:17,304 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 [2023-09-01 01:14:17,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:17,305 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) [2023-09-01 01:14:17,305 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 [2023-09-01 01:14:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:17,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:14:17,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:17,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:14:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:17,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:17,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:17,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354277559] [2023-09-01 01:14:17,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354277559] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:17,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:17,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:14:17,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104511267] [2023-09-01 01:14:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:17,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:14:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:17,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:14:17,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:14:17,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-09-01 01:14:17,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:17,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:17,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-09-01 01:14:17,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:18,735 INFO L130 PetriNetUnfolder]: 4457/7989 cut-off events. [2023-09-01 01:14:18,735 INFO L131 PetriNetUnfolder]: For 14996/14996 co-relation queries the response was YES. [2023-09-01 01:14:18,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 7989 events. 4457/7989 cut-off events. For 14996/14996 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 57603 event pairs, 1403 based on Foata normal form. 0/6807 useless extension candidates. Maximal degree in co-relation 24598. Up to 4355 conditions per place. [2023-09-01 01:14:18,778 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 81 selfloop transitions, 29 changer transitions 0/110 dead transitions. [2023-09-01 01:14:18,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 1247 flow [2023-09-01 01:14:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:14:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:14:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 815 transitions. [2023-09-01 01:14:18,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43466666666666665 [2023-09-01 01:14:18,781 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 815 transitions. [2023-09-01 01:14:18,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 815 transitions. [2023-09-01 01:14:18,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:18,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 815 transitions. [2023-09-01 01:14:18,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:18,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:18,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:18,785 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 889 flow. Second operand 5 states and 815 transitions. [2023-09-01 01:14:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 1247 flow [2023-09-01 01:14:18,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 110 transitions, 1242 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:14:18,825 INFO L231 Difference]: Finished difference. Result has 98 places, 89 transitions, 967 flow [2023-09-01 01:14:18,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=967, PETRI_PLACES=98, PETRI_TRANSITIONS=89} [2023-09-01 01:14:18,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2023-09-01 01:14:18,826 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 89 transitions, 967 flow [2023-09-01 01:14:18,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:18,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:18,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:18,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-09-01 01:14:19,037 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 [2023-09-01 01:14:19,037 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:19,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash -456307189, now seen corresponding path program 1 times [2023-09-01 01:14:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:19,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020788433] [2023-09-01 01:14:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:19,038 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 [2023-09-01 01:14:19,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:19,039 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) [2023-09-01 01:14:19,042 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 [2023-09-01 01:14:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:19,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:14:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:19,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:14:19,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:19,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020788433] [2023-09-01 01:14:19,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020788433] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:14:19,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:14:19,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:14:19,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455629827] [2023-09-01 01:14:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:14:19,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:14:19,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:14:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:14:19,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-09-01 01:14:19,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 89 transitions, 967 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:19,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:19,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-09-01 01:14:19,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:20,380 INFO L130 PetriNetUnfolder]: 4349/7785 cut-off events. [2023-09-01 01:14:20,380 INFO L131 PetriNetUnfolder]: For 17038/17038 co-relation queries the response was YES. [2023-09-01 01:14:20,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25706 conditions, 7785 events. 4349/7785 cut-off events. For 17038/17038 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 55303 event pairs, 1385 based on Foata normal form. 36/7445 useless extension candidates. Maximal degree in co-relation 25658. Up to 4187 conditions per place. [2023-09-01 01:14:20,422 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 101 selfloop transitions, 19 changer transitions 0/120 dead transitions. [2023-09-01 01:14:20,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 120 transitions, 1365 flow [2023-09-01 01:14:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:14:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:14:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 833 transitions. [2023-09-01 01:14:20,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44426666666666664 [2023-09-01 01:14:20,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 833 transitions. [2023-09-01 01:14:20,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 833 transitions. [2023-09-01 01:14:20,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:20,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 833 transitions. [2023-09-01 01:14:20,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.6) internal successors, (833), 5 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:20,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:20,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:20,428 INFO L175 Difference]: Start difference. First operand has 98 places, 89 transitions, 967 flow. Second operand 5 states and 833 transitions. [2023-09-01 01:14:20,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 120 transitions, 1365 flow [2023-09-01 01:14:20,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 120 transitions, 1324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:14:20,471 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 969 flow [2023-09-01 01:14:20,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=969, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-09-01 01:14:20,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2023-09-01 01:14:20,472 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 969 flow [2023-09-01 01:14:20,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:20,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:20,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:20,485 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 [2023-09-01 01:14:20,681 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 [2023-09-01 01:14:20,682 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:20,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1899722197, now seen corresponding path program 1 times [2023-09-01 01:14:20,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:20,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449144401] [2023-09-01 01:14:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:20,683 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 [2023-09-01 01:14:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:20,684 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) [2023-09-01 01:14:20,685 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 [2023-09-01 01:14:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:14:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:20,867 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:14:20,868 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 [2023-09-01 01:14:20,907 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:14:20,908 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 [2023-09-01 01:14:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:21,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:14:21,013 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:14:21,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:14:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:21,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:14:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:23,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:23,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449144401] [2023-09-01 01:14:23,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449144401] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:14:23,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:14:23,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 01:14:23,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046987092] [2023-09-01 01:14:23,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:14:23,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:14:23,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:23,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:14:23,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:14:26,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2023-09-01 01:14:26,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 140.25) internal successors, (1122), 8 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:26,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:26,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2023-09-01 01:14:26,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:35,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 01:14:38,079 INFO L130 PetriNetUnfolder]: 5581/10107 cut-off events. [2023-09-01 01:14:38,079 INFO L131 PetriNetUnfolder]: For 25690/25690 co-relation queries the response was YES. [2023-09-01 01:14:38,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34153 conditions, 10107 events. 5581/10107 cut-off events. For 25690/25690 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 76403 event pairs, 2389 based on Foata normal form. 448/10139 useless extension candidates. Maximal degree in co-relation 34104. Up to 4563 conditions per place. [2023-09-01 01:14:38,127 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 207 selfloop transitions, 40 changer transitions 0/247 dead transitions. [2023-09-01 01:14:38,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 247 transitions, 2302 flow [2023-09-01 01:14:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:14:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:14:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2386 transitions. [2023-09-01 01:14:38,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39766666666666667 [2023-09-01 01:14:38,132 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2386 transitions. [2023-09-01 01:14:38,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2386 transitions. [2023-09-01 01:14:38,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:38,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2386 transitions. [2023-09-01 01:14:38,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 149.125) internal successors, (2386), 16 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:38,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:38,143 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:38,143 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 969 flow. Second operand 16 states and 2386 transitions. [2023-09-01 01:14:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 247 transitions, 2302 flow [2023-09-01 01:14:38,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 247 transitions, 2277 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:14:38,180 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 1098 flow [2023-09-01 01:14:38,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1098, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-09-01 01:14:38,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2023-09-01 01:14:38,181 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 1098 flow [2023-09-01 01:14:38,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 140.25) internal successors, (1122), 8 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:38,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:38,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:38,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 01:14:38,392 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 [2023-09-01 01:14:38,393 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:38,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1899766056, now seen corresponding path program 1 times [2023-09-01 01:14:38,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:38,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845831708] [2023-09-01 01:14:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:38,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:38,395 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) [2023-09-01 01:14:38,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 01:14:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:14:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:38,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:14:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:38,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:38,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845831708] [2023-09-01 01:14:38,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845831708] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:14:38,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:14:38,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:14:38,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101070862] [2023-09-01 01:14:38,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:14:38,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:14:38,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:14:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:14:39,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-09-01 01:14:39,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 1098 flow. Second operand has 10 states, 10 states have (on average 153.8) internal successors, (1538), 10 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:39,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:39,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-09-01 01:14:39,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:41,266 INFO L130 PetriNetUnfolder]: 5123/9387 cut-off events. [2023-09-01 01:14:41,266 INFO L131 PetriNetUnfolder]: For 35724/35724 co-relation queries the response was YES. [2023-09-01 01:14:41,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 9387 events. 5123/9387 cut-off events. For 35724/35724 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 70846 event pairs, 1809 based on Foata normal form. 402/9789 useless extension candidates. Maximal degree in co-relation 34967. Up to 3858 conditions per place. [2023-09-01 01:14:41,319 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 146 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2023-09-01 01:14:41,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1888 flow [2023-09-01 01:14:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:14:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:14:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1460 transitions. [2023-09-01 01:14:41,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325925925925926 [2023-09-01 01:14:41,322 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1460 transitions. [2023-09-01 01:14:41,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1460 transitions. [2023-09-01 01:14:41,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:41,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1460 transitions. [2023-09-01 01:14:41,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.22222222222223) internal successors, (1460), 9 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) [2023-09-01 01:14:41,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:41,326 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:41,326 INFO L175 Difference]: Start difference. First operand has 118 places, 94 transitions, 1098 flow. Second operand 9 states and 1460 transitions. [2023-09-01 01:14:41,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1888 flow [2023-09-01 01:14:41,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 168 transitions, 1815 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-09-01 01:14:41,392 INFO L231 Difference]: Finished difference. Result has 120 places, 95 transitions, 1162 flow [2023-09-01 01:14:41,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1162, PETRI_PLACES=120, PETRI_TRANSITIONS=95} [2023-09-01 01:14:41,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2023-09-01 01:14:41,393 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 95 transitions, 1162 flow [2023-09-01 01:14:41,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.8) internal successors, (1538), 10 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:41,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:41,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:41,407 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 [2023-09-01 01:14:41,607 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 [2023-09-01 01:14:41,608 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:41,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash -375743760, now seen corresponding path program 2 times [2023-09-01 01:14:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:41,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500585761] [2023-09-01 01:14:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:14:41,608 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 [2023-09-01 01:14:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:41,609 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) [2023-09-01 01:14:41,611 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 [2023-09-01 01:14:41,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:14:41,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:14:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:14:41,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:41,750 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:14:41,751 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 27 [2023-09-01 01:14:41,792 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:14:41,793 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 [2023-09-01 01:14:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:14:41,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:14:41,884 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:14:41,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:14:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:41,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:14:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:44,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:44,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500585761] [2023-09-01 01:14:44,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500585761] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:14:44,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:14:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:14:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918104486] [2023-09-01 01:14:44,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:14:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:14:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:14:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:14:50,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:14:51,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-09-01 01:14:51,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 95 transitions, 1162 flow. Second operand has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:51,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:51,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-09-01 01:14:51,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:55,761 INFO L130 PetriNetUnfolder]: 6809/12639 cut-off events. [2023-09-01 01:14:55,762 INFO L131 PetriNetUnfolder]: For 53633/53633 co-relation queries the response was YES. [2023-09-01 01:14:55,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46574 conditions, 12639 events. 6809/12639 cut-off events. For 53633/53633 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 101637 event pairs, 1446 based on Foata normal form. 342/12981 useless extension candidates. Maximal degree in co-relation 46517. Up to 2792 conditions per place. [2023-09-01 01:14:55,839 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 249 selfloop transitions, 31 changer transitions 0/280 dead transitions. [2023-09-01 01:14:55,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 280 transitions, 2656 flow [2023-09-01 01:14:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:14:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:14:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2192 transitions. [2023-09-01 01:14:55,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175238095238095 [2023-09-01 01:14:55,844 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2192 transitions. [2023-09-01 01:14:55,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2192 transitions. [2023-09-01 01:14:55,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:55,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2192 transitions. [2023-09-01 01:14:55,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 156.57142857142858) internal successors, (2192), 14 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:55,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:55,853 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:55,853 INFO L175 Difference]: Start difference. First operand has 120 places, 95 transitions, 1162 flow. Second operand 14 states and 2192 transitions. [2023-09-01 01:14:55,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 280 transitions, 2656 flow [2023-09-01 01:14:55,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 280 transitions, 2633 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 01:14:55,922 INFO L231 Difference]: Finished difference. Result has 137 places, 102 transitions, 1322 flow [2023-09-01 01:14:55,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1322, PETRI_PLACES=137, PETRI_TRANSITIONS=102} [2023-09-01 01:14:55,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2023-09-01 01:14:55,923 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 102 transitions, 1322 flow [2023-09-01 01:14:55,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:55,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:55,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:55,939 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 [2023-09-01 01:14:56,134 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 [2023-09-01 01:14:56,135 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:56,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1238156902, now seen corresponding path program 1 times [2023-09-01 01:14:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624659729] [2023-09-01 01:14:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:56,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:14:56,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:56,136 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) [2023-09-01 01:14:56,137 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 [2023-09-01 01:14:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:14:56,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:14:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:14:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:56,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:14:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:14:56,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:14:56,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624659729] [2023-09-01 01:14:56,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624659729] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:14:56,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:14:56,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:14:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998963916] [2023-09-01 01:14:56,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:14:56,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:14:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:14:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:14:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:14:57,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-09-01 01:14:57,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 102 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:57,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:14:57,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-09-01 01:14:57,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:14:59,542 INFO L130 PetriNetUnfolder]: 6163/11591 cut-off events. [2023-09-01 01:14:59,543 INFO L131 PetriNetUnfolder]: For 55833/55833 co-relation queries the response was YES. [2023-09-01 01:14:59,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45683 conditions, 11591 events. 6163/11591 cut-off events. For 55833/55833 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 92790 event pairs, 2619 based on Foata normal form. 486/12077 useless extension candidates. Maximal degree in co-relation 45618. Up to 4963 conditions per place. [2023-09-01 01:14:59,619 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 149 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2023-09-01 01:14:59,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 172 transitions, 2122 flow [2023-09-01 01:14:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:14:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:14:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1454 transitions. [2023-09-01 01:14:59,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308148148148148 [2023-09-01 01:14:59,622 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1454 transitions. [2023-09-01 01:14:59,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1454 transitions. [2023-09-01 01:14:59,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:14:59,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1454 transitions. [2023-09-01 01:14:59,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.55555555555554) internal successors, (1454), 9 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:59,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:59,627 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:59,627 INFO L175 Difference]: Start difference. First operand has 137 places, 102 transitions, 1322 flow. Second operand 9 states and 1454 transitions. [2023-09-01 01:14:59,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 172 transitions, 2122 flow [2023-09-01 01:14:59,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 2023 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-09-01 01:14:59,772 INFO L231 Difference]: Finished difference. Result has 139 places, 101 transitions, 1287 flow [2023-09-01 01:14:59,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=139, PETRI_TRANSITIONS=101} [2023-09-01 01:14:59,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2023-09-01 01:14:59,773 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 101 transitions, 1287 flow [2023-09-01 01:14:59,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:14:59,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:14:59,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:14:59,782 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 [2023-09-01 01:14:59,976 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 [2023-09-01 01:14:59,977 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:14:59,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:14:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash -375743723, now seen corresponding path program 1 times [2023-09-01 01:14:59,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:14:59,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886423380] [2023-09-01 01:14:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:14:59,978 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 [2023-09-01 01:14:59,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:14:59,978 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) [2023-09-01 01:14:59,980 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 [2023-09-01 01:15:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:15:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:15:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:00,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:15:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:15:00,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:15:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:15:00,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:00,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886423380] [2023-09-01 01:15:00,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886423380] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:15:00,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:15:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:15:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323994010] [2023-09-01 01:15:00,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:15:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:15:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:15:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:15:03,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-09-01 01:15:03,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 101 transitions, 1287 flow. Second operand has 12 states, 12 states have (on average 152.5) internal successors, (1830), 12 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:03,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:03,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-09-01 01:15:03,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:07,342 INFO L130 PetriNetUnfolder]: 9133/16901 cut-off events. [2023-09-01 01:15:07,342 INFO L131 PetriNetUnfolder]: For 101645/101645 co-relation queries the response was YES. [2023-09-01 01:15:07,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72173 conditions, 16901 events. 9133/16901 cut-off events. For 101645/101645 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 136553 event pairs, 468 based on Foata normal form. 594/17495 useless extension candidates. Maximal degree in co-relation 72110. Up to 3339 conditions per place. [2023-09-01 01:15:07,458 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 138 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2023-09-01 01:15:07,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 2236 flow [2023-09-01 01:15:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:15:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:15:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1461 transitions. [2023-09-01 01:15:07,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328888888888889 [2023-09-01 01:15:07,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1461 transitions. [2023-09-01 01:15:07,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1461 transitions. [2023-09-01 01:15:07,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:07,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1461 transitions. [2023-09-01 01:15:07,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.33333333333334) internal successors, (1461), 9 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:07,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:07,465 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:07,465 INFO L175 Difference]: Start difference. First operand has 139 places, 101 transitions, 1287 flow. Second operand 9 states and 1461 transitions. [2023-09-01 01:15:07,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 2236 flow [2023-09-01 01:15:07,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 188 transitions, 2220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:15:07,617 INFO L231 Difference]: Finished difference. Result has 148 places, 113 transitions, 1565 flow [2023-09-01 01:15:07,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1565, PETRI_PLACES=148, PETRI_TRANSITIONS=113} [2023-09-01 01:15:07,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2023-09-01 01:15:07,618 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 113 transitions, 1565 flow [2023-09-01 01:15:07,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.5) internal successors, (1830), 12 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:07,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:07,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:15:07,627 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 [2023-09-01 01:15:07,821 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 [2023-09-01 01:15:07,821 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:15:07,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1238207822, now seen corresponding path program 2 times [2023-09-01 01:15:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:07,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644996005] [2023-09-01 01:15:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:15:07,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:15:07,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:07,824 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) [2023-09-01 01:15:07,827 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 [2023-09-01 01:15:07,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:15:07,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:15:07,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:15:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:07,986 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:15:07,986 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 27 [2023-09-01 01:15:08,033 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:15:08,034 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 [2023-09-01 01:15:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:15:08,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:15:08,114 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:15:08,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:15:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:15:08,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:15:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:15:10,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:10,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644996005] [2023-09-01 01:15:10,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644996005] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:15:10,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:15:10,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:15:10,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725145498] [2023-09-01 01:15:10,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:15:10,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:15:10,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:10,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:15:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:15:14,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:15:18,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:15:20,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:15:23,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:15:26,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:15:28,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:15:28,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2023-09-01 01:15:28,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 113 transitions, 1565 flow. Second operand has 12 states, 12 states have (on average 139.83333333333334) internal successors, (1678), 12 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:28,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:28,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2023-09-01 01:15:28,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:33,388 INFO L130 PetriNetUnfolder]: 10870/20006 cut-off events. [2023-09-01 01:15:33,388 INFO L131 PetriNetUnfolder]: For 151467/151467 co-relation queries the response was YES. [2023-09-01 01:15:33,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88467 conditions, 20006 events. 10870/20006 cut-off events. For 151467/151467 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 170683 event pairs, 3168 based on Foata normal form. 1170/21176 useless extension candidates. Maximal degree in co-relation 88399. Up to 7205 conditions per place. [2023-09-01 01:15:33,531 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 229 selfloop transitions, 35 changer transitions 0/264 dead transitions. [2023-09-01 01:15:33,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 264 transitions, 3188 flow [2023-09-01 01:15:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:15:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:15:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1677 transitions. [2023-09-01 01:15:33,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40654545454545454 [2023-09-01 01:15:33,535 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1677 transitions. [2023-09-01 01:15:33,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1677 transitions. [2023-09-01 01:15:33,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:33,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1677 transitions. [2023-09-01 01:15:33,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 152.45454545454547) internal successors, (1677), 11 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:33,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:33,539 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:33,539 INFO L175 Difference]: Start difference. First operand has 148 places, 113 transitions, 1565 flow. Second operand 11 states and 1677 transitions. [2023-09-01 01:15:33,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 264 transitions, 3188 flow [2023-09-01 01:15:33,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 264 transitions, 3101 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-09-01 01:15:33,825 INFO L231 Difference]: Finished difference. Result has 158 places, 118 transitions, 1652 flow [2023-09-01 01:15:33,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1652, PETRI_PLACES=158, PETRI_TRANSITIONS=118} [2023-09-01 01:15:33,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2023-09-01 01:15:33,825 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 118 transitions, 1652 flow [2023-09-01 01:15:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 139.83333333333334) internal successors, (1678), 12 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:33,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:33,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:15:33,834 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 [2023-09-01 01:15:34,026 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 [2023-09-01 01:15:34,026 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:15:34,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:34,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1238207789, now seen corresponding path program 1 times [2023-09-01 01:15:34,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:34,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60073924] [2023-09-01 01:15:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:15:34,027 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 [2023-09-01 01:15:34,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:34,028 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) [2023-09-01 01:15:34,029 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 [2023-09-01 01:15:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:15:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:15:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:34,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:15:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:15:34,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:15:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:15:35,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:35,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60073924] [2023-09-01 01:15:35,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60073924] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:15:35,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:15:35,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:15:35,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430474717] [2023-09-01 01:15:35,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:15:35,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:15:35,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:15:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:15:36,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-09-01 01:15:36,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 118 transitions, 1652 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:36,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:36,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-09-01 01:15:36,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:43,035 INFO L130 PetriNetUnfolder]: 14848/26684 cut-off events. [2023-09-01 01:15:43,035 INFO L131 PetriNetUnfolder]: For 214103/214103 co-relation queries the response was YES. [2023-09-01 01:15:43,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132024 conditions, 26684 events. 14848/26684 cut-off events. For 214103/214103 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 225949 event pairs, 3168 based on Foata normal form. 1782/28466 useless extension candidates. Maximal degree in co-relation 131952. Up to 7604 conditions per place. [2023-09-01 01:15:43,379 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 162 selfloop transitions, 49 changer transitions 0/211 dead transitions. [2023-09-01 01:15:43,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 3003 flow [2023-09-01 01:15:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:15:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:15:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1459 transitions. [2023-09-01 01:15:43,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322962962962963 [2023-09-01 01:15:43,383 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1459 transitions. [2023-09-01 01:15:43,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1459 transitions. [2023-09-01 01:15:43,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:43,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1459 transitions. [2023-09-01 01:15:43,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.11111111111111) internal successors, (1459), 9 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:43,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:43,386 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:43,386 INFO L175 Difference]: Start difference. First operand has 158 places, 118 transitions, 1652 flow. Second operand 9 states and 1459 transitions. [2023-09-01 01:15:43,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 3003 flow [2023-09-01 01:15:44,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 211 transitions, 2915 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-09-01 01:15:44,141 INFO L231 Difference]: Finished difference. Result has 165 places, 121 transitions, 1744 flow [2023-09-01 01:15:44,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1744, PETRI_PLACES=165, PETRI_TRANSITIONS=121} [2023-09-01 01:15:44,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2023-09-01 01:15:44,142 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 121 transitions, 1744 flow [2023-09-01 01:15:44,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:44,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:44,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:15:44,159 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 (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:15:44,354 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 [2023-09-01 01:15:44,354 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:15:44,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -270260317, now seen corresponding path program 3 times [2023-09-01 01:15:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:44,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024694311] [2023-09-01 01:15:44,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:15:44,355 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 [2023-09-01 01:15:44,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:44,356 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) [2023-09-01 01:15:44,357 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 [2023-09-01 01:15:44,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:15:44,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:15:44,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:15:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:15:44,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:15:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:15:44,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024694311] [2023-09-01 01:15:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024694311] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:15:44,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:15:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-09-01 01:15:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098272187] [2023-09-01 01:15:44,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:15:44,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:15:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:15:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:15:45,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-09-01 01:15:45,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 121 transitions, 1744 flow. Second operand has 13 states, 13 states have (on average 153.69230769230768) internal successors, (1998), 13 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:45,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:15:45,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-09-01 01:15:45,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:15:50,536 INFO L130 PetriNetUnfolder]: 13870/25058 cut-off events. [2023-09-01 01:15:50,536 INFO L131 PetriNetUnfolder]: For 230789/230789 co-relation queries the response was YES. [2023-09-01 01:15:50,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127487 conditions, 25058 events. 13870/25058 cut-off events. For 230789/230789 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 212611 event pairs, 3168 based on Foata normal form. 66/25124 useless extension candidates. Maximal degree in co-relation 127412. Up to 13009 conditions per place. [2023-09-01 01:15:50,797 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 156 selfloop transitions, 59 changer transitions 0/215 dead transitions. [2023-09-01 01:15:50,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 215 transitions, 2997 flow [2023-09-01 01:15:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:15:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:15:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1766 transitions. [2023-09-01 01:15:50,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281212121212121 [2023-09-01 01:15:50,801 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1766 transitions. [2023-09-01 01:15:50,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1766 transitions. [2023-09-01 01:15:50,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:15:50,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1766 transitions. [2023-09-01 01:15:50,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 160.54545454545453) internal successors, (1766), 11 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:50,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:50,804 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:50,804 INFO L175 Difference]: Start difference. First operand has 165 places, 121 transitions, 1744 flow. Second operand 11 states and 1766 transitions. [2023-09-01 01:15:50,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 215 transitions, 2997 flow [2023-09-01 01:15:52,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 215 transitions, 2870 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-09-01 01:15:52,144 INFO L231 Difference]: Finished difference. Result has 169 places, 123 transitions, 1796 flow [2023-09-01 01:15:52,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1796, PETRI_PLACES=169, PETRI_TRANSITIONS=123} [2023-09-01 01:15:52,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2023-09-01 01:15:52,144 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 123 transitions, 1796 flow [2023-09-01 01:15:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.69230769230768) internal successors, (1998), 13 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:15:52,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:15:52,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 01:15:52,154 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 [2023-09-01 01:15:52,345 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 [2023-09-01 01:15:52,346 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:15:52,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:15:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash -312446599, now seen corresponding path program 3 times [2023-09-01 01:15:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:15:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188080341] [2023-09-01 01:15:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:15:52,346 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 [2023-09-01 01:15:52,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:15:52,347 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) [2023-09-01 01:15:52,349 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 [2023-09-01 01:15:52,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:15:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:15:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 01:15:52,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:15:52,523 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:15:52,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 01:15:52,560 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:15:52,561 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 [2023-09-01 01:15:52,683 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-09-01 01:15:52,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-09-01 01:15:52,722 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:15:52,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:15:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:15:53,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:15:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:15:59,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:15:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188080341] [2023-09-01 01:15:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188080341] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:15:59,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:15:59,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 01:15:59,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320481183] [2023-09-01 01:15:59,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:15:59,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:15:59,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:15:59,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:15:59,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:16:14,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:16:48,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 375 [2023-09-01 01:16:48,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 123 transitions, 1796 flow. Second operand has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:16:48,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:16:48,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 375 [2023-09-01 01:16:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:17:20,444 INFO L130 PetriNetUnfolder]: 14552/26587 cut-off events. [2023-09-01 01:17:20,444 INFO L131 PetriNetUnfolder]: For 228911/228911 co-relation queries the response was YES. [2023-09-01 01:17:20,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126512 conditions, 26587 events. 14552/26587 cut-off events. For 228911/228911 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 231034 event pairs, 7047 based on Foata normal form. 68/26655 useless extension candidates. Maximal degree in co-relation 126438. Up to 7111 conditions per place. [2023-09-01 01:17:20,905 INFO L137 encePairwiseOnDemand]: 363/375 looper letters, 274 selfloop transitions, 122 changer transitions 1/397 dead transitions. [2023-09-01 01:17:20,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 397 transitions, 5031 flow [2023-09-01 01:17:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 01:17:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 01:17:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3450 transitions. [2023-09-01 01:17:20,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2023-09-01 01:17:20,911 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3450 transitions. [2023-09-01 01:17:20,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3450 transitions. [2023-09-01 01:17:20,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:17:20,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3450 transitions. [2023-09-01 01:17:20,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 143.75) internal successors, (3450), 24 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:20,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:20,921 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:20,921 INFO L175 Difference]: Start difference. First operand has 169 places, 123 transitions, 1796 flow. Second operand 24 states and 3450 transitions. [2023-09-01 01:17:20,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 397 transitions, 5031 flow [2023-09-01 01:17:21,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 397 transitions, 4824 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-09-01 01:17:21,314 INFO L231 Difference]: Finished difference. Result has 191 places, 192 transitions, 3006 flow [2023-09-01 01:17:21,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3006, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2023-09-01 01:17:21,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2023-09-01 01:17:21,315 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 3006 flow [2023-09-01 01:17:21,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:21,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:17:21,315 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 01:17:21,323 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 [2023-09-01 01:17:21,516 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 [2023-09-01 01:17:21,516 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:17:21,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:17:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1000527962, now seen corresponding path program 3 times [2023-09-01 01:17:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:17:21,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107915950] [2023-09-01 01:17:21,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:17:21,517 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 [2023-09-01 01:17:21,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:17:21,518 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) [2023-09-01 01:17:21,519 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 [2023-09-01 01:17:21,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:17:21,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:17:21,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:17:21,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:17:21,765 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:17:21,765 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 [2023-09-01 01:17:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:17:22,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:17:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:17:25,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:17:25,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107915950] [2023-09-01 01:17:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107915950] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:17:25,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:17:25,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 01:17:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221799593] [2023-09-01 01:17:25,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:17:25,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 01:17:25,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:17:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 01:17:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 01:17:48,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-09-01 01:17:48,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 3006 flow. Second operand has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:17:48,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:17:48,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-09-01 01:17:48,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:18:01,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:03,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:05,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:07,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:09,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:11,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:13,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:15,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:17,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:18:19,179 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 [] [2023-09-01 01:18:33,536 INFO L130 PetriNetUnfolder]: 19595/35700 cut-off events. [2023-09-01 01:18:33,536 INFO L131 PetriNetUnfolder]: For 318946/318946 co-relation queries the response was YES. [2023-09-01 01:18:33,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175953 conditions, 35700 events. 19595/35700 cut-off events. For 318946/318946 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 317890 event pairs, 15934 based on Foata normal form. 24/35724 useless extension candidates. Maximal degree in co-relation 175875. Up to 5583 conditions per place. [2023-09-01 01:18:33,871 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 569 selfloop transitions, 74 changer transitions 0/643 dead transitions. [2023-09-01 01:18:33,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 643 transitions, 9467 flow [2023-09-01 01:18:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 01:18:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 01:18:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3940 transitions. [2023-09-01 01:18:33,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43777777777777777 [2023-09-01 01:18:33,879 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3940 transitions. [2023-09-01 01:18:33,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3940 transitions. [2023-09-01 01:18:33,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:18:33,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3940 transitions. [2023-09-01 01:18:33,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 164.16666666666666) internal successors, (3940), 24 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:33,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:33,890 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:33,890 INFO L175 Difference]: Start difference. First operand has 191 places, 192 transitions, 3006 flow. Second operand 24 states and 3940 transitions. [2023-09-01 01:18:33,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 643 transitions, 9467 flow [2023-09-01 01:18:35,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 643 transitions, 9211 flow, removed 99 selfloop flow, removed 8 redundant places. [2023-09-01 01:18:35,169 INFO L231 Difference]: Finished difference. Result has 219 places, 223 transitions, 3442 flow [2023-09-01 01:18:35,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3442, PETRI_PLACES=219, PETRI_TRANSITIONS=223} [2023-09-01 01:18:35,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2023-09-01 01:18:35,170 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 223 transitions, 3442 flow [2023-09-01 01:18:35,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:35,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:18:35,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:18:35,178 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 [2023-09-01 01:18:35,371 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 [2023-09-01 01:18:35,371 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:18:35,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:18:35,371 INFO L85 PathProgramCache]: Analyzing trace with hash 213159507, now seen corresponding path program 4 times [2023-09-01 01:18:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:18:35,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278267555] [2023-09-01 01:18:35,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:18:35,372 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 [2023-09-01 01:18:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:18:35,373 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) [2023-09-01 01:18:35,374 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 [2023-09-01 01:18:35,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:18:35,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:18:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:18:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:18:35,632 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:18:35,632 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 [2023-09-01 01:18:35,791 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 [2023-09-01 01:18:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:18:36,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:18:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:18:36,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:18:36,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278267555] [2023-09-01 01:18:36,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278267555] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:18:36,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:18:36,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:18:36,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829837394] [2023-09-01 01:18:36,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:18:36,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:18:36,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:18:36,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:18:36,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:18:41,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-09-01 01:18:41,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 223 transitions, 3442 flow. Second operand has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:41,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:18:41,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-09-01 01:18:41,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:18:52,492 INFO L130 PetriNetUnfolder]: 25305/46758 cut-off events. [2023-09-01 01:18:52,492 INFO L131 PetriNetUnfolder]: For 428559/428559 co-relation queries the response was YES. [2023-09-01 01:18:53,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221515 conditions, 46758 events. 25305/46758 cut-off events. For 428559/428559 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 441667 event pairs, 17033 based on Foata normal form. 1408/48166 useless extension candidates. Maximal degree in co-relation 221427. Up to 32924 conditions per place. [2023-09-01 01:18:53,422 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 399 selfloop transitions, 21 changer transitions 0/420 dead transitions. [2023-09-01 01:18:53,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 420 transitions, 6495 flow [2023-09-01 01:18:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:18:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:18:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1845 transitions. [2023-09-01 01:18:53,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-09-01 01:18:53,425 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1845 transitions. [2023-09-01 01:18:53,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1845 transitions. [2023-09-01 01:18:53,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:18:53,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1845 transitions. [2023-09-01 01:18:53,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.75) internal successors, (1845), 12 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:53,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:53,431 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:53,431 INFO L175 Difference]: Start difference. First operand has 219 places, 223 transitions, 3442 flow. Second operand 12 states and 1845 transitions. [2023-09-01 01:18:53,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 420 transitions, 6495 flow [2023-09-01 01:18:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 420 transitions, 6260 flow, removed 47 selfloop flow, removed 10 redundant places. [2023-09-01 01:18:54,564 INFO L231 Difference]: Finished difference. Result has 224 places, 229 transitions, 3453 flow [2023-09-01 01:18:54,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3270, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3453, PETRI_PLACES=224, PETRI_TRANSITIONS=229} [2023-09-01 01:18:54,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2023-09-01 01:18:54,566 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 229 transitions, 3453 flow [2023-09-01 01:18:54,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:54,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:18:54,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:18:54,575 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 [2023-09-01 01:18:54,772 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 [2023-09-01 01:18:54,773 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:18:54,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:18:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1615660288, now seen corresponding path program 1 times [2023-09-01 01:18:54,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:18:54,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124965268] [2023-09-01 01:18:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:18:54,774 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 [2023-09-01 01:18:54,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:18:54,775 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) [2023-09-01 01:18:54,776 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 [2023-09-01 01:18:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:18:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:18:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:18:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:18:54,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:18:54,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:18:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124965268] [2023-09-01 01:18:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124965268] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:18:54,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:18:54,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:18:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352361983] [2023-09-01 01:18:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:18:54,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:18:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:18:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:18:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:18:55,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-09-01 01:18:55,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 229 transitions, 3453 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:18:55,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:18:55,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-09-01 01:18:55,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:19:02,448 INFO L130 PetriNetUnfolder]: 20997/38778 cut-off events. [2023-09-01 01:19:02,448 INFO L131 PetriNetUnfolder]: For 342999/342999 co-relation queries the response was YES. [2023-09-01 01:19:02,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189120 conditions, 38778 events. 20997/38778 cut-off events. For 342999/342999 co-relation queries the response was YES. Maximal size of possible extension queue 1299. Compared 351901 event pairs, 7754 based on Foata normal form. 100/38878 useless extension candidates. Maximal degree in co-relation 189027. Up to 35772 conditions per place. [2023-09-01 01:19:02,976 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 216 selfloop transitions, 30 changer transitions 12/258 dead transitions. [2023-09-01 01:19:02,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 258 transitions, 4308 flow [2023-09-01 01:19:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:19:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:19:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-09-01 01:19:02,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791111111111111 [2023-09-01 01:19:02,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-09-01 01:19:02,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-09-01 01:19:02,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:19:02,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-09-01 01:19:02,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:02,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:02,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:02,980 INFO L175 Difference]: Start difference. First operand has 224 places, 229 transitions, 3453 flow. Second operand 3 states and 539 transitions. [2023-09-01 01:19:02,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 258 transitions, 4308 flow [2023-09-01 01:19:04,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 258 transitions, 4290 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 01:19:04,121 INFO L231 Difference]: Finished difference. Result has 224 places, 238 transitions, 3644 flow [2023-09-01 01:19:04,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3644, PETRI_PLACES=224, PETRI_TRANSITIONS=238} [2023-09-01 01:19:04,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2023-09-01 01:19:04,122 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 238 transitions, 3644 flow [2023-09-01 01:19:04,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:04,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:19:04,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 01:19:04,130 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 [2023-09-01 01:19:04,324 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 [2023-09-01 01:19:04,324 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:19:04,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:19:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash 170973225, now seen corresponding path program 4 times [2023-09-01 01:19:04,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:19:04,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135349559] [2023-09-01 01:19:04,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:19:04,326 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 [2023-09-01 01:19:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:19:04,327 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) [2023-09-01 01:19:04,329 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 [2023-09-01 01:19:04,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:19:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:19:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:19:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:19:04,538 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:19:04,539 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 [2023-09-01 01:19:04,647 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 [2023-09-01 01:19:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:19:04,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:19:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:19:05,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:19:05,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135349559] [2023-09-01 01:19:05,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135349559] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:19:05,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:19:05,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:19:05,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277721248] [2023-09-01 01:19:05,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:19:05,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:19:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:19:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:19:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:19:09,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-09-01 01:19:09,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 238 transitions, 3644 flow. Second operand has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:09,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:19:09,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-09-01 01:19:09,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:19:18,291 INFO L130 PetriNetUnfolder]: 18150/33393 cut-off events. [2023-09-01 01:19:18,291 INFO L131 PetriNetUnfolder]: For 329633/329633 co-relation queries the response was YES. [2023-09-01 01:19:18,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166245 conditions, 33393 events. 18150/33393 cut-off events. For 329633/329633 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 299038 event pairs, 13207 based on Foata normal form. 252/33645 useless extension candidates. Maximal degree in co-relation 166150. Up to 27175 conditions per place. [2023-09-01 01:19:18,603 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 317 selfloop transitions, 31 changer transitions 11/359 dead transitions. [2023-09-01 01:19:18,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 359 transitions, 5297 flow [2023-09-01 01:19:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:19:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:19:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1840 transitions. [2023-09-01 01:19:18,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088888888888889 [2023-09-01 01:19:18,606 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1840 transitions. [2023-09-01 01:19:18,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1840 transitions. [2023-09-01 01:19:18,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:19:18,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1840 transitions. [2023-09-01 01:19:18,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:18,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:18,612 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:18,612 INFO L175 Difference]: Start difference. First operand has 224 places, 238 transitions, 3644 flow. Second operand 12 states and 1840 transitions. [2023-09-01 01:19:18,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 359 transitions, 5297 flow [2023-09-01 01:19:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 359 transitions, 5172 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-09-01 01:19:19,339 INFO L231 Difference]: Finished difference. Result has 231 places, 247 transitions, 3795 flow [2023-09-01 01:19:19,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3795, PETRI_PLACES=231, PETRI_TRANSITIONS=247} [2023-09-01 01:19:19,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2023-09-01 01:19:19,340 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 247 transitions, 3795 flow [2023-09-01 01:19:19,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:19,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:19:19,340 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:19:19,348 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 [2023-09-01 01:19:19,540 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 [2023-09-01 01:19:19,541 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:19:19,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:19:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1730117227, now seen corresponding path program 5 times [2023-09-01 01:19:19,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:19:19,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422865777] [2023-09-01 01:19:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:19:19,542 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 [2023-09-01 01:19:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:19:19,542 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) [2023-09-01 01:19:19,543 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 [2023-09-01 01:19:19,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 01:19:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:19:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:19:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:19:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:19:19,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:19:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:19:20,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:19:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422865777] [2023-09-01 01:19:20,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422865777] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:19:20,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:19:20,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-09-01 01:19:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863731498] [2023-09-01 01:19:20,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:19:20,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 01:19:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:19:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 01:19:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:19:23,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-09-01 01:19:23,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 247 transitions, 3795 flow. Second operand has 17 states, 17 states have (on average 153.47058823529412) internal successors, (2609), 17 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:23,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:19:23,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-09-01 01:19:23,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:19:31,619 INFO L130 PetriNetUnfolder]: 17331/32044 cut-off events. [2023-09-01 01:19:31,620 INFO L131 PetriNetUnfolder]: For 293122/293122 co-relation queries the response was YES. [2023-09-01 01:19:32,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157319 conditions, 32044 events. 17331/32044 cut-off events. For 293122/293122 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 285952 event pairs, 4446 based on Foata normal form. 140/32184 useless extension candidates. Maximal degree in co-relation 157221. Up to 14792 conditions per place. [2023-09-01 01:19:32,207 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 299 selfloop transitions, 112 changer transitions 0/411 dead transitions. [2023-09-01 01:19:32,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 411 transitions, 6425 flow [2023-09-01 01:19:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:19:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:19:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2407 transitions. [2023-09-01 01:19:32,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42791111111111113 [2023-09-01 01:19:32,211 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2407 transitions. [2023-09-01 01:19:32,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2407 transitions. [2023-09-01 01:19:32,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:19:32,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2407 transitions. [2023-09-01 01:19:32,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 160.46666666666667) internal successors, (2407), 15 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:32,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:32,218 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:32,219 INFO L175 Difference]: Start difference. First operand has 231 places, 247 transitions, 3795 flow. Second operand 15 states and 2407 transitions. [2023-09-01 01:19:32,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 411 transitions, 6425 flow [2023-09-01 01:19:33,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 411 transitions, 6400 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 01:19:33,152 INFO L231 Difference]: Finished difference. Result has 241 places, 261 transitions, 4249 flow [2023-09-01 01:19:33,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3770, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4249, PETRI_PLACES=241, PETRI_TRANSITIONS=261} [2023-09-01 01:19:33,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2023-09-01 01:19:33,153 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 261 transitions, 4249 flow [2023-09-01 01:19:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 153.47058823529412) internal successors, (2609), 17 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:33,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:19:33,153 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 01:19:33,162 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 [2023-09-01 01:19:33,354 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 [2023-09-01 01:19:33,354 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:19:33,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:19:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1687930945, now seen corresponding path program 5 times [2023-09-01 01:19:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:19:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146644337] [2023-09-01 01:19:33,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:19:33,355 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 [2023-09-01 01:19:33,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:19:33,356 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) [2023-09-01 01:19:33,357 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 [2023-09-01 01:19:33,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 01:19:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:19:33,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:19:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:19:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:19:33,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:19:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:19:34,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:19:34,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146644337] [2023-09-01 01:19:34,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146644337] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:19:34,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:19:34,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2023-09-01 01:19:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365126489] [2023-09-01 01:19:34,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:19:34,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 01:19:34,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:19:34,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 01:19:34,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-09-01 01:19:37,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-09-01 01:19:37,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 261 transitions, 4249 flow. Second operand has 18 states, 18 states have (on average 153.38888888888889) internal successors, (2761), 18 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:37,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:19:37,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-09-01 01:19:37,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:19:46,064 INFO L130 PetriNetUnfolder]: 16265/30048 cut-off events. [2023-09-01 01:19:46,065 INFO L131 PetriNetUnfolder]: For 322354/322354 co-relation queries the response was YES. [2023-09-01 01:19:46,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152006 conditions, 30048 events. 16265/30048 cut-off events. For 322354/322354 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 261254 event pairs, 3642 based on Foata normal form. 66/30114 useless extension candidates. Maximal degree in co-relation 151907. Up to 14441 conditions per place. [2023-09-01 01:19:46,422 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 235 selfloop transitions, 103 changer transitions 0/338 dead transitions. [2023-09-01 01:19:46,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 338 transitions, 5238 flow [2023-09-01 01:19:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:19:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:19:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2252 transitions. [2023-09-01 01:19:46,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428952380952381 [2023-09-01 01:19:46,426 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2252 transitions. [2023-09-01 01:19:46,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2252 transitions. [2023-09-01 01:19:46,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:19:46,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2252 transitions. [2023-09-01 01:19:46,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.85714285714286) internal successors, (2252), 14 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:46,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:46,431 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:46,431 INFO L175 Difference]: Start difference. First operand has 241 places, 261 transitions, 4249 flow. Second operand 14 states and 2252 transitions. [2023-09-01 01:19:46,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 338 transitions, 5238 flow [2023-09-01 01:19:47,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 338 transitions, 4990 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-09-01 01:19:47,253 INFO L231 Difference]: Finished difference. Result has 246 places, 242 transitions, 3933 flow [2023-09-01 01:19:47,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3933, PETRI_PLACES=246, PETRI_TRANSITIONS=242} [2023-09-01 01:19:47,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2023-09-01 01:19:47,254 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 242 transitions, 3933 flow [2023-09-01 01:19:47,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 153.38888888888889) internal successors, (2761), 18 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:19:47,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:19:47,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:19:47,267 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 [2023-09-01 01:19:47,464 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 [2023-09-01 01:19:47,464 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:19:47,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:19:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2095321227, now seen corresponding path program 6 times [2023-09-01 01:19:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:19:47,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764298879] [2023-09-01 01:19:47,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:19:47,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:19:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:19:47,466 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) [2023-09-01 01:19:47,468 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 [2023-09-01 01:19:47,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 01:19:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:19:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:19:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:19:47,733 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:19:47,733 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 27 [2023-09-01 01:19:47,822 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:19:47,822 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 [2023-09-01 01:19:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:19:48,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:19:48,028 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:19:48,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:19:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:19:48,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:19:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:19:52,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:19:52,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764298879] [2023-09-01 01:19:52,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764298879] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:19:52,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:19:52,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 01:19:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060564358] [2023-09-01 01:19:52,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:19:52,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:19:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:19:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:19:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:19:54,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:19:56,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:00,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:03,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:08,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:13,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:17,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:19,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:23,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:25,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:25,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 375 [2023-09-01 01:20:25,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 242 transitions, 3933 flow. Second operand has 16 states, 16 states have (on average 135.625) internal successors, (2170), 16 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:20:25,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:20:25,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 375 [2023-09-01 01:20:25,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:20:40,221 INFO L130 PetriNetUnfolder]: 15489/28712 cut-off events. [2023-09-01 01:20:40,221 INFO L131 PetriNetUnfolder]: For 315942/315942 co-relation queries the response was YES. [2023-09-01 01:20:40,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141132 conditions, 28712 events. 15489/28712 cut-off events. For 315942/315942 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 253796 event pairs, 5902 based on Foata normal form. 560/29272 useless extension candidates. Maximal degree in co-relation 141035. Up to 11525 conditions per place. [2023-09-01 01:20:40,542 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 445 selfloop transitions, 84 changer transitions 0/529 dead transitions. [2023-09-01 01:20:40,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 529 transitions, 7253 flow [2023-09-01 01:20:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 01:20:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 01:20:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3359 transitions. [2023-09-01 01:20:40,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894492753623188 [2023-09-01 01:20:40,548 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3359 transitions. [2023-09-01 01:20:40,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3359 transitions. [2023-09-01 01:20:40,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:20:40,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3359 transitions. [2023-09-01 01:20:40,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 146.04347826086956) internal successors, (3359), 23 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:20:40,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:20:40,558 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:20:40,558 INFO L175 Difference]: Start difference. First operand has 246 places, 242 transitions, 3933 flow. Second operand 23 states and 3359 transitions. [2023-09-01 01:20:40,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 529 transitions, 7253 flow [2023-09-01 01:20:41,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 529 transitions, 7120 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-09-01 01:20:41,633 INFO L231 Difference]: Finished difference. Result has 264 places, 243 transitions, 4002 flow [2023-09-01 01:20:41,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3819, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4002, PETRI_PLACES=264, PETRI_TRANSITIONS=243} [2023-09-01 01:20:41,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2023-09-01 01:20:41,633 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 243 transitions, 4002 flow [2023-09-01 01:20:41,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 135.625) internal successors, (2170), 16 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:20:41,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:20:41,634 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 01:20:41,644 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 [2023-09-01 01:20:41,840 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 [2023-09-01 01:20:41,841 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:20:41,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:20:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2053134945, now seen corresponding path program 6 times [2023-09-01 01:20:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:20:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538693466] [2023-09-01 01:20:41,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:20:41,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:20:41,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:20:41,843 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) [2023-09-01 01:20:41,843 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 [2023-09-01 01:20:42,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 01:20:42,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:20:42,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:20:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:20:42,111 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:20:42,112 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 27 [2023-09-01 01:20:42,179 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:20:42,180 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 [2023-09-01 01:20:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:20:42,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:20:42,345 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:20:42,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:20:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:20:42,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:20:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:20:46,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:20:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538693466] [2023-09-01 01:20:46,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538693466] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:20:46,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:20:46,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-09-01 01:20:46,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339914950] [2023-09-01 01:20:46,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:20:46,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 01:20:46,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:20:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 01:20:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:20:49,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:20:56,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:21:08,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:21:14,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:21:18,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2023-09-01 01:21:18,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 243 transitions, 4002 flow. Second operand has 17 states, 17 states have (on average 139.52941176470588) internal successors, (2372), 17 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:18,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:21:18,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2023-09-01 01:21:18,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:21:31,897 INFO L130 PetriNetUnfolder]: 15105/28072 cut-off events. [2023-09-01 01:21:31,898 INFO L131 PetriNetUnfolder]: For 288487/288487 co-relation queries the response was YES. [2023-09-01 01:21:32,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138137 conditions, 28072 events. 15105/28072 cut-off events. For 288487/288487 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 244956 event pairs, 5242 based on Foata normal form. 256/28328 useless extension candidates. Maximal degree in co-relation 138039. Up to 7319 conditions per place. [2023-09-01 01:21:32,241 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 380 selfloop transitions, 103 changer transitions 0/483 dead transitions. [2023-09-01 01:21:32,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 483 transitions, 6623 flow [2023-09-01 01:21:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 01:21:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 01:21:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3151 transitions. [2023-09-01 01:21:32,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001269841269841 [2023-09-01 01:21:32,245 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3151 transitions. [2023-09-01 01:21:32,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3151 transitions. [2023-09-01 01:21:32,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:21:32,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3151 transitions. [2023-09-01 01:21:32,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 150.04761904761904) internal successors, (3151), 21 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:32,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:32,253 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:32,253 INFO L175 Difference]: Start difference. First operand has 264 places, 243 transitions, 4002 flow. Second operand 21 states and 3151 transitions. [2023-09-01 01:21:32,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 483 transitions, 6623 flow [2023-09-01 01:21:32,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 483 transitions, 6225 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-09-01 01:21:32,887 INFO L231 Difference]: Finished difference. Result has 272 places, 254 transitions, 4213 flow [2023-09-01 01:21:32,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4213, PETRI_PLACES=272, PETRI_TRANSITIONS=254} [2023-09-01 01:21:32,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2023-09-01 01:21:32,888 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 254 transitions, 4213 flow [2023-09-01 01:21:32,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 139.52941176470588) internal successors, (2372), 17 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:32,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:21:32,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:21:32,897 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 (35)] Ended with exit code 0 [2023-09-01 01:21:33,089 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 [2023-09-01 01:21:33,089 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:21:33,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:21:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash 227944711, now seen corresponding path program 1 times [2023-09-01 01:21:33,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:21:33,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123752721] [2023-09-01 01:21:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:21:33,090 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 [2023-09-01 01:21:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:21:33,091 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) [2023-09-01 01:21:33,091 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 [2023-09-01 01:21:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:21:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:21:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:21:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:21:33,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:21:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:21:33,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:21:33,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123752721] [2023-09-01 01:21:33,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123752721] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:21:33,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:21:33,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 01:21:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206986972] [2023-09-01 01:21:33,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:21:33,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:21:33,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:21:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:21:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:21:35,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-09-01 01:21:35,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 254 transitions, 4213 flow. Second operand has 12 states, 12 states have (on average 150.91666666666666) internal successors, (1811), 12 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:35,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:21:35,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-09-01 01:21:35,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:21:43,607 INFO L130 PetriNetUnfolder]: 14881/27589 cut-off events. [2023-09-01 01:21:43,607 INFO L131 PetriNetUnfolder]: For 241657/241657 co-relation queries the response was YES. [2023-09-01 01:21:43,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135076 conditions, 27589 events. 14881/27589 cut-off events. For 241657/241657 co-relation queries the response was YES. Maximal size of possible extension queue 918. Compared 237950 event pairs, 2187 based on Foata normal form. 130/27719 useless extension candidates. Maximal degree in co-relation 134976. Up to 10457 conditions per place. [2023-09-01 01:21:43,867 INFO L137 encePairwiseOnDemand]: 363/375 looper letters, 228 selfloop transitions, 125 changer transitions 2/355 dead transitions. [2023-09-01 01:21:43,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 355 transitions, 5734 flow [2023-09-01 01:21:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:21:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:21:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2498 transitions. [2023-09-01 01:21:43,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41633333333333333 [2023-09-01 01:21:43,870 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2498 transitions. [2023-09-01 01:21:43,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2498 transitions. [2023-09-01 01:21:43,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:21:43,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2498 transitions. [2023-09-01 01:21:43,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 156.125) internal successors, (2498), 16 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:43,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:43,875 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:43,875 INFO L175 Difference]: Start difference. First operand has 272 places, 254 transitions, 4213 flow. Second operand 16 states and 2498 transitions. [2023-09-01 01:21:43,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 355 transitions, 5734 flow [2023-09-01 01:21:44,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 355 transitions, 5595 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-09-01 01:21:44,708 INFO L231 Difference]: Finished difference. Result has 284 places, 258 transitions, 4564 flow [2023-09-01 01:21:44,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4564, PETRI_PLACES=284, PETRI_TRANSITIONS=258} [2023-09-01 01:21:44,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2023-09-01 01:21:44,708 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 258 transitions, 4564 flow [2023-09-01 01:21:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.91666666666666) internal successors, (1811), 12 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:44,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:21:44,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:21:44,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2023-09-01 01:21:44,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:21:44,909 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:21:44,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:21:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash 530451462, now seen corresponding path program 7 times [2023-09-01 01:21:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:21:44,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165213759] [2023-09-01 01:21:44,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:21:44,910 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 [2023-09-01 01:21:44,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:21:44,911 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:21:44,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-09-01 01:21:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:21:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:21:45,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:21:45,170 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:21:45,170 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 [2023-09-01 01:21:45,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-09-01 01:21:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:21:45,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:21:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:21:46,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:21:46,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165213759] [2023-09-01 01:21:46,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165213759] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:21:46,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:21:46,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 01:21:46,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605017361] [2023-09-01 01:21:46,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:21:46,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 01:21:46,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:21:46,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 01:21:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-09-01 01:21:54,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-09-01 01:21:54,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 258 transitions, 4564 flow. Second operand has 18 states, 18 states have (on average 145.55555555555554) internal successors, (2620), 18 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:21:54,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:21:54,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-09-01 01:21:54,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:22:04,380 INFO L130 PetriNetUnfolder]: 17909/33571 cut-off events. [2023-09-01 01:22:04,380 INFO L131 PetriNetUnfolder]: For 365184/365184 co-relation queries the response was YES. [2023-09-01 01:22:04,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174369 conditions, 33571 events. 17909/33571 cut-off events. For 365184/365184 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 306299 event pairs, 10074 based on Foata normal form. 992/34563 useless extension candidates. Maximal degree in co-relation 174264. Up to 17001 conditions per place. [2023-09-01 01:22:04,913 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 458 selfloop transitions, 46 changer transitions 0/504 dead transitions. [2023-09-01 01:22:04,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 504 transitions, 8775 flow [2023-09-01 01:22:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 01:22:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 01:22:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2607 transitions. [2023-09-01 01:22:04,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40894117647058825 [2023-09-01 01:22:04,918 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2607 transitions. [2023-09-01 01:22:04,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2607 transitions. [2023-09-01 01:22:04,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:22:04,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2607 transitions. [2023-09-01 01:22:04,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 153.35294117647058) internal successors, (2607), 17 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:22:04,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 375.0) internal successors, (6750), 18 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:22:04,925 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 375.0) internal successors, (6750), 18 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:22:04,925 INFO L175 Difference]: Start difference. First operand has 284 places, 258 transitions, 4564 flow. Second operand 17 states and 2607 transitions. [2023-09-01 01:22:04,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 504 transitions, 8775 flow [2023-09-01 01:22:08,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 504 transitions, 8351 flow, removed 145 selfloop flow, removed 14 redundant places. [2023-09-01 01:22:08,230 INFO L231 Difference]: Finished difference. Result has 289 places, 261 transitions, 4472 flow [2023-09-01 01:22:08,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4472, PETRI_PLACES=289, PETRI_TRANSITIONS=261} [2023-09-01 01:22:08,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2023-09-01 01:22:08,231 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 261 transitions, 4472 flow [2023-09-01 01:22:08,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.55555555555554) internal successors, (2620), 18 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:22:08,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:22:08,232 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-09-01 01:22:08,243 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 (37)] Forceful destruction successful, exit code 0 [2023-09-01 01:22:08,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:22:08,443 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:22:08,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:22:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1011839140, now seen corresponding path program 1 times [2023-09-01 01:22:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:22:08,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101592244] [2023-09-01 01:22:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:22:08,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:22:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:22:08,445 INFO L229 MonitoredProcess]: Starting monitored process 38 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) [2023-09-01 01:22:08,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-09-01 01:22:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:22:08,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 01:22:08,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:22:08,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 01:22:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:22:09,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:22:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:22:14,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:22:14,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101592244] [2023-09-01 01:22:14,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101592244] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:22:14,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:22:14,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-09-01 01:22:14,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995009468] [2023-09-01 01:22:14,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:22:14,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 01:22:14,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:22:14,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 01:22:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-09-01 01:22:58,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-09-01 01:22:58,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 261 transitions, 4472 flow. Second operand has 30 states, 30 states have (on average 150.03333333333333) internal successors, (4501), 30 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:22:58,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:22:58,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-09-01 01:22:58,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:23:09,448 WARN L222 SmtUtils]: Spent 6.85s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:23:11,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:13,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:15,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:17,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:19,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:21,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:23,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:25,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:27,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:29,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:31,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:33,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:35,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:23:41,396 WARN L222 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:24:36,044 INFO L130 PetriNetUnfolder]: 51353/95686 cut-off events. [2023-09-01 01:24:36,044 INFO L131 PetriNetUnfolder]: For 856325/856325 co-relation queries the response was YES. [2023-09-01 01:24:37,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486989 conditions, 95686 events. 51353/95686 cut-off events. For 856325/856325 co-relation queries the response was YES. Maximal size of possible extension queue 1885. Compared 952418 event pairs, 44025 based on Foata normal form. 75/95761 useless extension candidates. Maximal degree in co-relation 486887. Up to 16678 conditions per place. [2023-09-01 01:24:37,946 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 1598 selfloop transitions, 88 changer transitions 0/1686 dead transitions. [2023-09-01 01:24:37,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1686 transitions, 29500 flow [2023-09-01 01:24:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 01:24:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 01:24:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5039 transitions. [2023-09-01 01:24:37,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479111111111111 [2023-09-01 01:24:37,956 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5039 transitions. [2023-09-01 01:24:37,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5039 transitions. [2023-09-01 01:24:37,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:24:37,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5039 transitions. [2023-09-01 01:24:37,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 167.96666666666667) internal successors, (5039), 30 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:24:37,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 375.0) internal successors, (11625), 31 states have internal predecessors, (11625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:24:37,970 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 375.0) internal successors, (11625), 31 states have internal predecessors, (11625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:24:37,970 INFO L175 Difference]: Start difference. First operand has 289 places, 261 transitions, 4472 flow. Second operand 30 states and 5039 transitions. [2023-09-01 01:24:37,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1686 transitions, 29500 flow [2023-09-01 01:24:47,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1686 transitions, 29228 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-09-01 01:24:47,956 INFO L231 Difference]: Finished difference. Result has 328 places, 282 transitions, 5092 flow [2023-09-01 01:24:47,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5092, PETRI_PLACES=328, PETRI_TRANSITIONS=282} [2023-09-01 01:24:47,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2023-09-01 01:24:47,957 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 282 transitions, 5092 flow [2023-09-01 01:24:47,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 150.03333333333333) internal successors, (4501), 30 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:24:47,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:24:47,958 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:24:47,966 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 (38)] Forceful destruction successful, exit code 0 [2023-09-01 01:24:48,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:24:48,159 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:24:48,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:24:48,159 INFO L85 PathProgramCache]: Analyzing trace with hash 552117251, now seen corresponding path program 8 times [2023-09-01 01:24:48,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:24:48,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703712932] [2023-09-01 01:24:48,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:24:48,160 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 [2023-09-01 01:24:48,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:24:48,160 INFO L229 MonitoredProcess]: Starting monitored process 39 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) [2023-09-01 01:24:48,162 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 (39)] Waiting until timeout for monitored process [2023-09-01 01:24:48,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:24:48,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:24:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:24:48,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:24:48,445 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:24:48,446 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 [2023-09-01 01:24:48,517 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:24:48,517 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 [2023-09-01 01:24:48,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:24:48,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:24:48,678 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:24:48,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 01:24:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-09-01 01:24:48,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:24:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-09-01 01:24:50,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:24:50,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703712932] [2023-09-01 01:24:50,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703712932] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:24:50,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:24:50,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:24:50,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187425549] [2023-09-01 01:24:50,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:24:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:24:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:24:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:24:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:25:02,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 375 [2023-09-01 01:25:02,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 282 transitions, 5092 flow. Second operand has 14 states, 14 states have (on average 148.85714285714286) internal successors, (2084), 14 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:25:02,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:25:02,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 375 [2023-09-01 01:25:02,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:25:46,133 INFO L130 PetriNetUnfolder]: 87017/160726 cut-off events. [2023-09-01 01:25:46,134 INFO L131 PetriNetUnfolder]: For 1492669/1492669 co-relation queries the response was YES. [2023-09-01 01:25:49,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789014 conditions, 160726 events. 87017/160726 cut-off events. For 1492669/1492669 co-relation queries the response was YES. Maximal size of possible extension queue 3058. Compared 1667748 event pairs, 10861 based on Foata normal form. 10416/171142 useless extension candidates. Maximal degree in co-relation 788895. Up to 25606 conditions per place. [2023-09-01 01:25:49,931 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 540 selfloop transitions, 78 changer transitions 0/618 dead transitions. [2023-09-01 01:25:49,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 618 transitions, 11412 flow [2023-09-01 01:25:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 01:25:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 01:25:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2079 transitions. [2023-09-01 01:25:49,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42646153846153845 [2023-09-01 01:25:49,935 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2079 transitions. [2023-09-01 01:25:49,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2079 transitions. [2023-09-01 01:25:49,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:25:49,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2079 transitions. [2023-09-01 01:25:49,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:25:49,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:25:49,941 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:25:49,941 INFO L175 Difference]: Start difference. First operand has 328 places, 282 transitions, 5092 flow. Second operand 13 states and 2079 transitions. [2023-09-01 01:25:49,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 618 transitions, 11412 flow [2023-09-01 01:26:10,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 618 transitions, 11135 flow, removed 16 selfloop flow, removed 23 redundant places. [2023-09-01 01:26:10,273 INFO L231 Difference]: Finished difference. Result has 323 places, 287 transitions, 5013 flow [2023-09-01 01:26:10,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5013, PETRI_PLACES=323, PETRI_TRANSITIONS=287} [2023-09-01 01:26:10,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2023-09-01 01:26:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 287 transitions, 5013 flow [2023-09-01 01:26:10,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 148.85714285714286) internal successors, (2084), 14 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:26:10,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:26:10,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:26:10,285 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 (39)] Forceful destruction successful, exit code 0 [2023-09-01 01:26:10,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:26:10,477 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 01:26:10,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:26:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1526758319, now seen corresponding path program 1 times [2023-09-01 01:26:10,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:26:10,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469391521] [2023-09-01 01:26:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:26:10,478 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 [2023-09-01 01:26:10,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:26:10,479 INFO L229 MonitoredProcess]: Starting monitored process 40 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) [2023-09-01 01:26:10,480 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 (40)] Waiting until timeout for monitored process [2023-09-01 01:26:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:26:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 01:26:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:26:10,685 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 [2023-09-01 01:26:11,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:26:11,264 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 38 treesize of output 34 [2023-09-01 01:26:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:26:11,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:26:11,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:26:11,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2023-09-01 01:26:11,733 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 01:26:11,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2023-09-01 01:26:13,481 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_int| c_~A~0.base)) (.cse7 (bvmul (_ bv4 32) c_~i_AB~0))) (let ((.cse0 (forall ((~B~0.offset (_ BitVec 32)) (~B~0.base (_ BitVec 32)) (~A~0.offset (_ BitVec 32)) (v_ArrVal_1311 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1311) ~B~0.base))) (concat (concat (concat (select .cse9 (bvadd (_ bv3 32) .cse7 ~B~0.offset)) (select .cse9 (bvadd (_ bv2 32) .cse7 ~B~0.offset))) (select .cse9 (bvadd .cse7 ~B~0.offset (_ bv1 32)))) (select .cse9 (bvadd .cse7 ~B~0.offset)))) (concat (concat (concat (select .cse8 (bvadd ~A~0.offset (_ bv3 32) .cse7)) (select .cse8 (bvadd ~A~0.offset (_ bv2 32) .cse7))) (select .cse8 (bvadd ~A~0.offset .cse7 (_ bv1 32)))) (select .cse8 (bvadd ~A~0.offset .cse7)))))))) (and (or .cse0 (bvslt c_~i_BA~0 c_~An~0)) (or (bvslt c_~i_BA~0 c_~Bn~0) .cse0) (forall ((~A~0.offset (_ BitVec 32))) (let ((.cse2 (bvmul (_ bv4 32) c_~i_BA~0))) (let ((.cse1 (bvadd ~A~0.offset .cse2))) (or (not (bvule .cse1 (bvadd (_ bv4 32) ~A~0.offset .cse2))) (forall ((~B~0.offset (_ BitVec 32)) (~B~0.base (_ BitVec 32)) (v_ArrVal_1311 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1311))) (let ((.cse3 (bvadd .cse2 ~B~0.offset)) (.cse4 (select .cse6 ~B~0.base))) (or (not (bvule .cse3 (bvadd (_ bv4 32) .cse2 ~B~0.offset))) (= (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) .cse2 ~B~0.offset)) (select .cse4 (bvadd (_ bv2 32) .cse2 ~B~0.offset))) (select .cse4 (bvadd .cse2 ~B~0.offset (_ bv1 32)))) (select .cse4 .cse3)) (let ((.cse5 (select .cse6 c_~A~0.base))) (concat (concat (concat (select .cse5 (bvadd ~A~0.offset (_ bv3 32) .cse2)) (select .cse5 (bvadd ~A~0.offset (_ bv2 32) .cse2))) (select .cse5 (bvadd ~A~0.offset .cse2 (_ bv1 32)))) (select .cse5 .cse1)))) (not (= (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) .cse7 ~B~0.offset)) (select .cse4 (bvadd (_ bv2 32) .cse7 ~B~0.offset))) (select .cse4 (bvadd .cse7 ~B~0.offset (_ bv1 32)))) (select .cse4 (bvadd .cse7 ~B~0.offset))) (concat (concat (concat (select .cse8 (bvadd ~A~0.offset (_ bv3 32) .cse7)) (select .cse8 (bvadd ~A~0.offset (_ bv2 32) .cse7))) (select .cse8 (bvadd ~A~0.offset .cse7 (_ bv1 32)))) (select .cse8 (bvadd ~A~0.offset .cse7)))))))))))))))) is different from false [2023-09-01 01:26:14,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:26:14,278 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 678 treesize of output 669 [2023-09-01 01:26:14,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:26:14,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 468 treesize of output 459 [2023-09-01 01:26:14,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:26:14,692 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 306 treesize of output 198 Killed by 15