./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:45:43,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:45:43,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:45:43,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:45:43,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:45:43,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:45:43,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:45:43,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:45:43,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:45:43,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:45:43,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:45:43,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:45:43,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:45:43,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:45:43,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:45:43,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:45:43,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:45:43,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:45:43,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:45:43,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:45:43,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:45:43,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:45:43,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:45:43,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:45:43,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:45:43,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:45:43,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:45:43,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:45:43,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:45:43,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:45:43,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:45:43,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:45:43,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:45:43,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:45:43,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:45:43,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:45:43,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:45:43,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:45:43,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:45:43,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:45:43,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:45:43,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:45:43,665 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:45:43,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:45:43,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:45:43,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:45:43,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:45:43,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:45:43,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:45:43,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:45:43,669 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:45:43,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:45:43,670 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:45:43,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:45:43,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:45:43,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:45:43,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:45:43,671 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:45:43,671 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:45:43,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:45:43,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:45:43,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:45:43,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:45:43,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:45:43,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:45:43,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:45:43,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:45:43,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:45:43,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:45:43,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:45:43,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:45:43,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:45:43,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:45:43,674 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:45:43,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:45:43,675 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:45:43,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:45:43,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:45:43,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:45:43,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:45:43,984 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:45:43,985 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:45:43,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-09-01 02:45:45,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:45:45,461 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:45:45,462 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-09-01 02:45:45,471 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5f8e957/e3aaaaf537cb49b9856fd6c3077f2a64/FLAG9265df932 [2023-09-01 02:45:45,495 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5f8e957/e3aaaaf537cb49b9856fd6c3077f2a64 [2023-09-01 02:45:45,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:45:45,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:45:45,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:45,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:45:45,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:45:45,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:45" (1/1) ... [2023-09-01 02:45:45,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af7bd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:45, skipping insertion in model container [2023-09-01 02:45:45,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:45" (1/1) ... [2023-09-01 02:45:45,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:45:45,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:45:45,695 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] [2023-09-01 02:45:45,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:45,712 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:45:45,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@774b1b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:45, skipping insertion in model container [2023-09-01 02:45:45,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:45,714 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:45:45,715 INFO L158 Benchmark]: Toolchain (without parser) took 214.99ms. Allocated memory is still 86.0MB. Free memory was 63.8MB in the beginning and 53.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:45:45,716 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:45:45,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.09ms. Allocated memory is still 86.0MB. Free memory was 63.5MB in the beginning and 53.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:45:45,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.09ms. Allocated memory is still 86.0MB. Free memory was 63.5MB in the beginning and 53.6MB in the end (delta: 10.0MB). 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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:45:47,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:45:47,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:45:47,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:45:47,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:45:47,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:45:47,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:45:47,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:45:47,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:45:47,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:45:47,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:45:47,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:45:47,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:45:47,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:45:47,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:45:47,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:45:47,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:45:47,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:45:47,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:45:47,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:45:47,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:45:47,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:45:47,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:45:47,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:45:47,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:45:47,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:45:47,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:45:47,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:45:47,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:45:47,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:45:47,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:45:47,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:45:47,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:45:47,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:45:47,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:45:47,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:45:47,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:45:47,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:45:47,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:45:47,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:45:47,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:45:47,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:45:47,525 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:45:47,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:45:47,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:45:47,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:45:47,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:45:47,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:45:47,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:45:47,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:45:47,528 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:45:47,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:45:47,529 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:45:47,529 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:45:47,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:45:47,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:45:47,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:45:47,530 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:45:47,530 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:45:47,530 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:45:47,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:45:47,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:45:47,531 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:45:47,531 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:45:47,531 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:45:47,531 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:45:47,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:45:47,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:45:47,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:45:47,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:45:47,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:45:47,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:45:47,533 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:45:47,533 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:45:47,533 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:45:47,533 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:45:47,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:45:47,533 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:45:47,534 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:45:47,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:45:47,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:45:47,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:45:47,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:45:47,830 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:45:47,830 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:45:47,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-09-01 02:45:49,019 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:45:49,248 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:45:49,249 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-09-01 02:45:49,254 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa2fb040/79412074edc7408e91247d96eacb8156/FLAG2fbae8102 [2023-09-01 02:45:49,265 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa2fb040/79412074edc7408e91247d96eacb8156 [2023-09-01 02:45:49,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:45:49,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:45:49,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:49,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:45:49,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:45:49,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53edb378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49, skipping insertion in model container [2023-09-01 02:45:49,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:45:49,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:45:49,431 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] [2023-09-01 02:45:49,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:49,451 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:45:49,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:45:49,482 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] [2023-09-01 02:45:49,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:49,491 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:45:49,520 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] [2023-09-01 02:45:49,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:45:49,549 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:45:49,551 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:45:49,557 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:45:49,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49 WrapperNode [2023-09-01 02:45:49,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:45:49,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:45:49,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:45:49,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:45:49,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,642 INFO L138 Inliner]: procedures = 28, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 272 [2023-09-01 02:45:49,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:45:49,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:45:49,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:45:49,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:45:49,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:45:49,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:45:49,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:45:49,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:45:49,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (1/1) ... [2023-09-01 02:45:49,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:45:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:45:49,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:45:49,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:45:49,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:45:49,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:45:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:45:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:45:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:45:49,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:45:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:45:49,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:45:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:45:49,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:45:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:45:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:45:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:45:49,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:45:49,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:45:49,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:45:49,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:45:49,796 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:45:49,917 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:45:49,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:45:50,697 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:45:50,834 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:45:50,835 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-09-01 02:45:50,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:45:50 BoogieIcfgContainer [2023-09-01 02:45:50,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:45:50,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:45:50,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:45:50,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:45:50,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:45:49" (1/3) ... [2023-09-01 02:45:50,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d592498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:45:50, skipping insertion in model container [2023-09-01 02:45:50,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:45:49" (2/3) ... [2023-09-01 02:45:50,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d592498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:45:50, skipping insertion in model container [2023-09-01 02:45:50,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:45:50" (3/3) ... [2023-09-01 02:45:50,849 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-09-01 02:45:50,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:45:50,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-09-01 02:45:50,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:45:50,966 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:45:51,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 272 transitions, 568 flow [2023-09-01 02:45:51,134 INFO L130 PetriNetUnfolder]: 25/269 cut-off events. [2023-09-01 02:45:51,135 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:45:51,144 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. [2023-09-01 02:45:51,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 272 transitions, 568 flow [2023-09-01 02:45:51,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 265 transitions, 548 flow [2023-09-01 02:45:51,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:45:51,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 265 transitions, 548 flow [2023-09-01 02:45:51,184 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 265 transitions, 548 flow [2023-09-01 02:45:51,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 265 transitions, 548 flow [2023-09-01 02:45:51,241 INFO L130 PetriNetUnfolder]: 25/265 cut-off events. [2023-09-01 02:45:51,242 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:45:51,246 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. [2023-09-01 02:45:51,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 10608 [2023-09-01 02:46:15,470 INFO L134 LiptonReduction]: Checked pairs total: 13739 [2023-09-01 02:46:15,471 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-09-01 02:46:15,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:46:15,488 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;@458154ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:46:15,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-09-01 02:46:15,491 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:46:15,491 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:46:15,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:15,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:46:15,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:46:15,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash 39463, now seen corresponding path program 1 times [2023-09-01 02:46:15,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:15,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365959092] [2023-09-01 02:46:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:15,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:15,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:15,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:46:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:46:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:15,796 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:46:15,797 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 [2023-09-01 02:46:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:15,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:15,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365959092] [2023-09-01 02:46:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365959092] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:15,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:15,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:46:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194329296] [2023-09-01 02:46:15,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:46:15,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:46:15,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:46:16,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-09-01 02:46:16,054 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) [2023-09-01 02:46:16,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:16,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-09-01 02:46:16,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:18,220 INFO L130 PetriNetUnfolder]: 12164/15547 cut-off events. [2023-09-01 02:46:18,220 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2023-09-01 02:46:18,237 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. [2023-09-01 02:46:18,332 INFO L137 encePairwiseOnDemand]: 558/562 looper letters, 56 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-09-01 02:46:18,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 264 flow [2023-09-01 02:46:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2023-09-01 02:46:18,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45195729537366547 [2023-09-01 02:46:18,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2023-09-01 02:46:18,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2023-09-01 02:46:18,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:18,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2023-09-01 02:46:18,367 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) [2023-09-01 02:46:18,376 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) [2023-09-01 02:46:18,378 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) [2023-09-01 02:46:18,380 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 156 flow. Second operand 3 states and 762 transitions. [2023-09-01 02:46:18,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 264 flow [2023-09-01 02:46:18,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 252 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:46:18,406 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 140 flow [2023-09-01 02:46:18,407 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} [2023-09-01 02:46:18,410 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-09-01 02:46:18,411 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 140 flow [2023-09-01 02:46:18,411 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) [2023-09-01 02:46:18,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:18,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:46:18,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:18,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:18,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:46:18,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash 39464, now seen corresponding path program 1 times [2023-09-01 02:46:18,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:18,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752969177] [2023-09-01 02:46:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:18,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:18,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:18,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:18,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:46:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:46:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:18,850 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:46:18,851 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 [2023-09-01 02:46:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:18,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:18,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:18,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752969177] [2023-09-01 02:46:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752969177] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:18,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:46:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696313445] [2023-09-01 02:46:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:18,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:46:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:46:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:46:19,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-09-01 02:46:19,151 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) [2023-09-01 02:46:19,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:19,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-09-01 02:46:19,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:22,313 INFO L130 PetriNetUnfolder]: 24327/31091 cut-off events. [2023-09-01 02:46:22,314 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 02:46:22,342 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. [2023-09-01 02:46:22,500 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 107 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2023-09-01 02:46:22,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 120 transitions, 476 flow [2023-09-01 02:46:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 815 transitions. [2023-09-01 02:46:22,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4833926453143535 [2023-09-01 02:46:22,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 815 transitions. [2023-09-01 02:46:22,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 815 transitions. [2023-09-01 02:46:22,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:22,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 815 transitions. [2023-09-01 02:46:22,507 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) [2023-09-01 02:46:22,510 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) [2023-09-01 02:46:22,511 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) [2023-09-01 02:46:22,512 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 140 flow. Second operand 3 states and 815 transitions. [2023-09-01 02:46:22,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 120 transitions, 476 flow [2023-09-01 02:46:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 120 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:46:22,516 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 171 flow [2023-09-01 02:46:22,516 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} [2023-09-01 02:46:22,517 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-09-01 02:46:22,518 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 171 flow [2023-09-01 02:46:22,518 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) [2023-09-01 02:46:22,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:22,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:46:22,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:22,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:22,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:46:22,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1227215, now seen corresponding path program 1 times [2023-09-01 02:46:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:22,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643176481] [2023-09-01 02:46:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:22,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:22,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:22,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:22,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:46:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:22,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:46:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:22,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:22,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:22,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643176481] [2023-09-01 02:46:22,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643176481] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:22,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:22,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:46:22,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881189567] [2023-09-01 02:46:22,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:22,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:46:22,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:22,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:46:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:46:22,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-09-01 02:46:22,962 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) [2023-09-01 02:46:22,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:22,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-09-01 02:46:22,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:25,320 INFO L130 PetriNetUnfolder]: 24327/31094 cut-off events. [2023-09-01 02:46:25,320 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 02:46:25,351 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. [2023-09-01 02:46:25,507 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 60 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-09-01 02:46:25,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 311 flow [2023-09-01 02:46:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:46:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:46:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1004 transitions. [2023-09-01 02:46:25,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661921708185054 [2023-09-01 02:46:25,515 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1004 transitions. [2023-09-01 02:46:25,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1004 transitions. [2023-09-01 02:46:25,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:25,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1004 transitions. [2023-09-01 02:46:25,521 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) [2023-09-01 02:46:25,526 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) [2023-09-01 02:46:25,527 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) [2023-09-01 02:46:25,527 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 171 flow. Second operand 4 states and 1004 transitions. [2023-09-01 02:46:25,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 311 flow [2023-09-01 02:46:25,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:46:25,534 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 176 flow [2023-09-01 02:46:25,534 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} [2023-09-01 02:46:25,535 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-09-01 02:46:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 176 flow [2023-09-01 02:46:25,536 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) [2023-09-01 02:46:25,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:25,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:46:25,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:25,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:25,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:46:25,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1225555, now seen corresponding path program 1 times [2023-09-01 02:46:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:25,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931634468] [2023-09-01 02:46:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:25,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:25,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:25,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:25,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:46:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:25,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:46:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:25,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:46:25,945 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 [2023-09-01 02:46:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:26,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:46:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:26,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931634468] [2023-09-01 02:46:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931634468] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:46:26,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:46:26,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:46:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169640249] [2023-09-01 02:46:26,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:46:26,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:46:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:46:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:46:27,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 562 [2023-09-01 02:46:27,345 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) [2023-09-01 02:46:27,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:27,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 562 [2023-09-01 02:46:27,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:28,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:32,106 INFO L130 PetriNetUnfolder]: 36498/46653 cut-off events. [2023-09-01 02:46:32,107 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 02:46:32,149 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. [2023-09-01 02:46:32,292 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 158 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2023-09-01 02:46:32,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 186 transitions, 818 flow [2023-09-01 02:46:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:46:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:46:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1527 transitions. [2023-09-01 02:46:32,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452846975088968 [2023-09-01 02:46:32,297 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1527 transitions. [2023-09-01 02:46:32,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1527 transitions. [2023-09-01 02:46:32,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:32,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1527 transitions. [2023-09-01 02:46:32,302 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) [2023-09-01 02:46:32,307 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) [2023-09-01 02:46:32,309 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) [2023-09-01 02:46:32,309 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 176 flow. Second operand 6 states and 1527 transitions. [2023-09-01 02:46:32,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 186 transitions, 818 flow [2023-09-01 02:46:32,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 186 transitions, 812 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:46:32,313 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 327 flow [2023-09-01 02:46:32,314 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} [2023-09-01 02:46:32,314 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2023-09-01 02:46:32,314 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 327 flow [2023-09-01 02:46:32,315 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) [2023-09-01 02:46:32,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:32,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:46:32,325 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 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:32,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:32,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:46:32,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash 37996036, now seen corresponding path program 1 times [2023-09-01 02:46:32,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:32,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538811467] [2023-09-01 02:46:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:32,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:32,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:32,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:32,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:46:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:46:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:32,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:32,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:32,755 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 02:46:32,755 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 [2023-09-01 02:46:32,783 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:46:32,783 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 [2023-09-01 02:46:32,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:32,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:46:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:46:32,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:32,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:32,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538811467] [2023-09-01 02:46:32,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538811467] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:32,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:32,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:46:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429751024] [2023-09-01 02:46:32,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:32,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:46:32,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:32,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:46:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:46:33,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 562 [2023-09-01 02:46:33,200 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) [2023-09-01 02:46:33,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:33,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 562 [2023-09-01 02:46:33,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:35,784 INFO L130 PetriNetUnfolder]: 28099/36307 cut-off events. [2023-09-01 02:46:35,784 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-09-01 02:46:35,815 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. [2023-09-01 02:46:35,924 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 70 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-09-01 02:46:35,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 443 flow [2023-09-01 02:46:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2023-09-01 02:46:35,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45729537366548045 [2023-09-01 02:46:35,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2023-09-01 02:46:35,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2023-09-01 02:46:35,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:35,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2023-09-01 02:46:35,930 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) [2023-09-01 02:46:35,933 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) [2023-09-01 02:46:35,934 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) [2023-09-01 02:46:35,934 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 327 flow. Second operand 3 states and 771 transitions. [2023-09-01 02:46:35,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 443 flow [2023-09-01 02:46:35,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 424 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:46:35,937 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 284 flow [2023-09-01 02:46:35,937 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} [2023-09-01 02:46:35,938 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-09-01 02:46:35,938 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 284 flow [2023-09-01 02:46:35,939 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) [2023-09-01 02:46:35,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:35,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:46:35,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:36,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:36,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:46:36,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash 37996037, now seen corresponding path program 1 times [2023-09-01 02:46:36,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:36,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937476300] [2023-09-01 02:46:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:46:36,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:36,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:36,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:36,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:46:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:46:36,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:46:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:46:36,320 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 02:46:36,320 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 [2023-09-01 02:46:36,714 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-09-01 02:46:36,714 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 [2023-09-01 02:46:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:46:36,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:46:36,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937476300] [2023-09-01 02:46:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937476300] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:46:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:46:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:46:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264007344] [2023-09-01 02:46:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:46:36,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:46:36,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:46:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:46:37,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-09-01 02:46:37,085 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) [2023-09-01 02:46:37,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:37,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-09-01 02:46:37,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:38,998 INFO L130 PetriNetUnfolder]: 19700/25961 cut-off events. [2023-09-01 02:46:38,998 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-09-01 02:46:39,022 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. [2023-09-01 02:46:39,122 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 66 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-09-01 02:46:39,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 392 flow [2023-09-01 02:46:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:46:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:46:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-09-01 02:46:39,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543297746144721 [2023-09-01 02:46:39,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-09-01 02:46:39,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-09-01 02:46:39,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:46:39,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-09-01 02:46:39,130 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) [2023-09-01 02:46:39,132 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) [2023-09-01 02:46:39,133 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) [2023-09-01 02:46:39,133 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 284 flow. Second operand 3 states and 766 transitions. [2023-09-01 02:46:39,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 392 flow [2023-09-01 02:46:39,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:46:39,136 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 259 flow [2023-09-01 02:46:39,136 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} [2023-09-01 02:46:39,139 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-09-01 02:46:39,139 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 259 flow [2023-09-01 02:46:39,140 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) [2023-09-01 02:46:39,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:46:39,140 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:46:39,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:46:39,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:39,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:46:39,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:46:39,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2142040856, now seen corresponding path program 2 times [2023-09-01 02:46:39,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:46:39,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45264207] [2023-09-01 02:46:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:46:39,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:46:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:46:39,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:46:39,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:46:39,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:46:39,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:46:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:46:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:46:39,526 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:46:39,527 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 [2023-09-01 02:46:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:39,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:46:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:46:40,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:46:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45264207] [2023-09-01 02:46:40,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45264207] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:46:40,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:46:40,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:46:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8928319] [2023-09-01 02:46:40,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:46:40,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:46:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:46:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:46:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:46:44,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 562 [2023-09-01 02:46:44,683 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) [2023-09-01 02:46:44,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:46:44,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 562 [2023-09-01 02:46:44,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:46:47,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:49,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:50,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:52,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:53,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:55,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:56,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:57,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:46:59,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:00,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:47:10,711 INFO L130 PetriNetUnfolder]: 65653/86501 cut-off events. [2023-09-01 02:47:10,712 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2023-09-01 02:47:10,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172536 conditions, 86501 events. 65653/86501 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 4030. Compared 549000 event pairs, 37520 based on Foata normal form. 16/31396 useless extension candidates. Maximal degree in co-relation 172519. Up to 8504 conditions per place. [2023-09-01 02:47:11,099 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 475 selfloop transitions, 33 changer transitions 0/517 dead transitions. [2023-09-01 02:47:11,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 517 transitions, 2339 flow [2023-09-01 02:47:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:47:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:47:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3457 transitions. [2023-09-01 02:47:11,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473172734738571 [2023-09-01 02:47:11,109 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3457 transitions. [2023-09-01 02:47:11,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3457 transitions. [2023-09-01 02:47:11,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:11,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3457 transitions. [2023-09-01 02:47:11,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 265.9230769230769) internal successors, (3457), 13 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:11,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:11,128 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:47:11,128 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 259 flow. Second operand 13 states and 3457 transitions. [2023-09-01 02:47:11,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 517 transitions, 2339 flow [2023-09-01 02:47:11,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 517 transitions, 2338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:11,136 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 516 flow [2023-09-01 02:47:11,136 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=13, PETRI_FLOW=516, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2023-09-01 02:47:11,137 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 23 predicate places. [2023-09-01 02:47:11,137 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 516 flow [2023-09-01 02:47:11,138 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) [2023-09-01 02:47:11,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:11,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:47:11,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:11,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:11,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:47:11,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2140486640, now seen corresponding path program 1 times [2023-09-01 02:47:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:11,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899719979] [2023-09-01 02:47:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:11,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:11,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:11,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:11,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:47:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:47:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:11,508 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 02:47:11,509 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 [2023-09-01 02:47:11,778 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 02:47:11,778 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 [2023-09-01 02:47:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:47:11,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:11,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:11,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899719979] [2023-09-01 02:47:11,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899719979] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:11,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:11,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:47:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701914849] [2023-09-01 02:47:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:11,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:47:11,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:47:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:47:12,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-09-01 02:47:12,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 516 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) [2023-09-01 02:47:12,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:12,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-09-01 02:47:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:18,567 INFO L130 PetriNetUnfolder]: 63413/83451 cut-off events. [2023-09-01 02:47:18,567 INFO L131 PetriNetUnfolder]: For 432/432 co-relation queries the response was YES. [2023-09-01 02:47:18,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166553 conditions, 83451 events. 63413/83451 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 3528. Compared 524554 event pairs, 36180 based on Foata normal form. 0/30010 useless extension candidates. Maximal degree in co-relation 166527. Up to 81921 conditions per place. [2023-09-01 02:47:19,000 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 84 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-09-01 02:47:19,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 94 transitions, 682 flow [2023-09-01 02:47:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-09-01 02:47:19,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-09-01 02:47:19,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-09-01 02:47:19,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-09-01 02:47:19,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:19,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-09-01 02:47:19,005 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) [2023-09-01 02:47:19,008 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) [2023-09-01 02:47:19,008 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) [2023-09-01 02:47:19,008 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 516 flow. Second operand 3 states and 764 transitions. [2023-09-01 02:47:19,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 94 transitions, 682 flow [2023-09-01 02:47:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 622 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 02:47:19,012 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 454 flow [2023-09-01 02:47:19,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2023-09-01 02:47:19,013 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2023-09-01 02:47:19,013 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 454 flow [2023-09-01 02:47:19,014 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) [2023-09-01 02:47:19,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:19,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:47:19,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:19,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:19,224 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:47:19,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:19,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2140486642, now seen corresponding path program 1 times [2023-09-01 02:47:19,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:19,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199705642] [2023-09-01 02:47:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:19,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:19,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:47:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:19,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:47:19,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:19,390 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:47:19,391 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 [2023-09-01 02:47:19,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 02:47:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:19,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:47:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:47:19,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:19,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:19,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199705642] [2023-09-01 02:47:19,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199705642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:19,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:19,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:19,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332479404] [2023-09-01 02:47:19,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:19,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:19,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:19,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:19,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:19,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 562 [2023-09-01 02:47:19,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 454 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) [2023-09-01 02:47:19,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:19,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 562 [2023-09-01 02:47:19,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:26,214 INFO L130 PetriNetUnfolder]: 61173/80401 cut-off events. [2023-09-01 02:47:26,214 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-09-01 02:47:26,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160406 conditions, 80401 events. 61173/80401 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 3669. Compared 503835 event pairs, 34840 based on Foata normal form. 0/29391 useless extension candidates. Maximal degree in co-relation 160379. Up to 78871 conditions per place. [2023-09-01 02:47:26,649 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 82 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-09-01 02:47:26,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 616 flow [2023-09-01 02:47:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:47:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:47:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-09-01 02:47:26,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45373665480427045 [2023-09-01 02:47:26,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-09-01 02:47:26,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-09-01 02:47:26,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:26,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-09-01 02:47:26,654 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) [2023-09-01 02:47:26,656 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) [2023-09-01 02:47:26,656 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) [2023-09-01 02:47:26,657 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 454 flow. Second operand 3 states and 765 transitions. [2023-09-01 02:47:26,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 616 flow [2023-09-01 02:47:26,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:26,660 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 451 flow [2023-09-01 02:47:26,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=451, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2023-09-01 02:47:26,661 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2023-09-01 02:47:26,661 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 451 flow [2023-09-01 02:47:26,662 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) [2023-09-01 02:47:26,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:26,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:47:26,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:26,871 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:47:26,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1930586001, now seen corresponding path program 1 times [2023-09-01 02:47:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103001706] [2023-09-01 02:47:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:26,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:26,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:26,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:47:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:47:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:27,025 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:47:27,026 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 [2023-09-01 02:47:27,051 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:47:27,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:47:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:47:27,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:47:27,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103001706] [2023-09-01 02:47:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103001706] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:47:27,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:47:27,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:47:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89733960] [2023-09-01 02:47:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:47:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:47:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:47:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:47:27,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-09-01 02:47:27,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 451 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) [2023-09-01 02:47:27,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:27,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-09-01 02:47:27,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:47:32,175 INFO L130 PetriNetUnfolder]: 41523/55041 cut-off events. [2023-09-01 02:47:32,175 INFO L131 PetriNetUnfolder]: For 440/440 co-relation queries the response was YES. [2023-09-01 02:47:32,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110297 conditions, 55041 events. 41523/55041 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 2449. Compared 333651 event pairs, 24330 based on Foata normal form. 0/22881 useless extension candidates. Maximal degree in co-relation 110269. Up to 54288 conditions per place. [2023-09-01 02:47:32,465 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 68 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-09-01 02:47:32,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 599 flow [2023-09-01 02:47:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:47:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:47:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 932 transitions. [2023-09-01 02:47:32,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41459074733096085 [2023-09-01 02:47:32,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 932 transitions. [2023-09-01 02:47:32,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 932 transitions. [2023-09-01 02:47:32,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:47:32,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 932 transitions. [2023-09-01 02:47:32,471 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) [2023-09-01 02:47:32,473 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) [2023-09-01 02:47:32,474 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) [2023-09-01 02:47:32,474 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 451 flow. Second operand 4 states and 932 transitions. [2023-09-01 02:47:32,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 599 flow [2023-09-01 02:47:32,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:47:32,478 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 462 flow [2023-09-01 02:47:32,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=462, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-09-01 02:47:32,478 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-09-01 02:47:32,479 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 462 flow [2023-09-01 02:47:32,479 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) [2023-09-01 02:47:32,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:47:32,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:47:32,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:47:32,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:32,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:47:32,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:47:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1930586000, now seen corresponding path program 1 times [2023-09-01 02:47:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:47:32,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989059423] [2023-09-01 02:47:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:47:32,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:47:32,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:47:32,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:47:32,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:47:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:47:32,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:47:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:47:32,921 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:47:32,922 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 [2023-09-01 02:47:33,027 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:47:33,027 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 [2023-09-01 02:47:33,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:47:33,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:47:33,157 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:47:33,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:47:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:33,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:47:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:47:39,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:47:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989059423] [2023-09-01 02:47:39,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989059423] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:47:39,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:47:39,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:47:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337896166] [2023-09-01 02:47:39,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:47:39,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:47:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:47:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:47:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:47:42,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 562 [2023-09-01 02:47:42,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 462 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) [2023-09-01 02:47:42,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:47:42,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 562 [2023-09-01 02:47:42,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:12,020 INFO L130 PetriNetUnfolder]: 164525/219454 cut-off events. [2023-09-01 02:48:12,020 INFO L131 PetriNetUnfolder]: For 1407/1407 co-relation queries the response was YES. [2023-09-01 02:48:12,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440832 conditions, 219454 events. 164525/219454 cut-off events. For 1407/1407 co-relation queries the response was YES. Maximal size of possible extension queue 8297. Compared 1562416 event pairs, 43375 based on Foata normal form. 0/97914 useless extension candidates. Maximal degree in co-relation 440803. Up to 26052 conditions per place. [2023-09-01 02:48:13,482 INFO L137 encePairwiseOnDemand]: 550/562 looper letters, 934 selfloop transitions, 79 changer transitions 0/1017 dead transitions. [2023-09-01 02:48:13,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 1017 transitions, 4736 flow [2023-09-01 02:48:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 02:48:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 02:48:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 8386 transitions. [2023-09-01 02:48:13,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42633451957295376 [2023-09-01 02:48:13,495 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 8386 transitions. [2023-09-01 02:48:13,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 8386 transitions. [2023-09-01 02:48:13,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:13,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 8386 transitions. [2023-09-01 02:48:13,507 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) [2023-09-01 02:48:13,529 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) [2023-09-01 02:48:13,534 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) [2023-09-01 02:48:13,534 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 462 flow. Second operand 35 states and 8386 transitions. [2023-09-01 02:48:13,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 1017 transitions, 4736 flow [2023-09-01 02:48:13,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 1017 transitions, 4723 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:48:13,549 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 927 flow [2023-09-01 02:48:13,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=927, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2023-09-01 02:48:13,550 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 53 predicate places. [2023-09-01 02:48:13,550 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 927 flow [2023-09-01 02:48:13,551 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) [2023-09-01 02:48:13,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:13,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:13,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:48:13,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:13,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:48:13,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash 281702092, now seen corresponding path program 1 times [2023-09-01 02:48:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366093728] [2023-09-01 02:48:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:13,763 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:48:13,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:48:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:48:13,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:13,914 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 02:48:13,915 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 [2023-09-01 02:48:13,944 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:48:13,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:48:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:48:13,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:13,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:13,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366093728] [2023-09-01 02:48:13,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366093728] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:13,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:13,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:48:13,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303119559] [2023-09-01 02:48:13,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:13,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:48:13,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:48:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:48:14,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-09-01 02:48:14,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 927 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) [2023-09-01 02:48:14,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:14,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-09-01 02:48:14,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:33,993 INFO L130 PetriNetUnfolder]: 149015/198155 cut-off events. [2023-09-01 02:48:33,993 INFO L131 PetriNetUnfolder]: For 195936/202486 co-relation queries the response was YES. [2023-09-01 02:48:34,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457526 conditions, 198155 events. 149015/198155 cut-off events. For 195936/202486 co-relation queries the response was YES. Maximal size of possible extension queue 7650. Compared 1399456 event pairs, 92272 based on Foata normal form. 5240/110227 useless extension candidates. Maximal degree in co-relation 457489. Up to 196373 conditions per place. [2023-09-01 02:48:35,372 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 129 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2023-09-01 02:48:35,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 146 transitions, 1183 flow [2023-09-01 02:48:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-09-01 02:48:35,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454329774614472 [2023-09-01 02:48:35,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-09-01 02:48:35,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-09-01 02:48:35,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:35,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-09-01 02:48:35,375 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) [2023-09-01 02:48:35,376 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) [2023-09-01 02:48:35,376 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) [2023-09-01 02:48:35,377 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 927 flow. Second operand 3 states and 751 transitions. [2023-09-01 02:48:35,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 146 transitions, 1183 flow [2023-09-01 02:48:36,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 146 transitions, 1089 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-09-01 02:48:36,779 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 831 flow [2023-09-01 02:48:36,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=831, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2023-09-01 02:48:36,780 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 49 predicate places. [2023-09-01 02:48:36,780 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 831 flow [2023-09-01 02:48:36,780 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) [2023-09-01 02:48:36,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:36,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:36,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:48:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:36,992 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:48:36,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 281702090, now seen corresponding path program 1 times [2023-09-01 02:48:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:36,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881431232] [2023-09-01 02:48:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:36,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:36,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:36,994 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:48:36,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:48:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:37,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:48:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:48:37,170 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 02:48:37,170 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 [2023-09-01 02:48:37,186 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 [2023-09-01 02:48:37,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:48:37,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:48:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:48:37,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:37,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:37,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881431232] [2023-09-01 02:48:37,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881431232] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:37,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:37,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:48:37,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554342418] [2023-09-01 02:48:37,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:37,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:37,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:48:37,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 562 [2023-09-01 02:48:37,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 831 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) [2023-09-01 02:48:37,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:37,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 562 [2023-09-01 02:48:37,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:56,356 INFO L130 PetriNetUnfolder]: 142385/188783 cut-off events. [2023-09-01 02:48:56,356 INFO L131 PetriNetUnfolder]: For 182016/188166 co-relation queries the response was YES. [2023-09-01 02:48:57,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435139 conditions, 188783 events. 142385/188783 cut-off events. For 182016/188166 co-relation queries the response was YES. Maximal size of possible extension queue 7388. Compared 1322058 event pairs, 87782 based on Foata normal form. 4920/106281 useless extension candidates. Maximal degree in co-relation 435103. Up to 186985 conditions per place. [2023-09-01 02:48:57,848 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 127 selfloop transitions, 1 changer transitions 0/144 dead transitions. [2023-09-01 02:48:57,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 144 transitions, 1083 flow [2023-09-01 02:48:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-09-01 02:48:57,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460260972716489 [2023-09-01 02:48:57,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-09-01 02:48:57,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-09-01 02:48:57,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:57,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-09-01 02:48:57,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:57,853 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) [2023-09-01 02:48:57,853 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) [2023-09-01 02:48:57,853 INFO L175 Difference]: Start difference. First operand has 120 places, 146 transitions, 831 flow. Second operand 3 states and 752 transitions. [2023-09-01 02:48:57,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 144 transitions, 1083 flow [2023-09-01 02:48:59,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 144 transitions, 1082 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:59,231 INFO L231 Difference]: Finished difference. Result has 119 places, 144 transitions, 828 flow [2023-09-01 02:48:59,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=119, PETRI_TRANSITIONS=144} [2023-09-01 02:48:59,232 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 48 predicate places. [2023-09-01 02:48:59,232 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 144 transitions, 828 flow [2023-09-01 02:48:59,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-09-01 02:48:59,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:59,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:59,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:48:59,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:59,443 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-09-01 02:48:59,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash 281383016, now seen corresponding path program 1 times [2023-09-01 02:48:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:48:59,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318315337] [2023-09-01 02:48:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:59,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:48:59,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:48:59,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:48:59,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:48:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:48:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:59,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:48:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:48:59,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:59,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:48:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318315337] [2023-09-01 02:48:59,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318315337] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:59,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:59,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:48:59,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441244537] [2023-09-01 02:48:59,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:59,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:59,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:48:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:59,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:48:59,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-09-01 02:48:59,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 144 transitions, 828 flow. Second operand has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:59,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:59,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-09-01 02:48:59,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand