./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:54:06,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:54:06,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:54:06,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:54:06,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:54:06,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:54:06,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:54:06,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:54:06,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:54:06,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:54:06,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:54:06,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:54:06,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:54:06,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:54:06,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:54:06,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:54:06,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:54:06,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:54:06,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:54:06,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:54:06,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:54:06,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:54:06,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:54:06,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:54:06,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:54:06,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:54:06,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:54:06,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:54:06,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:54:06,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:54:06,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:54:06,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:54:06,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:54:06,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:54:06,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:54:06,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:54:06,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:54:06,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:54:06,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:54:06,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:54:06,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:54:06,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:54:06,751 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:54:06,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:54:06,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:54:06,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:54:06,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:54:06,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:54:06,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:54:06,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:54:06,754 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:54:06,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:54:06,755 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:54:06,755 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:54:06,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:54:06,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:54:06,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:54:06,756 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:54:06,756 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:54:06,756 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:54:06,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:54:06,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:54:06,757 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:54:06,757 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:54:06,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:54:06,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:54:06,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:54:06,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:06,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:54:06,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:54:06,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:54:06,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:54:06,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:54:06,759 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:54:06,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:54:06,760 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:54:06,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:54:07,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:54:07,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:54:07,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:54:07,062 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:54:07,062 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:54:07,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-29 23:54:08,132 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:54:08,352 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:54:08,353 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-29 23:54:08,358 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4c275a0/86eac41f690c4c13bf3e103ae2d66a1c/FLAGb95ed0412 [2023-08-29 23:54:08,368 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4c275a0/86eac41f690c4c13bf3e103ae2d66a1c [2023-08-29 23:54:08,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:54:08,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:54:08,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:08,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:54:08,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:54:08,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:08" (1/1) ... [2023-08-29 23:54:08,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9715d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:08, skipping insertion in model container [2023-08-29 23:54:08,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:08" (1/1) ... [2023-08-29 23:54:08,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:54:08,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:54:08,578 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2023-08-29 23:54:08,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:08,605 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:54:08,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39c49302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:08, skipping insertion in model container [2023-08-29 23:54:08,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:08,607 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:54:08,609 INFO L158 Benchmark]: Toolchain (without parser) took 237.36ms. Allocated memory is still 83.9MB. Free memory was 61.4MB in the beginning and 51.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:54:08,610 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 65.0MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:54:08,610 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.56ms. Allocated memory is still 83.9MB. Free memory was 61.1MB in the beginning and 51.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:54:08,612 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 65.0MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.56ms. Allocated memory is still 83.9MB. Free memory was 61.1MB in the beginning and 51.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:54:10,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:54:10,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:54:10,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:54:10,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:54:10,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:54:10,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:54:10,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:54:10,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:54:10,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:54:10,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:54:10,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:54:10,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:54:10,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:54:10,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:54:10,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:54:10,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:54:10,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:54:10,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:54:10,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:54:10,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:54:10,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:54:10,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:54:10,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:54:10,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:54:10,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:54:10,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:54:10,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:54:10,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:54:10,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:54:10,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:54:10,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:54:10,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:54:10,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:54:10,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:54:10,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:54:10,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:54:10,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:54:10,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:54:10,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:54:10,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:54:10,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:54:10,416 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:54:10,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:54:10,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:54:10,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:54:10,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:54:10,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:54:10,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:54:10,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:54:10,420 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:54:10,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:54:10,421 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:54:10,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:54:10,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:54:10,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:54:10,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:54:10,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:54:10,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:54:10,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:54:10,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:54:10,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:54:10,422 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:54:10,422 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:54:10,423 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:54:10,423 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:54:10,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:54:10,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:54:10,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:54:10,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:10,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:54:10,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:54:10,424 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:54:10,424 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:54:10,424 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:54:10,425 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:54:10,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:54:10,425 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:54:10,425 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:54:10,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:54:10,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:54:10,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:54:10,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:54:10,716 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:54:10,716 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:54:10,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-29 23:54:11,894 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:54:12,064 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:54:12,065 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-29 23:54:12,074 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ffdf2c7a/ad24ec2a652e400d97c09069d47bfb55/FLAGcd5702d6d [2023-08-29 23:54:12,083 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ffdf2c7a/ad24ec2a652e400d97c09069d47bfb55 [2023-08-29 23:54:12,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:54:12,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:54:12,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:12,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:54:12,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:54:12,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b19e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12, skipping insertion in model container [2023-08-29 23:54:12,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:54:12,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:54:12,242 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/popl20-bad-dot-product.wvr.c[2865,2878] [2023-08-29 23:54:12,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:12,261 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:54:12,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:54:12,279 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2023-08-29 23:54:12,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:12,290 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:54:12,310 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2023-08-29 23:54:12,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:12,334 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:54:12,334 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:54:12,339 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:54:12,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12 WrapperNode [2023-08-29 23:54:12,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:12,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:54:12,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:54:12,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:54:12,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,413 INFO L138 Inliner]: procedures = 28, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 272 [2023-08-29 23:54:12,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:54:12,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:54:12,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:54:12,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:54:12,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,466 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:54:12,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:54:12,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:54:12,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:54:12,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (1/1) ... [2023-08-29 23:54:12,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:54:12,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:54:12,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:54:12,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:54:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:54:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:54:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:54:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:54:12,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:54:12,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:54:12,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:54:12,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:54:12,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:54:12,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:54:12,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:54:12,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:54:12,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:54:12,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:54:12,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:54:12,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:54:12,554 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:54:12,720 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:54:12,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:54:13,215 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:54:13,357 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:54:13,358 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-29 23:54:13,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:54:13 BoogieIcfgContainer [2023-08-29 23:54:13,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:54:13,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:54:13,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:54:13,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:54:13,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:54:12" (1/3) ... [2023-08-29 23:54:13,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0251df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:54:13, skipping insertion in model container [2023-08-29 23:54:13,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:12" (2/3) ... [2023-08-29 23:54:13,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0251df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:54:13, skipping insertion in model container [2023-08-29 23:54:13,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:54:13" (3/3) ... [2023-08-29 23:54:13,368 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-08-29 23:54:13,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:54:13,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-29 23:54:13,380 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:54:13,463 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:54:13,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 272 transitions, 568 flow [2023-08-29 23:54:13,615 INFO L130 PetriNetUnfolder]: 25/269 cut-off events. [2023-08-29 23:54:13,619 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:54:13,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 269 events. 25/269 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 501 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-29 23:54:13,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 272 transitions, 568 flow [2023-08-29 23:54:13,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 265 transitions, 548 flow [2023-08-29 23:54:13,641 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:54:13,664 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 265 transitions, 548 flow [2023-08-29 23:54:13,666 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 265 transitions, 548 flow [2023-08-29 23:54:13,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 265 transitions, 548 flow [2023-08-29 23:54:13,718 INFO L130 PetriNetUnfolder]: 25/265 cut-off events. [2023-08-29 23:54:13,719 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:54:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 265 events. 25/265 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 499 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-29 23:54:13,729 INFO L119 LiptonReduction]: Number of co-enabled transitions 10608 [2023-08-29 23:54:37,026 INFO L134 LiptonReduction]: Checked pairs total: 13739 [2023-08-29 23:54:37,026 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-08-29 23:54:37,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:54:37,045 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;@617febe5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:54:37,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-08-29 23:54:37,047 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:54:37,048 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:54:37,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:37,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:54:37,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:54:37,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash 39463, now seen corresponding path program 1 times [2023-08-29 23:54:37,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:37,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449150867] [2023-08-29 23:54:37,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:37,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:37,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:37,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:37,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:54:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:54:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:37,362 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:54:37,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:54:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:54:37,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:54:37,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:37,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449150867] [2023-08-29 23:54:37,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449150867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:54:37,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:54:37,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:54:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460448258] [2023-08-29 23:54:37,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:54:37,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:54:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:54:37,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-29 23:54:37,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:37,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:37,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-29 23:54:37,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:39,647 INFO L130 PetriNetUnfolder]: 12164/15547 cut-off events. [2023-08-29 23:54:39,647 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2023-08-29 23:54:39,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31209 conditions, 15547 events. 12164/15547 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 1298. Compared 78142 event pairs, 7100 based on Foata normal form. 0/4608 useless extension candidates. Maximal degree in co-relation 28665. Up to 15394 conditions per place. [2023-08-29 23:54:39,731 INFO L137 encePairwiseOnDemand]: 558/562 looper letters, 56 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-08-29 23:54:39,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 264 flow [2023-08-29 23:54:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:54:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:54:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2023-08-29 23:54:39,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45195729537366547 [2023-08-29 23:54:39,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2023-08-29 23:54:39,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2023-08-29 23:54:39,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:39,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2023-08-29 23:54:39,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:39,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:39,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:39,772 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 156 flow. Second operand 3 states and 762 transitions. [2023-08-29 23:54:39,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 264 flow [2023-08-29 23:54:39,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 252 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:54:39,793 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 140 flow [2023-08-29 23:54:39,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-29 23:54:39,799 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-29 23:54:39,800 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 140 flow [2023-08-29 23:54:39,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:39,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:39,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:54:39,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-29 23:54:40,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:40,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:54:40,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash 39464, now seen corresponding path program 1 times [2023-08-29 23:54:40,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:40,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352388634] [2023-08-29 23:54:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:40,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:40,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:40,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:40,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:54:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:40,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:54:40,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:40,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:54:40,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:54:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:54:40,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:54:40,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:40,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352388634] [2023-08-29 23:54:40,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352388634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:54:40,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:54:40,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:54:40,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893784165] [2023-08-29 23:54:40,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:40,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:54:40,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:54:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:54:40,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-29 23:54:40,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:40,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:40,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-29 23:54:40,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:43,796 INFO L130 PetriNetUnfolder]: 24327/31091 cut-off events. [2023-08-29 23:54:43,797 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 23:54:43,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62062 conditions, 31091 events. 24327/31091 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 2557. Compared 168789 event pairs, 14200 based on Foata normal form. 0/9389 useless extension candidates. Maximal degree in co-relation 62056. Up to 15395 conditions per place. [2023-08-29 23:54:43,942 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 107 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2023-08-29 23:54:43,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 120 transitions, 476 flow [2023-08-29 23:54:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:54:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:54:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 815 transitions. [2023-08-29 23:54:43,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4833926453143535 [2023-08-29 23:54:43,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 815 transitions. [2023-08-29 23:54:43,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 815 transitions. [2023-08-29 23:54:43,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:43,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 815 transitions. [2023-08-29 23:54:43,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 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) [2023-08-29 23:54:43,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:43,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:43,955 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 140 flow. Second operand 3 states and 815 transitions. [2023-08-29 23:54:43,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 120 transitions, 476 flow [2023-08-29 23:54:43,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 120 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:54:43,959 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 171 flow [2023-08-29 23:54:43,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-08-29 23:54:43,960 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-08-29 23:54:43,960 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 171 flow [2023-08-29 23:54:43,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:43,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:43,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:54:43,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-29 23:54:44,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:44,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:54:44,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:44,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1227215, now seen corresponding path program 1 times [2023-08-29 23:54:44,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:44,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6101911] [2023-08-29 23:54:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:44,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:44,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:54:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:54:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:54:44,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:54:44,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:44,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6101911] [2023-08-29 23:54:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6101911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:54:44,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:54:44,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:54:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996885581] [2023-08-29 23:54:44,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:44,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:54:44,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:54:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:54:44,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-29 23:54:44,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:44,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:44,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-29 23:54:44,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:47,070 INFO L130 PetriNetUnfolder]: 24327/31094 cut-off events. [2023-08-29 23:54:47,070 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 23:54:47,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62086 conditions, 31094 events. 24327/31094 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 2596. Compared 170101 event pairs, 14200 based on Foata normal form. 2/9223 useless extension candidates. Maximal degree in co-relation 62077. Up to 30784 conditions per place. [2023-08-29 23:54:47,216 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 60 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-29 23:54:47,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 311 flow [2023-08-29 23:54:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:54:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:54:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1004 transitions. [2023-08-29 23:54:47,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661921708185054 [2023-08-29 23:54:47,220 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1004 transitions. [2023-08-29 23:54:47,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1004 transitions. [2023-08-29 23:54:47,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:47,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1004 transitions. [2023-08-29 23:54:47,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:47,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:47,228 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:47,228 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 171 flow. Second operand 4 states and 1004 transitions. [2023-08-29 23:54:47,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 311 flow [2023-08-29 23:54:47,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:54:47,231 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 176 flow [2023-08-29 23:54:47,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-29 23:54:47,232 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-29 23:54:47,232 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 176 flow [2023-08-29 23:54:47,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:47,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:47,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:54:47,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:54:47,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:47,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:54:47,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1225555, now seen corresponding path program 1 times [2023-08-29 23:54:47,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:47,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895859414] [2023-08-29 23:54:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:47,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:47,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:47,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:54:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:54:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:47,627 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:54:47,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:54:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:54:47,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:54:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:54:47,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895859414] [2023-08-29 23:54:47,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895859414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:54:47,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:54:47,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:54:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723526034] [2023-08-29 23:54:47,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:54:47,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:54:47,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:54:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:54:48,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 562 [2023-08-29 23:54:48,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:48,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:48,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 562 [2023-08-29 23:54:48,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:50,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:54:53,723 INFO L130 PetriNetUnfolder]: 36498/46653 cut-off events. [2023-08-29 23:54:53,724 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-29 23:54:53,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93168 conditions, 46653 events. 36498/46653 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 3819. Compared 266354 event pairs, 21300 based on Foata normal form. 0/14185 useless extension candidates. Maximal degree in co-relation 93158. Up to 15397 conditions per place. [2023-08-29 23:54:53,940 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 158 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2023-08-29 23:54:53,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 186 transitions, 818 flow [2023-08-29 23:54:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:54:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:54:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1527 transitions. [2023-08-29 23:54:53,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452846975088968 [2023-08-29 23:54:53,945 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1527 transitions. [2023-08-29 23:54:53,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1527 transitions. [2023-08-29 23:54:53,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:53,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1527 transitions. [2023-08-29 23:54:53,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 254.5) internal successors, (1527), 6 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:53,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:53,957 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:53,957 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 176 flow. Second operand 6 states and 1527 transitions. [2023-08-29 23:54:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 186 transitions, 818 flow [2023-08-29 23:54:53,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 186 transitions, 812 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:54:53,962 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 327 flow [2023-08-29 23:54:53,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2023-08-29 23:54:53,964 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2023-08-29 23:54:53,964 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 327 flow [2023-08-29 23:54:53,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:53,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:53,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:54:53,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-29 23:54:54,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:54,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:54:54,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash 37996036, now seen corresponding path program 1 times [2023-08-29 23:54:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119380568] [2023-08-29 23:54:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:54,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:54,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:54,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:54,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:54:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:54:54,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:54,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:54:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:54:54,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:54:54,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:54:54,366 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 23:54:54,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 23:54:54,396 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:54:54,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:54:54,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:54:54,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:54:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:54,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:54:54,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119380568] [2023-08-29 23:54:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119380568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:54:54,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:54:54,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:54:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110416746] [2023-08-29 23:54:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:54:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:54:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:54:54,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 562 [2023-08-29 23:54:54,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:54,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:54,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 562 [2023-08-29 23:54:54,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:54:57,551 INFO L130 PetriNetUnfolder]: 28099/36307 cut-off events. [2023-08-29 23:54:57,551 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-08-29 23:54:57,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72534 conditions, 36307 events. 28099/36307 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 206708 event pairs, 16278 based on Foata normal form. 0/11521 useless extension candidates. Maximal degree in co-relation 72519. Up to 35848 conditions per place. [2023-08-29 23:54:57,713 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 70 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-29 23:54:57,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 443 flow [2023-08-29 23:54:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:54:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:54:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2023-08-29 23:54:57,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45729537366548045 [2023-08-29 23:54:57,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2023-08-29 23:54:57,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2023-08-29 23:54:57,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:54:57,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2023-08-29 23:54:57,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:57,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:57,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:57,724 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 327 flow. Second operand 3 states and 771 transitions. [2023-08-29 23:54:57,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 443 flow [2023-08-29 23:54:57,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 424 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 23:54:57,727 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 284 flow [2023-08-29 23:54:57,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2023-08-29 23:54:57,729 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-29 23:54:57,729 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 284 flow [2023-08-29 23:54:57,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:57,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:54:57,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:54:57,741 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 (6)] Ended with exit code 0 [2023-08-29 23:54:57,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:57,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:54:57,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:54:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash 37996037, now seen corresponding path program 1 times [2023-08-29 23:54:57,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:54:57,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243261036] [2023-08-29 23:54:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:54:57,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:54:57,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:54:57,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:54:57,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:54:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:54:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:54:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:54:58,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:54:58,142 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 23:54:58,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 23:54:58,535 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-29 23:54:58,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-29 23:54:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:54:58,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:54:58,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:54:58,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243261036] [2023-08-29 23:54:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243261036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:54:58,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:54:58,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:54:58,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243398027] [2023-08-29 23:54:58,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:54:58,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:54:58,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:54:58,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:54:58,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:54:58,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-29 23:54:58,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:54:58,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:54:58,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-29 23:54:58,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:01,209 INFO L130 PetriNetUnfolder]: 19700/25961 cut-off events. [2023-08-29 23:55:01,209 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-29 23:55:01,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51815 conditions, 25961 events. 19700/25961 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 148946 event pairs, 11256 based on Foata normal form. 0/9199 useless extension candidates. Maximal degree in co-relation 51799. Up to 25502 conditions per place. [2023-08-29 23:55:01,300 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 66 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-29 23:55:01,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 392 flow [2023-08-29 23:55:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-08-29 23:55:01,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543297746144721 [2023-08-29 23:55:01,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-08-29 23:55:01,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-08-29 23:55:01,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:01,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-08-29 23:55:01,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:01,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:01,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:01,309 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 284 flow. Second operand 3 states and 766 transitions. [2023-08-29 23:55:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 392 flow [2023-08-29 23:55:01,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:01,311 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 259 flow [2023-08-29 23:55:01,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-29 23:55:01,312 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-29 23:55:01,312 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 259 flow [2023-08-29 23:55:01,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:01,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:01,313 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:55:01,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:01,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:55:01,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2142040856, now seen corresponding path program 2 times [2023-08-29 23:55:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403888478] [2023-08-29 23:55:01,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:55:01,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:01,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:01,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:01,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:55:01,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:55:01,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:01,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:55:01,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:01,713 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:01,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:01,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:02,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:02,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403888478] [2023-08-29 23:55:02,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403888478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:02,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:02,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:55:02,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49616299] [2023-08-29 23:55:02,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:02,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:55:02,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:55:02,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:55:06,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 562 [2023-08-29 23:55:06,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 259 flow. Second operand has 12 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:06,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:06,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 562 [2023-08-29 23:55:06,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:08,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:10,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:12,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:13,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:15,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:17,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:19,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:21,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:23,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:55:33,067 INFO L130 PetriNetUnfolder]: 65653/86503 cut-off events. [2023-08-29 23:55:33,067 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2023-08-29 23:55:33,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172548 conditions, 86503 events. 65653/86503 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 4030. Compared 548977 event pairs, 37520 based on Foata normal form. 14/31396 useless extension candidates. Maximal degree in co-relation 172531. Up to 8504 conditions per place. [2023-08-29 23:55:33,415 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 475 selfloop transitions, 34 changer transitions 0/518 dead transitions. [2023-08-29 23:55:33,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 518 transitions, 2351 flow [2023-08-29 23:55:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:55:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:55:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3683 transitions. [2023-08-29 23:55:33,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46809862735129637 [2023-08-29 23:55:33,424 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3683 transitions. [2023-08-29 23:55:33,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3683 transitions. [2023-08-29 23:55:33,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:33,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3683 transitions. [2023-08-29 23:55:33,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 263.07142857142856) internal successors, (3683), 14 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:33,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:33,442 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:33,443 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 259 flow. Second operand 14 states and 3683 transitions. [2023-08-29 23:55:33,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 518 transitions, 2351 flow [2023-08-29 23:55:33,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 518 transitions, 2350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:33,450 INFO L231 Difference]: Finished difference. Result has 96 places, 97 transitions, 528 flow [2023-08-29 23:55:33,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=528, PETRI_PLACES=96, PETRI_TRANSITIONS=97} [2023-08-29 23:55:33,451 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2023-08-29 23:55:33,451 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 97 transitions, 528 flow [2023-08-29 23:55:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:33,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:55:33,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:33,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:33,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:55:33,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2140486640, now seen corresponding path program 1 times [2023-08-29 23:55:33,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:33,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358185019] [2023-08-29 23:55:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:33,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:33,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:33,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:55:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:55:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:33,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:33,839 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 23:55:33,840 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 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 23:55:34,089 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-29 23:55:34,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-29 23:55:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:55:34,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:34,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:34,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358185019] [2023-08-29 23:55:34,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358185019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:34,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:34,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:34,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576789683] [2023-08-29 23:55:34,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:34,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:34,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-29 23:55:34,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 97 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:34,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:34,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-29 23:55:34,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:40,921 INFO L130 PetriNetUnfolder]: 63413/83453 cut-off events. [2023-08-29 23:55:40,921 INFO L131 PetriNetUnfolder]: For 462/462 co-relation queries the response was YES. [2023-08-29 23:55:41,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166574 conditions, 83453 events. 63413/83453 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 3528. Compared 524662 event pairs, 36180 based on Foata normal form. 0/30012 useless extension candidates. Maximal degree in co-relation 166547. Up to 81923 conditions per place. [2023-08-29 23:55:41,327 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 85 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2023-08-29 23:55:41,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 95 transitions, 696 flow [2023-08-29 23:55:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-08-29 23:55:41,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-08-29 23:55:41,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-08-29 23:55:41,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-08-29 23:55:41,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:41,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-08-29 23:55:41,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,335 INFO L175 Difference]: Start difference. First operand has 96 places, 97 transitions, 528 flow. Second operand 3 states and 764 transitions. [2023-08-29 23:55:41,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 95 transitions, 696 flow [2023-08-29 23:55:41,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 95 transitions, 635 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-29 23:55:41,339 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 465 flow [2023-08-29 23:55:41,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=465, PETRI_PLACES=92, PETRI_TRANSITIONS=95} [2023-08-29 23:55:41,340 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2023-08-29 23:55:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 465 flow [2023-08-29 23:55:41,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:41,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:55:41,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:41,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:41,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:55:41,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2140486642, now seen corresponding path program 1 times [2023-08-29 23:55:41,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:41,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542480519] [2023-08-29 23:55:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:41,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:41,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:41,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:55:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:55:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:41,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:41,714 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:55:41,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 23:55:41,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 23:55:41,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:41,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:55:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:55:41,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:41,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542480519] [2023-08-29 23:55:41,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542480519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:41,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:41,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:41,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950196059] [2023-08-29 23:55:41,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:41,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:41,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:41,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:42,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 562 [2023-08-29 23:55:42,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 465 flow. Second operand has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:42,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 562 [2023-08-29 23:55:42,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:48,722 INFO L130 PetriNetUnfolder]: 61173/80403 cut-off events. [2023-08-29 23:55:48,722 INFO L131 PetriNetUnfolder]: For 500/500 co-relation queries the response was YES. [2023-08-29 23:55:48,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160427 conditions, 80403 events. 61173/80403 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 3678. Compared 504130 event pairs, 34840 based on Foata normal form. 0/29393 useless extension candidates. Maximal degree in co-relation 160399. Up to 78873 conditions per place. [2023-08-29 23:55:49,082 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 83 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-08-29 23:55:49,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 93 transitions, 629 flow [2023-08-29 23:55:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-08-29 23:55:49,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45373665480427045 [2023-08-29 23:55:49,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-08-29 23:55:49,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-08-29 23:55:49,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:49,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-08-29 23:55:49,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,090 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 465 flow. Second operand 3 states and 765 transitions. [2023-08-29 23:55:49,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 93 transitions, 629 flow [2023-08-29 23:55:49,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 628 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:49,094 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 462 flow [2023-08-29 23:55:49,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2023-08-29 23:55:49,094 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-08-29 23:55:49,095 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 462 flow [2023-08-29 23:55:49,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:49,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:49,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:49,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:49,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:55:49,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1930586001, now seen corresponding path program 1 times [2023-08-29 23:55:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:49,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244125330] [2023-08-29 23:55:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:49,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:49,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:49,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:55:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:55:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:49,459 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:55:49,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:55:49,484 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:55:49,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:55:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:55:49,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:49,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244125330] [2023-08-29 23:55:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244125330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:49,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:49,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:49,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044119657] [2023-08-29 23:55:49,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:49,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:49,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:49,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-29 23:55:49,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 462 flow. Second operand has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:49,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-29 23:55:49,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:54,621 INFO L130 PetriNetUnfolder]: 41523/55043 cut-off events. [2023-08-29 23:55:54,622 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-08-29 23:55:54,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110318 conditions, 55043 events. 41523/55043 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 2449. Compared 333857 event pairs, 24330 based on Foata normal form. 0/22883 useless extension candidates. Maximal degree in co-relation 110289. Up to 54290 conditions per place. [2023-08-29 23:55:54,859 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 69 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2023-08-29 23:55:54,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 612 flow [2023-08-29 23:55:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:55:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:55:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 932 transitions. [2023-08-29 23:55:54,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41459074733096085 [2023-08-29 23:55:54,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 932 transitions. [2023-08-29 23:55:54,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 932 transitions. [2023-08-29 23:55:54,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:54,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 932 transitions. [2023-08-29 23:55:54,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,866 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,867 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 462 flow. Second operand 4 states and 932 transitions. [2023-08-29 23:55:54,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 612 flow [2023-08-29 23:55:54,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 87 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:54,870 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 473 flow [2023-08-29 23:55:54,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=473, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2023-08-29 23:55:54,871 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-08-29 23:55:54,871 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 473 flow [2023-08-29 23:55:54,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:54,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:54,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:55,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:55,073 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:55:55,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:55,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1930586000, now seen corresponding path program 1 times [2023-08-29 23:55:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754677358] [2023-08-29 23:55:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:55,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:55,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:55,081 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:55,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:55:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:55:55,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:55,278 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:55,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:55,359 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:55:55,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:55:55,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:55,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 23:55:55,454 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:55:55,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:55:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:55,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:59,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:59,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754677358] [2023-08-29 23:55:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754677358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:59,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:59,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:55:59,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568375807] [2023-08-29 23:55:59,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:59,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:55:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:55:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:56:03,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 562 [2023-08-29 23:56:03,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 473 flow. Second operand has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:03,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:03,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 562 [2023-08-29 23:56:03,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:32,638 INFO L130 PetriNetUnfolder]: 164525/219905 cut-off events. [2023-08-29 23:56:32,638 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-29 23:56:33,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441324 conditions, 219905 events. 164525/219905 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8252. Compared 1566117 event pairs, 43690 based on Foata normal form. 0/98373 useless extension candidates. Maximal degree in co-relation 441294. Up to 26052 conditions per place. [2023-08-29 23:56:34,012 INFO L137 encePairwiseOnDemand]: 550/562 looper letters, 934 selfloop transitions, 82 changer transitions 0/1020 dead transitions. [2023-08-29 23:56:34,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 1020 transitions, 4775 flow [2023-08-29 23:56:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-29 23:56:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-29 23:56:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 8386 transitions. [2023-08-29 23:56:34,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42633451957295376 [2023-08-29 23:56:34,026 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 8386 transitions. [2023-08-29 23:56:34,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 8386 transitions. [2023-08-29 23:56:34,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:34,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 8386 transitions. [2023-08-29 23:56:34,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 239.6) internal successors, (8386), 35 states have internal predecessors, (8386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:34,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 562.0) internal successors, (20232), 36 states have internal predecessors, (20232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:34,059 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 562.0) internal successors, (20232), 36 states have internal predecessors, (20232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:34,059 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 473 flow. Second operand 35 states and 8386 transitions. [2023-08-29 23:56:34,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 1020 transitions, 4775 flow [2023-08-29 23:56:34,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 1020 transitions, 4762 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:56:34,070 INFO L231 Difference]: Finished difference. Result has 126 places, 151 transitions, 966 flow [2023-08-29 23:56:34,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=966, PETRI_PLACES=126, PETRI_TRANSITIONS=151} [2023-08-29 23:56:34,071 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 55 predicate places. [2023-08-29 23:56:34,071 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 151 transitions, 966 flow [2023-08-29 23:56:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:34,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:34,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:34,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-29 23:56:34,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:34,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:56:34,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash 281702092, now seen corresponding path program 1 times [2023-08-29 23:56:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:34,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901324619] [2023-08-29 23:56:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:34,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:34,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:34,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:34,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:56:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:56:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:34,422 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:56:34,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 23:56:34,449 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:56:34,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:56:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:34,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:34,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:34,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901324619] [2023-08-29 23:56:34,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901324619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:34,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:34,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:56:34,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386910418] [2023-08-29 23:56:34,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:34,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:56:34,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:56:34,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:56:34,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-29 23:56:34,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 151 transitions, 966 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:34,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:34,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-29 23:56:34,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:53,971 INFO L130 PetriNetUnfolder]: 148965/198117 cut-off events. [2023-08-29 23:56:53,972 INFO L131 PetriNetUnfolder]: For 207280/213830 co-relation queries the response was YES. [2023-08-29 23:56:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457439 conditions, 198117 events. 148965/198117 cut-off events. For 207280/213830 co-relation queries the response was YES. Maximal size of possible extension queue 7734. Compared 1402536 event pairs, 92242 based on Foata normal form. 5240/110195 useless extension candidates. Maximal degree in co-relation 457401. Up to 196319 conditions per place. [2023-08-29 23:56:55,487 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 132 selfloop transitions, 1 changer transitions 0/149 dead transitions. [2023-08-29 23:56:55,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 149 transitions, 1228 flow [2023-08-29 23:56:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:56:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:56:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-29 23:56:55,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454329774614472 [2023-08-29 23:56:55,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-29 23:56:55,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-29 23:56:55,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:55,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-29 23:56:55,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:55,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:55,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:55,492 INFO L175 Difference]: Start difference. First operand has 126 places, 151 transitions, 966 flow. Second operand 3 states and 751 transitions. [2023-08-29 23:56:55,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 149 transitions, 1228 flow [2023-08-29 23:56:56,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 149 transitions, 1127 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-29 23:56:56,574 INFO L231 Difference]: Finished difference. Result has 122 places, 149 transitions, 863 flow [2023-08-29 23:56:56,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=863, PETRI_PLACES=122, PETRI_TRANSITIONS=149} [2023-08-29 23:56:56,575 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 51 predicate places. [2023-08-29 23:56:56,575 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 149 transitions, 863 flow [2023-08-29 23:56:56,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:56,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:56,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:56,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:56,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:56,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-29 23:56:56,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash 281702090, now seen corresponding path program 1 times [2023-08-29 23:56:56,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:56,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438569942] [2023-08-29 23:56:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:56,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:56,787 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:56,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:56:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:56,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:56:56,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:56,963 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-29 23:56:56,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-29 23:56:56,977 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 60 treesize of output 58 [2023-08-29 23:56:57,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:57,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:56:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:56:57,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:57,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:57,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438569942] [2023-08-29 23:56:57,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438569942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:57,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:57,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:56:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491251480] [2023-08-29 23:56:57,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:56:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:56:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:56:57,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 562 [2023-08-29 23:56:57,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 149 transitions, 863 flow. Second operand has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:57,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:57,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 562 [2023-08-29 23:56:57,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand