./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix032.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix032.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:56:57,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:56:57,340 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:56:57,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:56:57,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:56:57,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:56:57,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:56:57,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:56:57,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:56:57,384 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:56:57,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:56:57,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:56:57,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:56:57,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:56:57,387 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:56:57,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:56:57,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:56:57,387 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:56:57,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:56:57,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:56:57,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:56:57,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:56:57,390 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:56:57,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:56:57,390 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:56:57,390 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:56:57,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:56:57,391 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:56:57,391 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:56:57,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:56:57,392 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:56:57,392 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:56:57,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:56:57,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:56:57,393 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:56:57,393 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:56:57,393 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:56:57,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:56:57,394 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:56:57,394 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:56:57,394 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:56:57,394 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:56:57,394 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:56:57,395 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:56:57,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:56:57,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:56:57,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:56:57,626 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:56:57,627 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:56:57,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-21 20:56:58,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:56:58,703 INFO L384 CDTParser]: Found 0 translation units. [2024-06-21 20:56:58,706 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6d0a7bf/2802a83f2af84315b0b7be4faafaf13c/FLAG807e641d5 [2024-06-21 20:56:58,715 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6d0a7bf/2802a83f2af84315b0b7be4faafaf13c [2024-06-21 20:56:58,719 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:56:58,720 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:56:58,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix032.oepc.yml/witness.yml [2024-06-21 20:56:58,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:56:58,905 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:56:58,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:56:58,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:56:58,913 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:56:58,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:56:58" (1/2) ... [2024-06-21 20:56:58,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6924c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:56:58, skipping insertion in model container [2024-06-21 20:56:58,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:56:58" (1/2) ... [2024-06-21 20:56:58,916 INFO L99 ieTranslatorObserver]: Witness extractor is disabled for multiple files [2024-06-21 20:56:58,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7176ff82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:56:58, skipping insertion in model container [2024-06-21 20:56:58,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:56:58" (2/2) ... [2024-06-21 20:56:58,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6924c13 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:56:58, skipping insertion in model container [2024-06-21 20:56:58,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:56:58" (2/2) ... [2024-06-21 20:56:58,923 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.util.NoSuchElementException: No value present at java.base/java.util.Optional.get(Optional.java:148) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:151) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:118) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:145) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-06-21 20:56:58,931 INFO L158 Benchmark]: Toolchain (without parser) took 25.47ms. Allocated memory is still 134.2MB. Free memory was 58.5MB in the beginning and 57.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:56:58,931 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:56:58,932 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 134.2MB. Free memory is still 68.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:56:58,933 INFO L158 Benchmark]: CACSL2BoogieTranslator took 23.92ms. Allocated memory is still 134.2MB. Free memory was 58.3MB in the beginning and 57.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:56:58,934 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 134.2MB. Free memory is still 68.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 23.92ms. Allocated memory is still 134.2MB. Free memory was 58.3MB in the beginning and 57.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: NoSuchElementException: No value present de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: NoSuchElementException: No value present: java.base/java.util.Optional.get(Optional.java:148) 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: /root/.sdkman/candidates/java/current/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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix032.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:57:00,839 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:57:00,912 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-06-21 20:57:00,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:57:00,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:57:00,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:57:00,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:57:00,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:57:00,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:57:00,953 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:57:00,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:57:00,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:57:00,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:57:00,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:57:00,955 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:57:00,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:57:00,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:57:00,956 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:57:00,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:57:00,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:57:00,956 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:57:00,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:57:00,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:57:00,957 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-06-21 20:57:00,957 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-06-21 20:57:00,958 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:57:00,958 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-06-21 20:57:00,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:57:00,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:57:00,958 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:57:00,959 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:57:00,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:57:00,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:57:00,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:57:00,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:57:00,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:57:00,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:57:00,961 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:57:00,961 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-06-21 20:57:00,961 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-06-21 20:57:00,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:57:00,962 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:57:00,962 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:57:00,962 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:57:00,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:57:00,963 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-06-21 20:57:00,963 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:57:01,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:57:01,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:57:01,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:57:01,255 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:57:01,256 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:57:01,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix032.oepc.yml/witness.yml [2024-06-21 20:57:01,412 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:57:01,412 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:57:01,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-21 20:57:02,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:57:02,819 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:57:02,819 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-21 20:57:02,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0d28f3b/22e63c7192fe44bc9cdf0a4b5e4b584b/FLAG1cd78de89 [2024-06-21 20:57:02,848 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0d28f3b/22e63c7192fe44bc9cdf0a4b5e4b584b [2024-06-21 20:57:02,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:57:02,850 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:57:02,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:57:02,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:57:02,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:57:02,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:01" (1/2) ... [2024-06-21 20:57:02,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4498da and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:02, skipping insertion in model container [2024-06-21 20:57:02,857 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:01" (1/2) ... [2024-06-21 20:57:02,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55657cd5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:02, skipping insertion in model container [2024-06-21 20:57:02,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:57:02" (2/2) ... [2024-06-21 20:57:02,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4498da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:02, skipping insertion in model container [2024-06-21 20:57:02,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:57:02" (2/2) ... [2024-06-21 20:57:02,860 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:57:02,942 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:57:02,943 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1)) [2024-06-21 20:57:02,943 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1)) [2024-06-21 20:57:02,943 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1)) [2024-06-21 20:57:02,944 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:57:02,944 INFO L106 edCorrectnessWitness]: ghost_update [L856-L856] multithreaded = 1; [2024-06-21 20:57:02,981 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:57:03,298 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:57:03,310 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:57:03,462 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:57:03,511 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:57:03,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03 WrapperNode [2024-06-21 20:57:03,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:57:03,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:57:03,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:57:03,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:57:03,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,579 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 131 [2024-06-21 20:57:03,580 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:57:03,580 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:57:03,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:57:03,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:57:03,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,592 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,619 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:57:03,620 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,630 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:57:03,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:57:03,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:57:03,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:57:03,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (1/1) ... [2024-06-21 20:57:03,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:57:03,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:57:03,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:57:03,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:57:03,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:57:03,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:57:03,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-06-21 20:57:03,692 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:57:03,692 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:57:03,692 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:57:03,693 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:57:03,693 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:57:03,693 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:57:03,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:57:03,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:57:03,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:57:03,695 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:57:03,841 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:57:03,844 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:57:04,236 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:57:04,236 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:57:04,421 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:57:04,422 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:57:04,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:57:04 BoogieIcfgContainer [2024-06-21 20:57:04,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:57:04,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:57:04,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:57:04,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:57:04,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:01" (1/4) ... [2024-06-21 20:57:04,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b67b69 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:57:04, skipping insertion in model container [2024-06-21 20:57:04,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:57:02" (2/4) ... [2024-06-21 20:57:04,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b67b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:57:04, skipping insertion in model container [2024-06-21 20:57:04,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:03" (3/4) ... [2024-06-21 20:57:04,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b67b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:57:04, skipping insertion in model container [2024-06-21 20:57:04,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:57:04" (4/4) ... [2024-06-21 20:57:04,428 INFO L112 eAbstractionObserver]: Analyzing ICFG mix032.oepc.i [2024-06-21 20:57:04,442 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:57:04,442 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:57:04,442 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:57:04,478 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:57:04,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:57:04,524 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-21 20:57:04,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:57:04,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:57:04,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:57:04,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-21 20:57:04,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:57:04,543 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=LoopHeads, 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;@198d3711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:57:04,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:57:04,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:57:04,546 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:57:04,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:57:04,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:04,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:57:04,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:04,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash 387802913, now seen corresponding path program 1 times [2024-06-21 20:57:04,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:04,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728829149] [2024-06-21 20:57:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:04,560 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 [2024-06-21 20:57:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:04,562 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) [2024-06-21 20:57:04,563 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 [2024-06-21 20:57:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:04,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:57:04,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:05,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:05,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:05,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728829149] [2024-06-21 20:57:05,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728829149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:05,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:05,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:57:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281773397] [2024-06-21 20:57:05,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:05,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:57:05,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:57:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:57:05,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 20:57:05,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:05,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:05,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 20:57:05,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:05,993 INFO L124 PetriNetUnfolderBase]: 1566/2436 cut-off events. [2024-06-21 20:57:05,994 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 20:57:06,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4847 conditions, 2436 events. 1566/2436 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12309 event pairs, 1097 based on Foata normal form. 1/2362 useless extension candidates. Maximal degree in co-relation 4835. Up to 2326 conditions per place. [2024-06-21 20:57:06,012 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 20:57:06,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 179 flow [2024-06-21 20:57:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:57:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:57:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 20:57:06,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-06-21 20:57:06,024 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 82 transitions. [2024-06-21 20:57:06,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 179 flow [2024-06-21 20:57:06,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:06,031 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-21 20:57:06,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:57:06,036 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-21 20:57:06,036 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-21 20:57:06,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:06,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:06,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:06,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-06-21 20:57:06,238 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 [2024-06-21 20:57:06,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:06,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash -982909834, now seen corresponding path program 1 times [2024-06-21 20:57:06,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040957457] [2024-06-21 20:57:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:06,243 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 [2024-06-21 20:57:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:06,245 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) [2024-06-21 20:57:06,247 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 [2024-06-21 20:57:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:06,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:06,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:07,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:07,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040957457] [2024-06-21 20:57:07,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040957457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:07,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:07,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:57:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50200619] [2024-06-21 20:57:07,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:57:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:57:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:57:07,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 20:57:07,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:07,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:07,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 20:57:07,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:07,497 INFO L124 PetriNetUnfolderBase]: 1560/2433 cut-off events. [2024-06-21 20:57:07,497 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-06-21 20:57:07,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5449 conditions, 2433 events. 1560/2433 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12353 event pairs, 930 based on Foata normal form. 3/2397 useless extension candidates. Maximal degree in co-relation 5437. Up to 2302 conditions per place. [2024-06-21 20:57:07,506 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 20:57:07,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 246 flow [2024-06-21 20:57:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:57:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:57:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-21 20:57:07,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-21 20:57:07,509 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 106 transitions. [2024-06-21 20:57:07,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 246 flow [2024-06-21 20:57:07,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:57:07,511 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-21 20:57:07,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 20:57:07,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-21 20:57:07,511 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-21 20:57:07,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:07,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:07,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:07,522 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 [2024-06-21 20:57:07,723 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 [2024-06-21 20:57:07,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:07,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 316496725, now seen corresponding path program 1 times [2024-06-21 20:57:07,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:07,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853547466] [2024-06-21 20:57:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:07,725 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 [2024-06-21 20:57:07,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:07,726 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) [2024-06-21 20:57:07,729 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 [2024-06-21 20:57:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:07,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:57:07,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:08,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:08,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:08,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853547466] [2024-06-21 20:57:08,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853547466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:08,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:08,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:08,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72561434] [2024-06-21 20:57:08,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:08,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:08,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:08,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:08,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:08,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:08,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:09,283 INFO L124 PetriNetUnfolderBase]: 1893/2922 cut-off events. [2024-06-21 20:57:09,283 INFO L125 PetriNetUnfolderBase]: For 1525/1525 co-relation queries the response was YES. [2024-06-21 20:57:09,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7209 conditions, 2922 events. 1893/2922 cut-off events. For 1525/1525 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14770 event pairs, 878 based on Foata normal form. 3/2877 useless extension candidates. Maximal degree in co-relation 7195. Up to 2753 conditions per place. [2024-06-21 20:57:09,295 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-21 20:57:09,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 380 flow [2024-06-21 20:57:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:57:09,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-21 20:57:09,297 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:57:09,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 380 flow [2024-06-21 20:57:09,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:09,300 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-21 20:57:09,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-21 20:57:09,301 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-21 20:57:09,301 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-21 20:57:09,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:09,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:09,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:09,308 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 [2024-06-21 20:57:09,504 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 [2024-06-21 20:57:09,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:09,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 364969313, now seen corresponding path program 1 times [2024-06-21 20:57:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:09,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474790629] [2024-06-21 20:57:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:09,506 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 [2024-06-21 20:57:09,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:09,507 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) [2024-06-21 20:57:09,536 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 [2024-06-21 20:57:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:09,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:57:09,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:10,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:10,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:10,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474790629] [2024-06-21 20:57:10,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474790629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:10,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:10,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700038452] [2024-06-21 20:57:10,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:10,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:10,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:10,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:10,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:10,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:10,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:10,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:11,239 INFO L124 PetriNetUnfolderBase]: 1884/2903 cut-off events. [2024-06-21 20:57:11,239 INFO L125 PetriNetUnfolderBase]: For 3016/3016 co-relation queries the response was YES. [2024-06-21 20:57:11,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7974 conditions, 2903 events. 1884/2903 cut-off events. For 3016/3016 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14634 event pairs, 690 based on Foata normal form. 6/2859 useless extension candidates. Maximal degree in co-relation 7958. Up to 2708 conditions per place. [2024-06-21 20:57:11,254 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-21 20:57:11,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 440 flow [2024-06-21 20:57:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:57:11,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-21 20:57:11,256 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:57:11,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 440 flow [2024-06-21 20:57:11,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 412 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:11,260 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 221 flow [2024-06-21 20:57:11,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-21 20:57:11,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-21 20:57:11,261 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 221 flow [2024-06-21 20:57:11,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:11,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:11,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:11,265 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 [2024-06-21 20:57:11,464 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 [2024-06-21 20:57:11,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:11,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash -413794246, now seen corresponding path program 1 times [2024-06-21 20:57:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:11,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152080585] [2024-06-21 20:57:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:11,466 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 [2024-06-21 20:57:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:11,467 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) [2024-06-21 20:57:11,469 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 [2024-06-21 20:57:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:11,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:57:11,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:12,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:12,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:12,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152080585] [2024-06-21 20:57:12,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152080585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:12,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:12,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:57:12,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885680946] [2024-06-21 20:57:12,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:12,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:57:12,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:57:12,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:57:12,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:12,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:12,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:12,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:12,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:13,018 INFO L124 PetriNetUnfolderBase]: 1879/2896 cut-off events. [2024-06-21 20:57:13,018 INFO L125 PetriNetUnfolderBase]: For 4612/4612 co-relation queries the response was YES. [2024-06-21 20:57:13,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8451 conditions, 2896 events. 1879/2896 cut-off events. For 4612/4612 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14565 event pairs, 812 based on Foata normal form. 2/2848 useless extension candidates. Maximal degree in co-relation 8434. Up to 2767 conditions per place. [2024-06-21 20:57:13,035 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 48 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-06-21 20:57:13,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 375 flow [2024-06-21 20:57:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:57:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:57:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-21 20:57:13,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-21 20:57:13,038 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 221 flow. Second operand 4 states and 98 transitions. [2024-06-21 20:57:13,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 375 flow [2024-06-21 20:57:13,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 336 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:13,044 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 226 flow [2024-06-21 20:57:13,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-21 20:57:13,046 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-21 20:57:13,046 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 226 flow [2024-06-21 20:57:13,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:13,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:13,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:13,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-06-21 20:57:13,249 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 [2024-06-21 20:57:13,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:13,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash 95712272, now seen corresponding path program 1 times [2024-06-21 20:57:13,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032152461] [2024-06-21 20:57:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:13,251 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 [2024-06-21 20:57:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:13,257 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) [2024-06-21 20:57:13,258 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 [2024-06-21 20:57:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:13,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:57:13,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:14,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:14,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032152461] [2024-06-21 20:57:14,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032152461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:14,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:14,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:57:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628683530] [2024-06-21 20:57:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:14,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:57:14,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:57:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:57:14,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:14,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:14,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:14,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:14,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:14,680 INFO L124 PetriNetUnfolderBase]: 2215/3407 cut-off events. [2024-06-21 20:57:14,680 INFO L125 PetriNetUnfolderBase]: For 7255/7255 co-relation queries the response was YES. [2024-06-21 20:57:14,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10466 conditions, 3407 events. 2215/3407 cut-off events. For 7255/7255 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17088 event pairs, 972 based on Foata normal form. 2/3399 useless extension candidates. Maximal degree in co-relation 10448. Up to 3242 conditions per place. [2024-06-21 20:57:14,704 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 53 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-21 20:57:14,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 410 flow [2024-06-21 20:57:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-21 20:57:14,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-21 20:57:14,706 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 226 flow. Second operand 5 states and 114 transitions. [2024-06-21 20:57:14,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 410 flow [2024-06-21 20:57:14,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 390 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:14,712 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 260 flow [2024-06-21 20:57:14,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-21 20:57:14,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-21 20:57:14,715 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 260 flow [2024-06-21 20:57:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:14,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:14,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:14,732 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 [2024-06-21 20:57:14,918 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 [2024-06-21 20:57:14,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:14,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2012983723, now seen corresponding path program 1 times [2024-06-21 20:57:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:14,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001407432] [2024-06-21 20:57:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:14,920 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 [2024-06-21 20:57:14,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:14,921 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) [2024-06-21 20:57:14,926 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 [2024-06-21 20:57:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:14,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:14,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:15,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:15,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001407432] [2024-06-21 20:57:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001407432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:15,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:15,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:57:15,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781359290] [2024-06-21 20:57:15,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:15,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:57:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:15,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:57:15,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:57:15,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:15,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:15,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:15,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:15,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:16,325 INFO L124 PetriNetUnfolderBase]: 2094/3286 cut-off events. [2024-06-21 20:57:16,326 INFO L125 PetriNetUnfolderBase]: For 9930/9936 co-relation queries the response was YES. [2024-06-21 20:57:16,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10814 conditions, 3286 events. 2094/3286 cut-off events. For 9930/9936 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16973 event pairs, 875 based on Foata normal form. 6/3280 useless extension candidates. Maximal degree in co-relation 10795. Up to 3040 conditions per place. [2024-06-21 20:57:16,348 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 57 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-21 20:57:16,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 522 flow [2024-06-21 20:57:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 20:57:16,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-21 20:57:16,352 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 260 flow. Second operand 5 states and 125 transitions. [2024-06-21 20:57:16,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 522 flow [2024-06-21 20:57:16,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 492 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:16,356 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 318 flow [2024-06-21 20:57:16,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-21 20:57:16,357 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-21 20:57:16,357 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 318 flow [2024-06-21 20:57:16,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:16,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:16,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:16,384 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 [2024-06-21 20:57:16,561 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 [2024-06-21 20:57:16,561 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:16,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1287502319, now seen corresponding path program 2 times [2024-06-21 20:57:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:16,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740701163] [2024-06-21 20:57:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:57:16,563 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 [2024-06-21 20:57:16,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:16,564 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) [2024-06-21 20:57:16,565 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 [2024-06-21 20:57:16,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:57:16,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:16,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:16,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:17,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:17,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:17,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740701163] [2024-06-21 20:57:17,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740701163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:17,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:17,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:57:17,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986624037] [2024-06-21 20:57:17,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:17,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:57:17,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:17,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:57:17,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:57:17,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:17,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:17,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:17,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:17,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:17,969 INFO L124 PetriNetUnfolderBase]: 2089/3278 cut-off events. [2024-06-21 20:57:17,969 INFO L125 PetriNetUnfolderBase]: For 12801/12801 co-relation queries the response was YES. [2024-06-21 20:57:17,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11506 conditions, 3278 events. 2089/3278 cut-off events. For 12801/12801 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16942 event pairs, 871 based on Foata normal form. 2/3269 useless extension candidates. Maximal degree in co-relation 11486. Up to 3059 conditions per place. [2024-06-21 20:57:17,987 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 57 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-21 20:57:17,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 490 flow [2024-06-21 20:57:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 20:57:17,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-21 20:57:17,989 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 318 flow. Second operand 5 states and 118 transitions. [2024-06-21 20:57:17,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 490 flow [2024-06-21 20:57:17,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 454 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-21 20:57:17,996 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 310 flow [2024-06-21 20:57:17,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-21 20:57:17,997 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-21 20:57:17,997 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 310 flow [2024-06-21 20:57:17,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:17,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:17,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:18,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-06-21 20:57:18,200 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 [2024-06-21 20:57:18,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:18,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1775739993, now seen corresponding path program 1 times [2024-06-21 20:57:18,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:18,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184806527] [2024-06-21 20:57:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:18,204 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 [2024-06-21 20:57:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:18,205 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) [2024-06-21 20:57:18,242 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 [2024-06-21 20:57:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:18,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:57:18,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:19,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:19,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184806527] [2024-06-21 20:57:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184806527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:19,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632924704] [2024-06-21 20:57:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:19,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:19,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:19,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:19,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:19,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:19,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:19,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:19,758 INFO L124 PetriNetUnfolderBase]: 2211/3382 cut-off events. [2024-06-21 20:57:19,759 INFO L125 PetriNetUnfolderBase]: For 14788/14788 co-relation queries the response was YES. [2024-06-21 20:57:19,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12023 conditions, 3382 events. 2211/3382 cut-off events. For 14788/14788 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16857 event pairs, 909 based on Foata normal form. 4/3373 useless extension candidates. Maximal degree in co-relation 12001. Up to 3219 conditions per place. [2024-06-21 20:57:19,774 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 64 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-21 20:57:19,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 540 flow [2024-06-21 20:57:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 20:57:19,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-21 20:57:19,776 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 310 flow. Second operand 6 states and 134 transitions. [2024-06-21 20:57:19,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 540 flow [2024-06-21 20:57:19,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 508 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:19,783 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 344 flow [2024-06-21 20:57:19,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-06-21 20:57:19,784 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-21 20:57:19,784 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 344 flow [2024-06-21 20:57:19,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:19,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:19,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:19,788 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 [2024-06-21 20:57:19,987 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 [2024-06-21 20:57:19,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:19,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2022132563, now seen corresponding path program 1 times [2024-06-21 20:57:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:19,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123948489] [2024-06-21 20:57:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:19,990 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 [2024-06-21 20:57:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:19,991 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) [2024-06-21 20:57:19,992 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 [2024-06-21 20:57:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:20,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-21 20:57:20,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:21,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:21,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123948489] [2024-06-21 20:57:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123948489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:21,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:21,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:21,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296760737] [2024-06-21 20:57:21,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:21,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:21,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:21,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:21,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:21,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:21,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:21,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:21,719 INFO L124 PetriNetUnfolderBase]: 2090/3265 cut-off events. [2024-06-21 20:57:21,719 INFO L125 PetriNetUnfolderBase]: For 18151/18151 co-relation queries the response was YES. [2024-06-21 20:57:21,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12346 conditions, 3265 events. 2090/3265 cut-off events. For 18151/18151 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16791 event pairs, 826 based on Foata normal form. 2/3253 useless extension candidates. Maximal degree in co-relation 12324. Up to 3040 conditions per place. [2024-06-21 20:57:21,734 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 70 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-06-21 20:57:21,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 602 flow [2024-06-21 20:57:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:57:21,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-21 20:57:21,736 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 344 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:57:21,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 602 flow [2024-06-21 20:57:21,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 560 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:21,743 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 370 flow [2024-06-21 20:57:21,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-21 20:57:21,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-21 20:57:21,745 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 370 flow [2024-06-21 20:57:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:21,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:21,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:21,748 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 [2024-06-21 20:57:21,948 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 [2024-06-21 20:57:21,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:21,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash -964011167, now seen corresponding path program 2 times [2024-06-21 20:57:21,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:21,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496334014] [2024-06-21 20:57:21,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:57:21,953 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 [2024-06-21 20:57:21,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:21,954 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) [2024-06-21 20:57:21,959 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 [2024-06-21 20:57:22,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:57:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:22,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:22,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:22,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:22,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:22,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496334014] [2024-06-21 20:57:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496334014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:22,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:22,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:22,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229322275] [2024-06-21 20:57:22,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:22,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:22,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:23,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:23,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 370 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:23,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:23,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:23,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:23,429 INFO L124 PetriNetUnfolderBase]: 2101/3282 cut-off events. [2024-06-21 20:57:23,429 INFO L125 PetriNetUnfolderBase]: For 22159/22165 co-relation queries the response was YES. [2024-06-21 20:57:23,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13089 conditions, 3282 events. 2101/3282 cut-off events. For 22159/22165 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16903 event pairs, 830 based on Foata normal form. 6/3273 useless extension candidates. Maximal degree in co-relation 13066. Up to 3009 conditions per place. [2024-06-21 20:57:23,448 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 63 selfloop transitions, 25 changer transitions 0/96 dead transitions. [2024-06-21 20:57:23,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 714 flow [2024-06-21 20:57:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:57:23,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-21 20:57:23,450 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 370 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:57:23,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 714 flow [2024-06-21 20:57:23,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 670 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:23,459 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 458 flow [2024-06-21 20:57:23,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-21 20:57:23,460 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-21 20:57:23,460 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 458 flow [2024-06-21 20:57:23,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:23,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:23,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:23,476 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 [2024-06-21 20:57:23,663 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 [2024-06-21 20:57:23,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:23,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2022012407, now seen corresponding path program 1 times [2024-06-21 20:57:23,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:23,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614206667] [2024-06-21 20:57:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:23,665 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 [2024-06-21 20:57:23,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:23,666 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) [2024-06-21 20:57:23,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-06-21 20:57:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:23,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:23,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:24,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:24,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614206667] [2024-06-21 20:57:24,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614206667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:24,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:24,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440372318] [2024-06-21 20:57:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:24,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:24,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 458 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:24,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:24,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:24,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:25,042 INFO L124 PetriNetUnfolderBase]: 2244/3459 cut-off events. [2024-06-21 20:57:25,042 INFO L125 PetriNetUnfolderBase]: For 26453/26459 co-relation queries the response was YES. [2024-06-21 20:57:25,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14354 conditions, 3459 events. 2244/3459 cut-off events. For 26453/26459 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17474 event pairs, 893 based on Foata normal form. 3/3446 useless extension candidates. Maximal degree in co-relation 14330. Up to 3227 conditions per place. [2024-06-21 20:57:25,060 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 74 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-06-21 20:57:25,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 814 flow [2024-06-21 20:57:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:57:25,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-06-21 20:57:25,062 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 458 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:57:25,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 814 flow [2024-06-21 20:57:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 772 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:25,077 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 534 flow [2024-06-21 20:57:25,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=534, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-21 20:57:25,078 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-21 20:57:25,078 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 534 flow [2024-06-21 20:57:25,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:25,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:25,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:25,081 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 [2024-06-21 20:57:25,281 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 [2024-06-21 20:57:25,282 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:25,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1290932801, now seen corresponding path program 3 times [2024-06-21 20:57:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:25,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569872294] [2024-06-21 20:57:25,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:57:25,283 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 [2024-06-21 20:57:25,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:25,284 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) [2024-06-21 20:57:25,285 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 [2024-06-21 20:57:25,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:57:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:25,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:25,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:26,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:26,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:26,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569872294] [2024-06-21 20:57:26,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569872294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:26,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:26,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:26,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108031784] [2024-06-21 20:57:26,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:26,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:26,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:26,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:26,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 534 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:26,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:26,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:26,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:26,731 INFO L124 PetriNetUnfolderBase]: 2114/3326 cut-off events. [2024-06-21 20:57:26,731 INFO L125 PetriNetUnfolderBase]: For 30707/30707 co-relation queries the response was YES. [2024-06-21 20:57:26,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14514 conditions, 3326 events. 2114/3326 cut-off events. For 30707/30707 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17257 event pairs, 820 based on Foata normal form. 2/3313 useless extension candidates. Maximal degree in co-relation 14488. Up to 3077 conditions per place. [2024-06-21 20:57:26,747 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 74 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2024-06-21 20:57:26,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 97 transitions, 756 flow [2024-06-21 20:57:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 20:57:26,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-21 20:57:26,749 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 534 flow. Second operand 6 states and 138 transitions. [2024-06-21 20:57:26,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 97 transitions, 756 flow [2024-06-21 20:57:26,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 700 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:26,764 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 512 flow [2024-06-21 20:57:26,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=512, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-21 20:57:26,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-21 20:57:26,765 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 512 flow [2024-06-21 20:57:26,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:26,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:26,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:26,778 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 [2024-06-21 20:57:26,968 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 [2024-06-21 20:57:26,969 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:26,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:26,969 INFO L85 PathProgramCache]: Analyzing trace with hash -786879461, now seen corresponding path program 2 times [2024-06-21 20:57:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312788986] [2024-06-21 20:57:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:57:26,970 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 [2024-06-21 20:57:26,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:26,972 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) [2024-06-21 20:57:27,005 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 [2024-06-21 20:57:27,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:57:27,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:27,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:27,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:27,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:27,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312788986] [2024-06-21 20:57:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312788986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:27,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:27,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:27,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95637289] [2024-06-21 20:57:27,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:27,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:27,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:27,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:27,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:27,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:27,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:28,303 INFO L124 PetriNetUnfolderBase]: 2250/3467 cut-off events. [2024-06-21 20:57:28,304 INFO L125 PetriNetUnfolderBase]: For 34552/34552 co-relation queries the response was YES. [2024-06-21 20:57:28,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15424 conditions, 3467 events. 2250/3467 cut-off events. For 34552/34552 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17479 event pairs, 885 based on Foata normal form. 2/3454 useless extension candidates. Maximal degree in co-relation 15396. Up to 3265 conditions per place. [2024-06-21 20:57:28,321 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 78 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2024-06-21 20:57:28,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 844 flow [2024-06-21 20:57:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 20:57:28,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-06-21 20:57:28,322 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 512 flow. Second operand 6 states and 137 transitions. [2024-06-21 20:57:28,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 844 flow [2024-06-21 20:57:28,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 102 transitions, 802 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:28,382 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 550 flow [2024-06-21 20:57:28,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-21 20:57:28,383 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-21 20:57:28,383 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 550 flow [2024-06-21 20:57:28,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:28,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:28,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:28,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:28,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:28,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash -786642311, now seen corresponding path program 3 times [2024-06-21 20:57:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:28,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860172173] [2024-06-21 20:57:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:57:28,587 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 [2024-06-21 20:57:28,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:28,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:28,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-06-21 20:57:28,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:57:28,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:28,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:28,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:29,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:29,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860172173] [2024-06-21 20:57:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860172173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:29,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:29,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743913648] [2024-06-21 20:57:29,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:29,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:29,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:29,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 550 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:29,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:29,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:29,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:29,986 INFO L124 PetriNetUnfolderBase]: 2245/3460 cut-off events. [2024-06-21 20:57:29,986 INFO L125 PetriNetUnfolderBase]: For 38442/38442 co-relation queries the response was YES. [2024-06-21 20:57:29,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15685 conditions, 3460 events. 2245/3460 cut-off events. For 38442/38442 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17456 event pairs, 885 based on Foata normal form. 2/3447 useless extension candidates. Maximal degree in co-relation 15656. Up to 3278 conditions per place. [2024-06-21 20:57:30,006 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 81 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2024-06-21 20:57:30,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 786 flow [2024-06-21 20:57:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 20:57:30,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2024-06-21 20:57:30,008 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 550 flow. Second operand 6 states and 133 transitions. [2024-06-21 20:57:30,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 786 flow [2024-06-21 20:57:30,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 706 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:30,035 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 504 flow [2024-06-21 20:57:30,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=504, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2024-06-21 20:57:30,036 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-21 20:57:30,036 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 504 flow [2024-06-21 20:57:30,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:30,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:30,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:30,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:30,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:30,240 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:30,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1859312931, now seen corresponding path program 1 times [2024-06-21 20:57:30,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:30,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851763165] [2024-06-21 20:57:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:30,241 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 [2024-06-21 20:57:30,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:30,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:30,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-06-21 20:57:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:30,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:57:30,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:31,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:31,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851763165] [2024-06-21 20:57:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851763165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:57:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358981258] [2024-06-21 20:57:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:31,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:57:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:57:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:57:31,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:31,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:31,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:31,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:31,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:31,899 INFO L124 PetriNetUnfolderBase]: 2285/3634 cut-off events. [2024-06-21 20:57:31,899 INFO L125 PetriNetUnfolderBase]: For 48065/48065 co-relation queries the response was YES. [2024-06-21 20:57:31,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16722 conditions, 3634 events. 2285/3634 cut-off events. For 48065/48065 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19017 event pairs, 997 based on Foata normal form. 1/3633 useless extension candidates. Maximal degree in co-relation 16692. Up to 3360 conditions per place. [2024-06-21 20:57:31,919 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 68 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2024-06-21 20:57:31,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 696 flow [2024-06-21 20:57:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:57:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:57:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 20:57:31,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-06-21 20:57:31,920 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 504 flow. Second operand 4 states and 94 transitions. [2024-06-21 20:57:31,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 696 flow [2024-06-21 20:57:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 660 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:31,941 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 516 flow [2024-06-21 20:57:31,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=516, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 20:57:31,942 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-21 20:57:31,942 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 516 flow [2024-06-21 20:57:31,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:31,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:31,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:31,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-06-21 20:57:32,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:32,145 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:32,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash 176617080, now seen corresponding path program 1 times [2024-06-21 20:57:32,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:32,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024847851] [2024-06-21 20:57:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:32,147 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 [2024-06-21 20:57:32,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:32,148 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:32,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-06-21 20:57:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:32,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:57:32,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:33,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:33,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:33,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024847851] [2024-06-21 20:57:33,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024847851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:33,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:33,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:33,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312416631] [2024-06-21 20:57:33,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:33,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:33,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:33,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:33,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:33,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:33,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:33,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:33,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:34,021 INFO L124 PetriNetUnfolderBase]: 2144/3369 cut-off events. [2024-06-21 20:57:34,021 INFO L125 PetriNetUnfolderBase]: For 47404/47404 co-relation queries the response was YES. [2024-06-21 20:57:34,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16215 conditions, 3369 events. 2144/3369 cut-off events. For 47404/47404 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17424 event pairs, 798 based on Foata normal form. 2/3369 useless extension candidates. Maximal degree in co-relation 16184. Up to 3071 conditions per place. [2024-06-21 20:57:34,039 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 95 selfloop transitions, 22 changer transitions 0/128 dead transitions. [2024-06-21 20:57:34,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 984 flow [2024-06-21 20:57:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:57:34,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-21 20:57:34,042 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 516 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:57:34,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 984 flow [2024-06-21 20:57:34,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 128 transitions, 958 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:34,060 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 624 flow [2024-06-21 20:57:34,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=624, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2024-06-21 20:57:34,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-21 20:57:34,061 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 624 flow [2024-06-21 20:57:34,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:34,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:34,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:34,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-06-21 20:57:34,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:34,264 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:34,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash -699429298, now seen corresponding path program 2 times [2024-06-21 20:57:34,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:34,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808788630] [2024-06-21 20:57:34,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:57:34,265 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 [2024-06-21 20:57:34,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:34,267 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:34,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-06-21 20:57:34,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:57:34,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:34,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:57:34,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:35,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:35,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:35,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808788630] [2024-06-21 20:57:35,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808788630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:35,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:35,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224718108] [2024-06-21 20:57:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:35,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:35,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 624 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:35,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:35,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:35,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:36,220 INFO L124 PetriNetUnfolderBase]: 2139/3362 cut-off events. [2024-06-21 20:57:36,220 INFO L125 PetriNetUnfolderBase]: For 53613/53613 co-relation queries the response was YES. [2024-06-21 20:57:36,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16911 conditions, 3362 events. 2139/3362 cut-off events. For 53613/53613 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17384 event pairs, 798 based on Foata normal form. 2/3362 useless extension candidates. Maximal degree in co-relation 16879. Up to 3090 conditions per place. [2024-06-21 20:57:36,240 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 92 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-21 20:57:36,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 914 flow [2024-06-21 20:57:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:57:36,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-21 20:57:36,242 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 624 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:57:36,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 914 flow [2024-06-21 20:57:36,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 119 transitions, 838 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:36,271 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 588 flow [2024-06-21 20:57:36,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-06-21 20:57:36,272 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-21 20:57:36,272 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 588 flow [2024-06-21 20:57:36,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:36,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:36,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:36,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:36,475 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:36,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1741976527, now seen corresponding path program 1 times [2024-06-21 20:57:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:36,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523890690] [2024-06-21 20:57:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:36,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:36,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:36,479 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:36,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-06-21 20:57:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:36,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-21 20:57:36,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:37,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:37,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523890690] [2024-06-21 20:57:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523890690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:37,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065827375] [2024-06-21 20:57:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:37,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:37,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 588 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:37,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:37,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:37,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:38,287 INFO L124 PetriNetUnfolderBase]: 2275/3502 cut-off events. [2024-06-21 20:57:38,287 INFO L125 PetriNetUnfolderBase]: For 59029/59029 co-relation queries the response was YES. [2024-06-21 20:57:38,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17806 conditions, 3502 events. 2275/3502 cut-off events. For 59029/59029 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17561 event pairs, 842 based on Foata normal form. 2/3502 useless extension candidates. Maximal degree in co-relation 17772. Up to 3301 conditions per place. [2024-06-21 20:57:38,307 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 100 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2024-06-21 20:57:38,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 934 flow [2024-06-21 20:57:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 20:57:38,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-06-21 20:57:38,308 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 588 flow. Second operand 7 states and 158 transitions. [2024-06-21 20:57:38,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 934 flow [2024-06-21 20:57:38,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 894 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:38,335 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 634 flow [2024-06-21 20:57:38,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-21 20:57:38,335 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-21 20:57:38,335 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 634 flow [2024-06-21 20:57:38,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:38,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:38,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:38,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2024-06-21 20:57:38,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:38,539 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:38,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1742120522, now seen corresponding path program 3 times [2024-06-21 20:57:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:38,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306113275] [2024-06-21 20:57:38,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:57:38,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:38,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:38,541 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:38,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-06-21 20:57:38,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:57:38,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:38,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:57:38,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:39,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:39,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:39,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306113275] [2024-06-21 20:57:39,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306113275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:39,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:39,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:39,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811411378] [2024-06-21 20:57:39,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:39,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:39,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:39,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:39,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:39,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:39,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:39,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:40,348 INFO L124 PetriNetUnfolderBase]: 2168/3401 cut-off events. [2024-06-21 20:57:40,349 INFO L125 PetriNetUnfolderBase]: For 65717/65720 co-relation queries the response was YES. [2024-06-21 20:57:40,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18006 conditions, 3401 events. 2168/3401 cut-off events. For 65717/65720 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17549 event pairs, 796 based on Foata normal form. 4/3402 useless extension candidates. Maximal degree in co-relation 17971. Up to 3077 conditions per place. [2024-06-21 20:57:40,367 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 82 selfloop transitions, 28 changer transitions 0/122 dead transitions. [2024-06-21 20:57:40,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 966 flow [2024-06-21 20:57:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:57:40,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 20:57:40,375 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 634 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:57:40,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 966 flow [2024-06-21 20:57:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 122 transitions, 904 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:40,406 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 688 flow [2024-06-21 20:57:40,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-06-21 20:57:40,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-21 20:57:40,406 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 688 flow [2024-06-21 20:57:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:40,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:40,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:40,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:40,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:40,612 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:40,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1742120677, now seen corresponding path program 2 times [2024-06-21 20:57:40,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:40,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283570485] [2024-06-21 20:57:40,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:57:40,613 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 [2024-06-21 20:57:40,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:40,614 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:40,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-06-21 20:57:40,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:57:40,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:40,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:40,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:41,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:41,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283570485] [2024-06-21 20:57:41,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283570485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:41,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:41,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716213810] [2024-06-21 20:57:41,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:41,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:41,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:41,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:41,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 688 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:41,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:41,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:41,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:42,155 INFO L124 PetriNetUnfolderBase]: 2313/3558 cut-off events. [2024-06-21 20:57:42,155 INFO L125 PetriNetUnfolderBase]: For 74236/74239 co-relation queries the response was YES. [2024-06-21 20:57:42,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19572 conditions, 3558 events. 2313/3558 cut-off events. For 74236/74239 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17846 event pairs, 850 based on Foata normal form. 2/3557 useless extension candidates. Maximal degree in co-relation 19536. Up to 3234 conditions per place. [2024-06-21 20:57:42,175 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 87 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-21 20:57:42,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 1320 flow [2024-06-21 20:57:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:57:42,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-21 20:57:42,177 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 688 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:57:42,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 1320 flow [2024-06-21 20:57:42,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 1228 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:42,210 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 838 flow [2024-06-21 20:57:42,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=838, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-21 20:57:42,211 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-21 20:57:42,211 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 838 flow [2024-06-21 20:57:42,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:42,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:42,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:42,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:42,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:42,415 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:42,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:42,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1742126474, now seen corresponding path program 1 times [2024-06-21 20:57:42,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:42,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923956364] [2024-06-21 20:57:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:42,416 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 [2024-06-21 20:57:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:42,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:42,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-06-21 20:57:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:42,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:42,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:43,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:43,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:43,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923956364] [2024-06-21 20:57:43,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923956364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:43,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:43,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033286538] [2024-06-21 20:57:43,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:43,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:43,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:43,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:43,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 838 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:43,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:43,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:43,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:44,146 INFO L124 PetriNetUnfolderBase]: 2351/3616 cut-off events. [2024-06-21 20:57:44,146 INFO L125 PetriNetUnfolderBase]: For 83624/83627 co-relation queries the response was YES. [2024-06-21 20:57:44,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20577 conditions, 3616 events. 2351/3616 cut-off events. For 83624/83627 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18122 event pairs, 796 based on Foata normal form. 4/3617 useless extension candidates. Maximal degree in co-relation 20540. Up to 3320 conditions per place. [2024-06-21 20:57:44,169 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 107 selfloop transitions, 31 changer transitions 0/144 dead transitions. [2024-06-21 20:57:44,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1364 flow [2024-06-21 20:57:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:57:44,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 20:57:44,171 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 838 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:57:44,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1364 flow [2024-06-21 20:57:44,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1294 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:44,250 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 954 flow [2024-06-21 20:57:44,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=954, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-21 20:57:44,251 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-21 20:57:44,251 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 954 flow [2024-06-21 20:57:44,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:44,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:44,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:44,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:44,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:44,453 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:44,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1742126257, now seen corresponding path program 3 times [2024-06-21 20:57:44,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:44,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299175486] [2024-06-21 20:57:44,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:57:44,454 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 [2024-06-21 20:57:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:44,455 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:44,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2024-06-21 20:57:44,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:57:44,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:44,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:44,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:45,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:45,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299175486] [2024-06-21 20:57:45,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299175486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:45,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:45,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:45,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023566278] [2024-06-21 20:57:45,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:45,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:45,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:45,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:45,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:45,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 954 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:45,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:45,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:45,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:46,264 INFO L124 PetriNetUnfolderBase]: 2346/3604 cut-off events. [2024-06-21 20:57:46,265 INFO L125 PetriNetUnfolderBase]: For 90612/90615 co-relation queries the response was YES. [2024-06-21 20:57:46,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21437 conditions, 3604 events. 2346/3604 cut-off events. For 90612/90615 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18062 event pairs, 810 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 21397. Up to 3284 conditions per place. [2024-06-21 20:57:46,286 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 93 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-06-21 20:57:46,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1382 flow [2024-06-21 20:57:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:57:46,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-21 20:57:46,288 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 954 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:57:46,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1382 flow [2024-06-21 20:57:46,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 1308 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:46,336 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 974 flow [2024-06-21 20:57:46,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-06-21 20:57:46,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-21 20:57:46,337 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 974 flow [2024-06-21 20:57:46,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:46,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:46,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:46,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2024-06-21 20:57:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:46,540 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:46,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1356585190, now seen corresponding path program 2 times [2024-06-21 20:57:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555891309] [2024-06-21 20:57:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:57:46,541 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 [2024-06-21 20:57:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:46,543 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:46,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2024-06-21 20:57:46,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:57:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:46,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:46,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:47,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:47,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:47,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555891309] [2024-06-21 20:57:47,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555891309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:47,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:47,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:47,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139630834] [2024-06-21 20:57:47,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:47,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:47,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:47,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:47,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:47,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:47,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 974 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:47,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:47,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:47,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:48,074 INFO L124 PetriNetUnfolderBase]: 2368/3640 cut-off events. [2024-06-21 20:57:48,074 INFO L125 PetriNetUnfolderBase]: For 98452/98452 co-relation queries the response was YES. [2024-06-21 20:57:48,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21974 conditions, 3640 events. 2368/3640 cut-off events. For 98452/98452 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18244 event pairs, 802 based on Foata normal form. 4/3642 useless extension candidates. Maximal degree in co-relation 21931. Up to 3439 conditions per place. [2024-06-21 20:57:48,098 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 119 selfloop transitions, 16 changer transitions 0/141 dead transitions. [2024-06-21 20:57:48,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 141 transitions, 1354 flow [2024-06-21 20:57:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 20:57:48,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-21 20:57:48,100 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 974 flow. Second operand 7 states and 153 transitions. [2024-06-21 20:57:48,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 141 transitions, 1354 flow [2024-06-21 20:57:48,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1278 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:48,139 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 992 flow [2024-06-21 20:57:48,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=992, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2024-06-21 20:57:48,140 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-21 20:57:48,140 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 992 flow [2024-06-21 20:57:48,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:48,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:48,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:48,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2024-06-21 20:57:48,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:48,343 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:48,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1383893569, now seen corresponding path program 4 times [2024-06-21 20:57:48,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:48,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193160065] [2024-06-21 20:57:48,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:57:48,344 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 [2024-06-21 20:57:48,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:48,345 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:48,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2024-06-21 20:57:48,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:57:48,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:48,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:48,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:49,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:49,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193160065] [2024-06-21 20:57:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193160065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:49,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:49,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061804534] [2024-06-21 20:57:49,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:49,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:49,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:49,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:49,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:49,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 992 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:49,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:49,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:49,772 INFO L124 PetriNetUnfolderBase]: 2379/3656 cut-off events. [2024-06-21 20:57:49,772 INFO L125 PetriNetUnfolderBase]: For 105553/105553 co-relation queries the response was YES. [2024-06-21 20:57:49,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22347 conditions, 3656 events. 2379/3656 cut-off events. For 105553/105553 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18326 event pairs, 802 based on Foata normal form. 2/3656 useless extension candidates. Maximal degree in co-relation 22303. Up to 3464 conditions per place. [2024-06-21 20:57:49,797 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 121 selfloop transitions, 16 changer transitions 0/143 dead transitions. [2024-06-21 20:57:49,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 143 transitions, 1381 flow [2024-06-21 20:57:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 20:57:49,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-06-21 20:57:49,799 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 992 flow. Second operand 7 states and 152 transitions. [2024-06-21 20:57:49,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 143 transitions, 1381 flow [2024-06-21 20:57:49,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 143 transitions, 1311 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:49,930 INFO L231 Difference]: Finished difference. Result has 108 places, 120 transitions, 1025 flow [2024-06-21 20:57:49,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1025, PETRI_PLACES=108, PETRI_TRANSITIONS=120} [2024-06-21 20:57:49,930 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-21 20:57:49,930 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 120 transitions, 1025 flow [2024-06-21 20:57:49,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:49,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:49,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:49,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2024-06-21 20:57:50,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:50,131 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:50,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1383893786, now seen corresponding path program 3 times [2024-06-21 20:57:50,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:50,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355294477] [2024-06-21 20:57:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:57:50,132 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 [2024-06-21 20:57:50,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:50,133 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:50,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2024-06-21 20:57:50,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:57:50,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:50,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:50,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:51,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:51,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355294477] [2024-06-21 20:57:51,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355294477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:51,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:51,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:51,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212429085] [2024-06-21 20:57:51,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:51,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:51,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:51,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:51,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 120 transitions, 1025 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:51,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:51,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:51,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:51,823 INFO L124 PetriNetUnfolderBase]: 2401/3693 cut-off events. [2024-06-21 20:57:51,824 INFO L125 PetriNetUnfolderBase]: For 113697/113697 co-relation queries the response was YES. [2024-06-21 20:57:51,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22806 conditions, 3693 events. 2401/3693 cut-off events. For 113697/113697 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18533 event pairs, 802 based on Foata normal form. 4/3695 useless extension candidates. Maximal degree in co-relation 22762. Up to 3460 conditions per place. [2024-06-21 20:57:51,846 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 121 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-06-21 20:57:51,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 148 transitions, 1429 flow [2024-06-21 20:57:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 20:57:51,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-06-21 20:57:51,848 INFO L175 Difference]: Start difference. First operand has 108 places, 120 transitions, 1025 flow. Second operand 7 states and 156 transitions. [2024-06-21 20:57:51,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 148 transitions, 1429 flow [2024-06-21 20:57:51,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 148 transitions, 1359 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:51,910 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 1065 flow [2024-06-21 20:57:51,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1065, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-21 20:57:51,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-21 20:57:51,911 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 1065 flow [2024-06-21 20:57:51,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:51,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:51,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:51,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:52,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:52,117 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:52,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1376536184, now seen corresponding path program 4 times [2024-06-21 20:57:52,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:52,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969079697] [2024-06-21 20:57:52,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:57:52,118 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 [2024-06-21 20:57:52,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:52,119 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:52,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2024-06-21 20:57:52,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:57:52,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:52,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:57:52,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:53,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:53,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969079697] [2024-06-21 20:57:53,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969079697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:53,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:53,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:53,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056986152] [2024-06-21 20:57:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:53,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:53,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:53,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 1065 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:53,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:53,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:53,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:53,911 INFO L124 PetriNetUnfolderBase]: 2270/3560 cut-off events. [2024-06-21 20:57:53,912 INFO L125 PetriNetUnfolderBase]: For 119724/119724 co-relation queries the response was YES. [2024-06-21 20:57:53,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22329 conditions, 3560 events. 2270/3560 cut-off events. For 119724/119724 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18414 event pairs, 752 based on Foata normal form. 2/3560 useless extension candidates. Maximal degree in co-relation 22284. Up to 3271 conditions per place. [2024-06-21 20:57:53,935 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 117 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-21 20:57:53,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1445 flow [2024-06-21 20:57:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 20:57:53,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-06-21 20:57:53,953 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 1065 flow. Second operand 7 states and 158 transitions. [2024-06-21 20:57:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1445 flow [2024-06-21 20:57:54,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 149 transitions, 1365 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:54,019 INFO L231 Difference]: Finished difference. Result has 112 places, 126 transitions, 1087 flow [2024-06-21 20:57:54,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1087, PETRI_PLACES=112, PETRI_TRANSITIONS=126} [2024-06-21 20:57:54,019 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-21 20:57:54,020 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 126 transitions, 1087 flow [2024-06-21 20:57:54,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:54,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:54,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:54,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2024-06-21 20:57:54,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:54,224 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:54,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1376536339, now seen corresponding path program 5 times [2024-06-21 20:57:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:54,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652052987] [2024-06-21 20:57:54,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 20:57:54,225 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 [2024-06-21 20:57:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:54,226 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:54,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2024-06-21 20:57:54,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:57:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:54,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:54,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:55,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:55,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:55,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652052987] [2024-06-21 20:57:55,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652052987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:55,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:55,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:55,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320450590] [2024-06-21 20:57:55,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:55,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:55,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:55,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:55,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:55,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:55,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 126 transitions, 1087 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:55,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:55,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:55,866 INFO L124 PetriNetUnfolderBase]: 2407/3702 cut-off events. [2024-06-21 20:57:55,867 INFO L125 PetriNetUnfolderBase]: For 129412/129412 co-relation queries the response was YES. [2024-06-21 20:57:55,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 3702 events. 2407/3702 cut-off events. For 129412/129412 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18604 event pairs, 802 based on Foata normal form. 2/3702 useless extension candidates. Maximal degree in co-relation 23666. Up to 3458 conditions per place. [2024-06-21 20:57:55,888 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 119 selfloop transitions, 29 changer transitions 0/154 dead transitions. [2024-06-21 20:57:55,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 154 transitions, 1614 flow [2024-06-21 20:57:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 20:57:55,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097402597402597 [2024-06-21 20:57:55,890 INFO L175 Difference]: Start difference. First operand has 112 places, 126 transitions, 1087 flow. Second operand 7 states and 157 transitions. [2024-06-21 20:57:55,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 154 transitions, 1614 flow [2024-06-21 20:57:55,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 154 transitions, 1536 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:55,961 INFO L231 Difference]: Finished difference. Result has 114 places, 129 transitions, 1138 flow [2024-06-21 20:57:55,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1138, PETRI_PLACES=114, PETRI_TRANSITIONS=129} [2024-06-21 20:57:55,962 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-21 20:57:55,962 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 129 transitions, 1138 flow [2024-06-21 20:57:55,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:55,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:55,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:55,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:56,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:56,165 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:56,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash -499977623, now seen corresponding path program 6 times [2024-06-21 20:57:56,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:56,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292264818] [2024-06-21 20:57:56,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 20:57:56,166 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 [2024-06-21 20:57:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:56,167 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:56,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2024-06-21 20:57:56,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 20:57:56,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:56,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:56,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:57,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:57,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:57,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292264818] [2024-06-21 20:57:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292264818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:57,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985075221] [2024-06-21 20:57:57,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:57,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:57,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 1138 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:57,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:57,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:57,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:57,836 INFO L124 PetriNetUnfolderBase]: 2402/3695 cut-off events. [2024-06-21 20:57:57,836 INFO L125 PetriNetUnfolderBase]: For 136677/136677 co-relation queries the response was YES. [2024-06-21 20:57:57,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23905 conditions, 3695 events. 2402/3695 cut-off events. For 136677/136677 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18564 event pairs, 802 based on Foata normal form. 2/3695 useless extension candidates. Maximal degree in co-relation 23858. Up to 3453 conditions per place. [2024-06-21 20:57:57,859 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 118 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-21 20:57:57,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1488 flow [2024-06-21 20:57:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 20:57:57,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-06-21 20:57:57,860 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 1138 flow. Second operand 7 states and 156 transitions. [2024-06-21 20:57:57,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1488 flow [2024-06-21 20:57:57,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 152 transitions, 1312 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:57,941 INFO L231 Difference]: Finished difference. Result has 115 places, 129 transitions, 1026 flow [2024-06-21 20:57:57,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1026, PETRI_PLACES=115, PETRI_TRANSITIONS=129} [2024-06-21 20:57:57,944 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 20:57:57,944 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 129 transitions, 1026 flow [2024-06-21 20:57:57,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:57,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:57,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:57,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2024-06-21 20:57:58,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:57:58,147 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:58,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:58,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1376542136, now seen corresponding path program 4 times [2024-06-21 20:57:58,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:57:58,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964424040] [2024-06-21 20:57:58,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:57:58,148 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 [2024-06-21 20:57:58,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:57:58,149 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:57:58,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2024-06-21 20:57:58,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:57:58,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:57:58,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:57:58,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:57:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:59,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:57:59,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:57:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964424040] [2024-06-21 20:57:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964424040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:59,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:59,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:59,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369648286] [2024-06-21 20:57:59,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:59,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:59,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:57:59,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:59,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:59,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:59,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 129 transitions, 1026 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:59,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:59,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:59,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:59,882 INFO L124 PetriNetUnfolderBase]: 2392/3681 cut-off events. [2024-06-21 20:57:59,882 INFO L125 PetriNetUnfolderBase]: For 143355/143355 co-relation queries the response was YES. [2024-06-21 20:57:59,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23865 conditions, 3681 events. 2392/3681 cut-off events. For 143355/143355 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18504 event pairs, 800 based on Foata normal form. 4/3683 useless extension candidates. Maximal degree in co-relation 23817. Up to 3412 conditions per place. [2024-06-21 20:57:59,908 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 120 selfloop transitions, 28 changer transitions 0/154 dead transitions. [2024-06-21 20:57:59,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 154 transitions, 1388 flow [2024-06-21 20:57:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 20:57:59,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-06-21 20:57:59,910 INFO L175 Difference]: Start difference. First operand has 115 places, 129 transitions, 1026 flow. Second operand 7 states and 158 transitions. [2024-06-21 20:57:59,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 154 transitions, 1388 flow [2024-06-21 20:57:59,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 154 transitions, 1294 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:59,984 INFO L231 Difference]: Finished difference. Result has 116 places, 129 transitions, 996 flow [2024-06-21 20:57:59,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=996, PETRI_PLACES=116, PETRI_TRANSITIONS=129} [2024-06-21 20:57:59,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-21 20:57:59,985 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 129 transitions, 996 flow [2024-06-21 20:57:59,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:59,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:59,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:59,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:00,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:00,189 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:00,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1756757325, now seen corresponding path program 1 times [2024-06-21 20:58:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:00,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068845915] [2024-06-21 20:58:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:00,209 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 [2024-06-21 20:58:00,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:00,210 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:00,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2024-06-21 20:58:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:00,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:58:00,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:01,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:01,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:01,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068845915] [2024-06-21 20:58:01,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068845915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:01,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:01,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:58:01,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908800561] [2024-06-21 20:58:01,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:01,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:58:01,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:01,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:58:01,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:58:01,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:01,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 129 transitions, 996 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:01,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:01,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:01,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:01,995 INFO L124 PetriNetUnfolderBase]: 2725/4169 cut-off events. [2024-06-21 20:58:01,995 INFO L125 PetriNetUnfolderBase]: For 194001/194001 co-relation queries the response was YES. [2024-06-21 20:58:02,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28219 conditions, 4169 events. 2725/4169 cut-off events. For 194001/194001 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21066 event pairs, 1070 based on Foata normal form. 1/4168 useless extension candidates. Maximal degree in co-relation 28170. Up to 3973 conditions per place. [2024-06-21 20:58:02,029 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 105 selfloop transitions, 10 changer transitions 0/141 dead transitions. [2024-06-21 20:58:02,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 141 transitions, 1274 flow [2024-06-21 20:58:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:58:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:58:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-21 20:58:02,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 20:58:02,031 INFO L175 Difference]: Start difference. First operand has 116 places, 129 transitions, 996 flow. Second operand 5 states and 107 transitions. [2024-06-21 20:58:02,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 141 transitions, 1274 flow [2024-06-21 20:58:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 141 transitions, 1172 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:02,106 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 952 flow [2024-06-21 20:58:02,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=952, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-21 20:58:02,107 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 20:58:02,107 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 952 flow [2024-06-21 20:58:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:02,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:02,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:02,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:02,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:02,310 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:02,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1946985300, now seen corresponding path program 1 times [2024-06-21 20:58:02,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:02,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551701525] [2024-06-21 20:58:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:02,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:02,312 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:02,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2024-06-21 20:58:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:02,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:58:02,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:03,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:03,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551701525] [2024-06-21 20:58:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551701525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:03,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156275068] [2024-06-21 20:58:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:03,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:03,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:03,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:58:03,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 952 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:03,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:03,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:58:03,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:04,598 INFO L124 PetriNetUnfolderBase]: 2383/3712 cut-off events. [2024-06-21 20:58:04,599 INFO L125 PetriNetUnfolderBase]: For 184903/184903 co-relation queries the response was YES. [2024-06-21 20:58:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26111 conditions, 3712 events. 2383/3712 cut-off events. For 184903/184903 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19293 event pairs, 590 based on Foata normal form. 4/3714 useless extension candidates. Maximal degree in co-relation 26061. Up to 3289 conditions per place. [2024-06-21 20:58:04,626 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2024-06-21 20:58:04,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 180 transitions, 1610 flow [2024-06-21 20:58:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 20:58:04,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328282828282829 [2024-06-21 20:58:04,628 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 952 flow. Second operand 9 states and 211 transitions. [2024-06-21 20:58:04,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 180 transitions, 1610 flow [2024-06-21 20:58:04,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 180 transitions, 1574 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:58:04,742 INFO L231 Difference]: Finished difference. Result has 121 places, 136 transitions, 1085 flow [2024-06-21 20:58:04,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1085, PETRI_PLACES=121, PETRI_TRANSITIONS=136} [2024-06-21 20:58:04,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-21 20:58:04,744 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 136 transitions, 1085 flow [2024-06-21 20:58:04,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:04,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:04,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:04,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:04,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:04,948 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:04,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1373989544, now seen corresponding path program 2 times [2024-06-21 20:58:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:04,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227564486] [2024-06-21 20:58:04,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:58:04,949 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 [2024-06-21 20:58:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:04,951 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:04,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2024-06-21 20:58:05,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:05,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:05,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:58:05,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:06,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:06,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227564486] [2024-06-21 20:58:06,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227564486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:06,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:06,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783256557] [2024-06-21 20:58:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:06,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:58:06,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 1085 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:06,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:06,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:58:06,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:07,043 INFO L124 PetriNetUnfolderBase]: 2400/3739 cut-off events. [2024-06-21 20:58:07,043 INFO L125 PetriNetUnfolderBase]: For 198526/198526 co-relation queries the response was YES. [2024-06-21 20:58:07,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26978 conditions, 3739 events. 2400/3739 cut-off events. For 198526/198526 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19406 event pairs, 751 based on Foata normal form. 4/3741 useless extension candidates. Maximal degree in co-relation 26927. Up to 3380 conditions per place. [2024-06-21 20:58:07,081 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 137 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-06-21 20:58:07,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 179 transitions, 1567 flow [2024-06-21 20:58:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:58:07,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2024-06-21 20:58:07,083 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 1085 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:58:07,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 179 transitions, 1567 flow [2024-06-21 20:58:07,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 179 transitions, 1457 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:07,185 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1090 flow [2024-06-21 20:58:07,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1090, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-21 20:58:07,186 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-21 20:58:07,186 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1090 flow [2024-06-21 20:58:07,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:07,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:07,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:07,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:07,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:07,391 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:07,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1946924726, now seen corresponding path program 1 times [2024-06-21 20:58:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:07,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688177873] [2024-06-21 20:58:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:07,392 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 [2024-06-21 20:58:07,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:07,393 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:07,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2024-06-21 20:58:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:07,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:58:07,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:08,497 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:08,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:08,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688177873] [2024-06-21 20:58:08,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688177873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:08,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:08,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:08,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653795561] [2024-06-21 20:58:08,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:08,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:08,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:08,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:08,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1090 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:08,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:08,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:08,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:09,302 INFO L124 PetriNetUnfolderBase]: 2556/3907 cut-off events. [2024-06-21 20:58:09,303 INFO L125 PetriNetUnfolderBase]: For 210749/210749 co-relation queries the response was YES. [2024-06-21 20:58:09,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28234 conditions, 3907 events. 2556/3907 cut-off events. For 210749/210749 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19808 event pairs, 780 based on Foata normal form. 2/3907 useless extension candidates. Maximal degree in co-relation 28181. Up to 3624 conditions per place. [2024-06-21 20:58:09,327 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 150 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-21 20:58:09,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 186 transitions, 1798 flow [2024-06-21 20:58:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 20:58:09,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-06-21 20:58:09,330 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1090 flow. Second operand 9 states and 204 transitions. [2024-06-21 20:58:09,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 186 transitions, 1798 flow [2024-06-21 20:58:09,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 1723 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:09,389 INFO L231 Difference]: Finished difference. Result has 127 places, 144 transitions, 1203 flow [2024-06-21 20:58:09,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1203, PETRI_PLACES=127, PETRI_TRANSITIONS=144} [2024-06-21 20:58:09,390 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-21 20:58:09,390 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 144 transitions, 1203 flow [2024-06-21 20:58:09,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:09,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:09,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:09,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:09,594 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:09,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1182964964, now seen corresponding path program 2 times [2024-06-21 20:58:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:09,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572951704] [2024-06-21 20:58:09,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:58:09,595 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 [2024-06-21 20:58:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:09,596 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:09,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2024-06-21 20:58:09,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:09,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:58:09,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:10,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:10,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:10,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572951704] [2024-06-21 20:58:10,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572951704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:10,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:10,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530491756] [2024-06-21 20:58:10,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:10,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:10,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:11,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:11,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 144 transitions, 1203 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:11,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:11,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:11,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:11,746 INFO L124 PetriNetUnfolderBase]: 2567/3923 cut-off events. [2024-06-21 20:58:11,746 INFO L125 PetriNetUnfolderBase]: For 224486/224486 co-relation queries the response was YES. [2024-06-21 20:58:11,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29025 conditions, 3923 events. 2567/3923 cut-off events. For 224486/224486 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19850 event pairs, 780 based on Foata normal form. 2/3923 useless extension candidates. Maximal degree in co-relation 28971. Up to 3689 conditions per place. [2024-06-21 20:58:11,777 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 154 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2024-06-21 20:58:11,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 180 transitions, 1697 flow [2024-06-21 20:58:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 20:58:11,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028409090909091 [2024-06-21 20:58:11,779 INFO L175 Difference]: Start difference. First operand has 127 places, 144 transitions, 1203 flow. Second operand 8 states and 177 transitions. [2024-06-21 20:58:11,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 180 transitions, 1697 flow [2024-06-21 20:58:11,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 180 transitions, 1595 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:11,881 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1217 flow [2024-06-21 20:58:11,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1217, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-21 20:58:11,883 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-21 20:58:11,883 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1217 flow [2024-06-21 20:58:11,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:11,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:11,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:11,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2024-06-21 20:58:12,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:12,090 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:12,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1944128340, now seen corresponding path program 3 times [2024-06-21 20:58:12,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:12,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063673540] [2024-06-21 20:58:12,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:58:12,091 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 [2024-06-21 20:58:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:12,092 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:12,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2024-06-21 20:58:12,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:58:12,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:12,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:58:12,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:13,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:13,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:13,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063673540] [2024-06-21 20:58:13,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063673540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:13,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:13,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824538347] [2024-06-21 20:58:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:13,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:13,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:58:13,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1217 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:13,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:13,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:58:13,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:14,011 INFO L124 PetriNetUnfolderBase]: 2436/3788 cut-off events. [2024-06-21 20:58:14,011 INFO L125 PetriNetUnfolderBase]: For 234450/234450 co-relation queries the response was YES. [2024-06-21 20:58:14,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28324 conditions, 3788 events. 2436/3788 cut-off events. For 234450/234450 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19670 event pairs, 743 based on Foata normal form. 4/3790 useless extension candidates. Maximal degree in co-relation 28268. Up to 3435 conditions per place. [2024-06-21 20:58:14,040 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 142 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-21 20:58:14,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 181 transitions, 1623 flow [2024-06-21 20:58:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 20:58:14,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-21 20:58:14,042 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1217 flow. Second operand 8 states and 184 transitions. [2024-06-21 20:58:14,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 181 transitions, 1623 flow [2024-06-21 20:58:14,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 181 transitions, 1523 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:14,166 INFO L231 Difference]: Finished difference. Result has 132 places, 147 transitions, 1160 flow [2024-06-21 20:58:14,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1160, PETRI_PLACES=132, PETRI_TRANSITIONS=147} [2024-06-21 20:58:14,167 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-21 20:58:14,167 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 147 transitions, 1160 flow [2024-06-21 20:58:14,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:14,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:14,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:14,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:14,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:14,370 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:14,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1182965150, now seen corresponding path program 1 times [2024-06-21 20:58:14,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:14,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969991194] [2024-06-21 20:58:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:14,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:14,373 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:14,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2024-06-21 20:58:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:14,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-21 20:58:14,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:15,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:15,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:15,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969991194] [2024-06-21 20:58:15,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969991194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:15,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:15,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:15,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623500199] [2024-06-21 20:58:15,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:15,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:15,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:15,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:15,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 147 transitions, 1160 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:15,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:15,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:15,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:16,287 INFO L124 PetriNetUnfolderBase]: 2584/3947 cut-off events. [2024-06-21 20:58:16,288 INFO L125 PetriNetUnfolderBase]: For 247797/247797 co-relation queries the response was YES. [2024-06-21 20:58:16,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29580 conditions, 3947 events. 2584/3947 cut-off events. For 247797/247797 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19991 event pairs, 767 based on Foata normal form. 4/3947 useless extension candidates. Maximal degree in co-relation 29523. Up to 3705 conditions per place. [2024-06-21 20:58:16,319 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 158 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-21 20:58:16,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 184 transitions, 1660 flow [2024-06-21 20:58:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 20:58:16,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-06-21 20:58:16,321 INFO L175 Difference]: Start difference. First operand has 132 places, 147 transitions, 1160 flow. Second operand 8 states and 178 transitions. [2024-06-21 20:58:16,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 184 transitions, 1660 flow [2024-06-21 20:58:16,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 184 transitions, 1612 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:16,411 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1222 flow [2024-06-21 20:58:16,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1222, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-21 20:58:16,411 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-21 20:58:16,412 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1222 flow [2024-06-21 20:58:16,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:16,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:16,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:16,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:16,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:16,615 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:16,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1182960314, now seen corresponding path program 3 times [2024-06-21 20:58:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971009306] [2024-06-21 20:58:16,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:58:16,616 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 [2024-06-21 20:58:16,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:16,618 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:16,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2024-06-21 20:58:16,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:58:16,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:16,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:58:16,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:17,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:17,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:17,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971009306] [2024-06-21 20:58:17,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971009306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:17,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:17,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:17,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652532996] [2024-06-21 20:58:17,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:17,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:17,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:17,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1222 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:17,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:17,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:17,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:18,615 INFO L124 PetriNetUnfolderBase]: 2579/3940 cut-off events. [2024-06-21 20:58:18,615 INFO L125 PetriNetUnfolderBase]: For 258343/258343 co-relation queries the response was YES. [2024-06-21 20:58:18,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30176 conditions, 3940 events. 2579/3940 cut-off events. For 258343/258343 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19959 event pairs, 769 based on Foata normal form. 2/3938 useless extension candidates. Maximal degree in co-relation 30118. Up to 3689 conditions per place. [2024-06-21 20:58:18,645 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 24 changer transitions 0/183 dead transitions. [2024-06-21 20:58:18,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 183 transitions, 1658 flow [2024-06-21 20:58:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 20:58:18,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085227272727273 [2024-06-21 20:58:18,646 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1222 flow. Second operand 8 states and 179 transitions. [2024-06-21 20:58:18,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 183 transitions, 1658 flow [2024-06-21 20:58:18,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1544 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:18,761 INFO L231 Difference]: Finished difference. Result has 135 places, 150 transitions, 1164 flow [2024-06-21 20:58:18,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1164, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2024-06-21 20:58:18,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-21 20:58:18,762 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 1164 flow [2024-06-21 20:58:18,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:18,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:18,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:18,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:18,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:18,965 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:18,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash -202996652, now seen corresponding path program 2 times [2024-06-21 20:58:18,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:18,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62899038] [2024-06-21 20:58:18,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:58:18,966 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 [2024-06-21 20:58:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:18,967 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-21 20:58:18,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2024-06-21 20:58:19,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:19,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:19,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:19,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:19,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:19,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:19,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62899038] [2024-06-21 20:58:19,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62899038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:19,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:19,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:19,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932026855] [2024-06-21 20:58:19,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:19,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:19,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:19,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:20,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:20,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 1164 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:20,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:20,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:20,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:20,655 INFO L124 PetriNetUnfolderBase]: 2649/4047 cut-off events. [2024-06-21 20:58:20,655 INFO L125 PetriNetUnfolderBase]: For 278917/278920 co-relation queries the response was YES. [2024-06-21 20:58:20,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31329 conditions, 4047 events. 2649/4047 cut-off events. For 278917/278920 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20591 event pairs, 747 based on Foata normal form. 4/4046 useless extension candidates. Maximal degree in co-relation 31270. Up to 3476 conditions per place. [2024-06-21 20:58:20,739 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 63 changer transitions 0/197 dead transitions. [2024-06-21 20:58:20,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 197 transitions, 2132 flow [2024-06-21 20:58:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:58:20,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-21 20:58:20,742 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 1164 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:58:20,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 197 transitions, 2132 flow [2024-06-21 20:58:20,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 197 transitions, 2058 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:20,860 INFO L231 Difference]: Finished difference. Result has 136 places, 159 transitions, 1422 flow [2024-06-21 20:58:20,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=136, PETRI_TRANSITIONS=159} [2024-06-21 20:58:20,860 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-21 20:58:20,861 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 159 transitions, 1422 flow [2024-06-21 20:58:20,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:20,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:20,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:20,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2024-06-21 20:58:21,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:21,063 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:21,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1298256134, now seen corresponding path program 4 times [2024-06-21 20:58:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:21,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706056648] [2024-06-21 20:58:21,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:58:21,065 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 [2024-06-21 20:58:21,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:21,066 INFO L229 MonitoredProcess]: Starting monitored process 41 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) [2024-06-21 20:58:21,100 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 (41)] Waiting until timeout for monitored process [2024-06-21 20:58:21,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:58:21,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:21,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:58:21,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:22,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:22,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:22,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706056648] [2024-06-21 20:58:22,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706056648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:22,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:22,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:22,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924795399] [2024-06-21 20:58:22,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:22,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:22,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:22,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:22,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:22,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:22,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 159 transitions, 1422 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:22,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:22,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:22,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:23,089 INFO L124 PetriNetUnfolderBase]: 2660/4068 cut-off events. [2024-06-21 20:58:23,090 INFO L125 PetriNetUnfolderBase]: For 294283/294286 co-relation queries the response was YES. [2024-06-21 20:58:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32345 conditions, 4068 events. 2660/4068 cut-off events. For 294283/294286 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20765 event pairs, 781 based on Foata normal form. 2/4065 useless extension candidates. Maximal degree in co-relation 32285. Up to 3698 conditions per place. [2024-06-21 20:58:23,126 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 134 selfloop transitions, 51 changer transitions 0/192 dead transitions. [2024-06-21 20:58:23,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 192 transitions, 1936 flow [2024-06-21 20:58:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:58:23,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170454545454546 [2024-06-21 20:58:23,127 INFO L175 Difference]: Start difference. First operand has 136 places, 159 transitions, 1422 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:58:23,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 192 transitions, 1936 flow [2024-06-21 20:58:23,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 192 transitions, 1834 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 20:58:23,261 INFO L231 Difference]: Finished difference. Result has 141 places, 162 transitions, 1504 flow [2024-06-21 20:58:23,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1504, PETRI_PLACES=141, PETRI_TRANSITIONS=162} [2024-06-21 20:58:23,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-21 20:58:23,262 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 162 transitions, 1504 flow [2024-06-21 20:58:23,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:23,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:23,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:23,271 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 (41)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:23,465 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:23,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1298429300, now seen corresponding path program 3 times [2024-06-21 20:58:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:23,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248388196] [2024-06-21 20:58:23,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:58:23,466 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 [2024-06-21 20:58:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:23,467 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2024-06-21 20:58:23,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2024-06-21 20:58:23,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:58:23,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:23,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:23,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:24,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:24,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:24,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248388196] [2024-06-21 20:58:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248388196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:24,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:24,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888193113] [2024-06-21 20:58:24,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:24,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:24,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 162 transitions, 1504 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:24,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:24,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:24,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:25,086 INFO L124 PetriNetUnfolderBase]: 2682/4100 cut-off events. [2024-06-21 20:58:25,086 INFO L125 PetriNetUnfolderBase]: For 310323/310326 co-relation queries the response was YES. [2024-06-21 20:58:25,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33275 conditions, 4100 events. 2682/4100 cut-off events. For 310323/310326 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20915 event pairs, 747 based on Foata normal form. 4/4099 useless extension candidates. Maximal degree in co-relation 33213. Up to 3511 conditions per place. [2024-06-21 20:58:25,120 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 129 selfloop transitions, 67 changer transitions 0/203 dead transitions. [2024-06-21 20:58:25,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 2364 flow [2024-06-21 20:58:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:58:25,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-21 20:58:25,122 INFO L175 Difference]: Start difference. First operand has 141 places, 162 transitions, 1504 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:58:25,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 2364 flow [2024-06-21 20:58:25,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 203 transitions, 2204 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:25,247 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1542 flow [2024-06-21 20:58:25,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1542, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-21 20:58:25,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-21 20:58:25,247 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1542 flow [2024-06-21 20:58:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:25,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:25,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:25,253 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 (42)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:25,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:25,451 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:25,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1298251360, now seen corresponding path program 4 times [2024-06-21 20:58:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:25,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051305582] [2024-06-21 20:58:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:58:25,452 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 [2024-06-21 20:58:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:25,453 INFO L229 MonitoredProcess]: Starting monitored process 43 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) [2024-06-21 20:58:25,454 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 (43)] Waiting until timeout for monitored process [2024-06-21 20:58:25,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:58:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:25,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:58:25,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:26,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:26,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:26,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051305582] [2024-06-21 20:58:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051305582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:26,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:26,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:26,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553438973] [2024-06-21 20:58:26,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:26,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:26,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:26,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:26,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:26,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:58:26,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1542 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:26,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:26,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:58:26,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:27,641 INFO L124 PetriNetUnfolderBase]: 2568/3991 cut-off events. [2024-06-21 20:58:27,642 INFO L125 PetriNetUnfolderBase]: For 324344/324347 co-relation queries the response was YES. [2024-06-21 20:58:27,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32985 conditions, 3991 events. 2568/3991 cut-off events. For 324344/324347 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20912 event pairs, 752 based on Foata normal form. 6/3992 useless extension candidates. Maximal degree in co-relation 32922. Up to 3585 conditions per place. [2024-06-21 20:58:27,675 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 146 selfloop transitions, 30 changer transitions 0/198 dead transitions. [2024-06-21 20:58:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 198 transitions, 2036 flow [2024-06-21 20:58:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:58:27,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255681818181818 [2024-06-21 20:58:27,677 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1542 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:58:27,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 198 transitions, 2036 flow [2024-06-21 20:58:27,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 1852 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:27,801 INFO L231 Difference]: Finished difference. Result has 145 places, 167 transitions, 1493 flow [2024-06-21 20:58:27,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=145, PETRI_TRANSITIONS=167} [2024-06-21 20:58:27,801 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-21 20:58:27,801 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 167 transitions, 1493 flow [2024-06-21 20:58:27,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:27,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:27,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:27,806 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 (43)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:28,005 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:28,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1298251484, now seen corresponding path program 5 times [2024-06-21 20:58:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:28,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884216441] [2024-06-21 20:58:28,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 20:58:28,006 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 [2024-06-21 20:58:28,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:28,007 INFO L229 MonitoredProcess]: Starting monitored process 44 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) [2024-06-21 20:58:28,008 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 (44)] Waiting until timeout for monitored process [2024-06-21 20:58:28,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:28,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:28,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:58:28,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:29,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:29,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:29,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884216441] [2024-06-21 20:58:29,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884216441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:29,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:29,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575859395] [2024-06-21 20:58:29,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:29,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:29,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:29,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 167 transitions, 1493 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:29,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:29,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:29,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:30,038 INFO L124 PetriNetUnfolderBase]: 2726/4166 cut-off events. [2024-06-21 20:58:30,038 INFO L125 PetriNetUnfolderBase]: For 341621/341624 co-relation queries the response was YES. [2024-06-21 20:58:30,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34552 conditions, 4166 events. 2726/4166 cut-off events. For 341621/341624 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21280 event pairs, 786 based on Foata normal form. 2/4163 useless extension candidates. Maximal degree in co-relation 34488. Up to 3767 conditions per place. [2024-06-21 20:58:30,070 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 139 selfloop transitions, 59 changer transitions 0/205 dead transitions. [2024-06-21 20:58:30,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 205 transitions, 2285 flow [2024-06-21 20:58:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:58:30,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255681818181818 [2024-06-21 20:58:30,079 INFO L175 Difference]: Start difference. First operand has 145 places, 167 transitions, 1493 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:58:30,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 205 transitions, 2285 flow [2024-06-21 20:58:30,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 205 transitions, 2168 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:30,252 INFO L231 Difference]: Finished difference. Result has 147 places, 173 transitions, 1660 flow [2024-06-21 20:58:30,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1660, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2024-06-21 20:58:30,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-21 20:58:30,253 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1660 flow [2024-06-21 20:58:30,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:30,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:30,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:30,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2024-06-21 20:58:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:30,456 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:30,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1828652720, now seen corresponding path program 4 times [2024-06-21 20:58:30,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:30,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098010348] [2024-06-21 20:58:30,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:58:30,457 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 [2024-06-21 20:58:30,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:30,458 INFO L229 MonitoredProcess]: Starting monitored process 45 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) [2024-06-21 20:58:30,473 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 (45)] Waiting until timeout for monitored process [2024-06-21 20:58:30,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:58:30,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:30,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:30,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:31,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:31,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:31,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098010348] [2024-06-21 20:58:31,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098010348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:31,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:31,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:31,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700539454] [2024-06-21 20:58:31,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:31,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:31,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1660 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:31,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:31,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:31,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:32,387 INFO L124 PetriNetUnfolderBase]: 2716/4152 cut-off events. [2024-06-21 20:58:32,387 INFO L125 PetriNetUnfolderBase]: For 356423/356426 co-relation queries the response was YES. [2024-06-21 20:58:32,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34970 conditions, 4152 events. 2716/4152 cut-off events. For 356423/356426 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 21220 event pairs, 747 based on Foata normal form. 4/4151 useless extension candidates. Maximal degree in co-relation 34905. Up to 3569 conditions per place. [2024-06-21 20:58:32,424 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 132 selfloop transitions, 69 changer transitions 0/208 dead transitions. [2024-06-21 20:58:32,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 208 transitions, 2322 flow [2024-06-21 20:58:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:58:32,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369318181818182 [2024-06-21 20:58:32,426 INFO L175 Difference]: Start difference. First operand has 147 places, 173 transitions, 1660 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:58:32,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 208 transitions, 2322 flow [2024-06-21 20:58:32,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 208 transitions, 2134 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:32,628 INFO L231 Difference]: Finished difference. Result has 151 places, 173 transitions, 1618 flow [2024-06-21 20:58:32,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1618, PETRI_PLACES=151, PETRI_TRANSITIONS=173} [2024-06-21 20:58:32,628 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-21 20:58:32,629 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 173 transitions, 1618 flow [2024-06-21 20:58:32,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:32,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:32,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:32,634 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 (45)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:32,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:32,832 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:32,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1298429114, now seen corresponding path program 6 times [2024-06-21 20:58:32,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:32,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040450547] [2024-06-21 20:58:32,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 20:58:32,833 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 [2024-06-21 20:58:32,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:32,834 INFO L229 MonitoredProcess]: Starting monitored process 46 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) [2024-06-21 20:58:32,836 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 (46)] Waiting until timeout for monitored process [2024-06-21 20:58:32,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 20:58:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:32,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:58:32,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:34,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:34,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040450547] [2024-06-21 20:58:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040450547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:34,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:34,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:34,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658110198] [2024-06-21 20:58:34,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:34,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:34,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 173 transitions, 1618 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:34,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:34,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:34,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:34,794 INFO L124 PetriNetUnfolderBase]: 2711/4145 cut-off events. [2024-06-21 20:58:34,794 INFO L125 PetriNetUnfolderBase]: For 366603/366606 co-relation queries the response was YES. [2024-06-21 20:58:34,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35217 conditions, 4145 events. 2711/4145 cut-off events. For 366603/366606 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 21169 event pairs, 784 based on Foata normal form. 2/4142 useless extension candidates. Maximal degree in co-relation 35150. Up to 3775 conditions per place. [2024-06-21 20:58:34,834 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 144 selfloop transitions, 52 changer transitions 0/203 dead transitions. [2024-06-21 20:58:34,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 203 transitions, 2086 flow [2024-06-21 20:58:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 20:58:34,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142045454545454 [2024-06-21 20:58:34,838 INFO L175 Difference]: Start difference. First operand has 151 places, 173 transitions, 1618 flow. Second operand 8 states and 181 transitions. [2024-06-21 20:58:34,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 203 transitions, 2086 flow [2024-06-21 20:58:35,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 203 transitions, 1937 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:35,020 INFO L231 Difference]: Finished difference. Result has 153 places, 173 transitions, 1581 flow [2024-06-21 20:58:35,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1581, PETRI_PLACES=153, PETRI_TRANSITIONS=173} [2024-06-21 20:58:35,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-21 20:58:35,020 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 173 transitions, 1581 flow [2024-06-21 20:58:35,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:35,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:35,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:35,026 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 (46)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:35,224 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:35,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash -106647940, now seen corresponding path program 1 times [2024-06-21 20:58:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:35,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106236745] [2024-06-21 20:58:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:35,225 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 [2024-06-21 20:58:35,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:35,226 INFO L229 MonitoredProcess]: Starting monitored process 47 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) [2024-06-21 20:58:35,227 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 (47)] Waiting until timeout for monitored process [2024-06-21 20:58:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:35,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:35,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:36,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:36,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:36,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106236745] [2024-06-21 20:58:36,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106236745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:36,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:36,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:58:36,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587338240] [2024-06-21 20:58:36,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:36,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:58:36,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:36,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:58:36,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:58:36,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:58:36,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 173 transitions, 1581 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:36,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:36,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:58:36,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:36,996 INFO L124 PetriNetUnfolderBase]: 2815/4383 cut-off events. [2024-06-21 20:58:36,996 INFO L125 PetriNetUnfolderBase]: For 428242/428248 co-relation queries the response was YES. [2024-06-21 20:58:37,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37928 conditions, 4383 events. 2815/4383 cut-off events. For 428242/428248 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 22951 event pairs, 926 based on Foata normal form. 4/4373 useless extension candidates. Maximal degree in co-relation 37860. Up to 3985 conditions per place. [2024-06-21 20:58:37,040 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 144 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2024-06-21 20:58:37,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 195 transitions, 2101 flow [2024-06-21 20:58:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:58:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:58:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 20:58:37,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-21 20:58:37,042 INFO L175 Difference]: Start difference. First operand has 153 places, 173 transitions, 1581 flow. Second operand 5 states and 120 transitions. [2024-06-21 20:58:37,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 195 transitions, 2101 flow [2024-06-21 20:58:37,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 195 transitions, 1979 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:37,272 INFO L231 Difference]: Finished difference. Result has 151 places, 179 transitions, 1574 flow [2024-06-21 20:58:37,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1574, PETRI_PLACES=151, PETRI_TRANSITIONS=179} [2024-06-21 20:58:37,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-21 20:58:37,273 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 179 transitions, 1574 flow [2024-06-21 20:58:37,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:37,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:37,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:37,278 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 (47)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:37,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:37,476 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:37,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1463895268, now seen corresponding path program 7 times [2024-06-21 20:58:37,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:37,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772671678] [2024-06-21 20:58:37,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 20:58:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:37,479 INFO L229 MonitoredProcess]: Starting monitored process 48 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) [2024-06-21 20:58:37,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2024-06-21 20:58:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:37,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:58:37,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:38,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:38,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772671678] [2024-06-21 20:58:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772671678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:38,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:38,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622889935] [2024-06-21 20:58:38,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:38,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:38,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:38,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 179 transitions, 1574 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:38,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:38,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:38,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:39,488 INFO L124 PetriNetUnfolderBase]: 2761/4203 cut-off events. [2024-06-21 20:58:39,488 INFO L125 PetriNetUnfolderBase]: For 397495/397495 co-relation queries the response was YES. [2024-06-21 20:58:39,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36423 conditions, 4203 events. 2761/4203 cut-off events. For 397495/397495 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 21333 event pairs, 778 based on Foata normal form. 2/4201 useless extension candidates. Maximal degree in co-relation 36354. Up to 3927 conditions per place. [2024-06-21 20:58:39,525 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 170 selfloop transitions, 32 changer transitions 0/209 dead transitions. [2024-06-21 20:58:39,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 209 transitions, 2128 flow [2024-06-21 20:58:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 20:58:39,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-21 20:58:39,548 INFO L175 Difference]: Start difference. First operand has 151 places, 179 transitions, 1574 flow. Second operand 8 states and 174 transitions. [2024-06-21 20:58:39,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 209 transitions, 2128 flow [2024-06-21 20:58:39,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 209 transitions, 2094 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-21 20:58:39,828 INFO L231 Difference]: Finished difference. Result has 158 places, 182 transitions, 1700 flow [2024-06-21 20:58:39,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1700, PETRI_PLACES=158, PETRI_TRANSITIONS=182} [2024-06-21 20:58:39,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-21 20:58:39,829 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 182 transitions, 1700 flow [2024-06-21 20:58:39,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:39,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:39,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:39,833 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 (48)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:40,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:40,032 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:40,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:40,032 INFO L85 PathProgramCache]: Analyzing trace with hash -48970856, now seen corresponding path program 8 times [2024-06-21 20:58:40,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:40,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918150506] [2024-06-21 20:58:40,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:58:40,032 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 [2024-06-21 20:58:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:40,033 INFO L229 MonitoredProcess]: Starting monitored process 49 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) [2024-06-21 20:58:40,037 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 (49)] Waiting until timeout for monitored process [2024-06-21 20:58:40,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:40,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:40,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:58:40,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:41,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:41,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918150506] [2024-06-21 20:58:41,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918150506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:41,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:41,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:41,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530068130] [2024-06-21 20:58:41,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:41,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:41,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:41,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:41,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 182 transitions, 1700 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:41,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:41,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:41,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:42,083 INFO L124 PetriNetUnfolderBase]: 2772/4219 cut-off events. [2024-06-21 20:58:42,084 INFO L125 PetriNetUnfolderBase]: For 416522/416522 co-relation queries the response was YES. [2024-06-21 20:58:42,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37402 conditions, 4219 events. 2772/4219 cut-off events. For 416522/416522 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 21418 event pairs, 778 based on Foata normal form. 2/4217 useless extension candidates. Maximal degree in co-relation 37331. Up to 3988 conditions per place. [2024-06-21 20:58:42,124 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 19 changer transitions 0/212 dead transitions. [2024-06-21 20:58:42,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 212 transitions, 2266 flow [2024-06-21 20:58:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 20:58:42,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-21 20:58:42,125 INFO L175 Difference]: Start difference. First operand has 158 places, 182 transitions, 1700 flow. Second operand 8 states and 171 transitions. [2024-06-21 20:58:42,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 212 transitions, 2266 flow [2024-06-21 20:58:42,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 2130 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:42,357 INFO L231 Difference]: Finished difference. Result has 160 places, 185 transitions, 1704 flow [2024-06-21 20:58:42,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1704, PETRI_PLACES=160, PETRI_TRANSITIONS=185} [2024-06-21 20:58:42,358 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-06-21 20:58:42,358 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 185 transitions, 1704 flow [2024-06-21 20:58:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:42,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:42,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:42,367 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 (49)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:42,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:42,565 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:42,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash -276871820, now seen corresponding path program 5 times [2024-06-21 20:58:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450369426] [2024-06-21 20:58:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 20:58:42,575 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 [2024-06-21 20:58:42,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:42,576 INFO L229 MonitoredProcess]: Starting monitored process 50 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) [2024-06-21 20:58:42,579 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 (50)] Waiting until timeout for monitored process [2024-06-21 20:58:42,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:42,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:42,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:43,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:43,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:43,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450369426] [2024-06-21 20:58:43,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450369426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:43,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:43,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:43,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539954616] [2024-06-21 20:58:43,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:43,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:43,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:43,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:43,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:43,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 185 transitions, 1704 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:43,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:43,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:43,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:44,463 INFO L124 PetriNetUnfolderBase]: 2858/4348 cut-off events. [2024-06-21 20:58:44,463 INFO L125 PetriNetUnfolderBase]: For 450647/450647 co-relation queries the response was YES. [2024-06-21 20:58:44,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39304 conditions, 4348 events. 2858/4348 cut-off events. For 450647/450647 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22252 event pairs, 785 based on Foata normal form. 4/4348 useless extension candidates. Maximal degree in co-relation 39232. Up to 3898 conditions per place. [2024-06-21 20:58:44,504 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 179 selfloop transitions, 45 changer transitions 0/231 dead transitions. [2024-06-21 20:58:44,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 231 transitions, 3025 flow [2024-06-21 20:58:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:58:44,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369318181818182 [2024-06-21 20:58:44,514 INFO L175 Difference]: Start difference. First operand has 160 places, 185 transitions, 1704 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:58:44,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 231 transitions, 3025 flow [2024-06-21 20:58:44,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 231 transitions, 2909 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:44,771 INFO L231 Difference]: Finished difference. Result has 162 places, 194 transitions, 1905 flow [2024-06-21 20:58:44,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1905, PETRI_PLACES=162, PETRI_TRANSITIONS=194} [2024-06-21 20:58:44,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-21 20:58:44,772 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 194 transitions, 1905 flow [2024-06-21 20:58:44,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:44,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:44,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:44,777 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 (50)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:44,975 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:44,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash -277044800, now seen corresponding path program 6 times [2024-06-21 20:58:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:44,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330890519] [2024-06-21 20:58:44,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 20:58:44,976 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 [2024-06-21 20:58:44,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:44,978 INFO L229 MonitoredProcess]: Starting monitored process 51 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) [2024-06-21 20:58:44,979 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 (51)] Waiting until timeout for monitored process [2024-06-21 20:58:45,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 20:58:45,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:45,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:45,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:46,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:46,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:46,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330890519] [2024-06-21 20:58:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330890519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:46,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:46,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942013780] [2024-06-21 20:58:46,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:46,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:46,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:46,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 194 transitions, 1905 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:46,770 INFO L124 PetriNetUnfolderBase]: 2848/4339 cut-off events. [2024-06-21 20:58:46,771 INFO L125 PetriNetUnfolderBase]: For 463048/463048 co-relation queries the response was YES. [2024-06-21 20:58:46,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39409 conditions, 4339 events. 2848/4339 cut-off events. For 463048/463048 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22207 event pairs, 778 based on Foata normal form. 4/4339 useless extension candidates. Maximal degree in co-relation 39336. Up to 3890 conditions per place. [2024-06-21 20:58:46,814 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 171 selfloop transitions, 48 changer transitions 0/226 dead transitions. [2024-06-21 20:58:46,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 226 transitions, 2617 flow [2024-06-21 20:58:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:58:46,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170454545454546 [2024-06-21 20:58:46,815 INFO L175 Difference]: Start difference. First operand has 162 places, 194 transitions, 1905 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:58:46,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 226 transitions, 2617 flow [2024-06-21 20:58:47,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 226 transitions, 2363 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:47,119 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 1755 flow [2024-06-21 20:58:47,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1755, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2024-06-21 20:58:47,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-21 20:58:47,120 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 1755 flow [2024-06-21 20:58:47,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:47,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:47,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:47,124 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 (51)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:47,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:47,324 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:47,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash -277049636, now seen corresponding path program 9 times [2024-06-21 20:58:47,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:47,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113432739] [2024-06-21 20:58:47,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:58:47,325 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 [2024-06-21 20:58:47,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:47,326 INFO L229 MonitoredProcess]: Starting monitored process 52 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) [2024-06-21 20:58:47,337 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 (52)] Waiting until timeout for monitored process [2024-06-21 20:58:47,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:58:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:47,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:58:47,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:48,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:48,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113432739] [2024-06-21 20:58:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113432739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:48,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:48,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:48,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610628435] [2024-06-21 20:58:48,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:48,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:48,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:48,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:48,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 1755 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:48,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:48,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:48,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:49,360 INFO L124 PetriNetUnfolderBase]: 2859/4355 cut-off events. [2024-06-21 20:58:49,360 INFO L125 PetriNetUnfolderBase]: For 474083/474083 co-relation queries the response was YES. [2024-06-21 20:58:49,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39615 conditions, 4355 events. 2859/4355 cut-off events. For 474083/474083 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22283 event pairs, 785 based on Foata normal form. 2/4353 useless extension candidates. Maximal degree in co-relation 39541. Up to 4031 conditions per place. [2024-06-21 20:58:49,400 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 179 selfloop transitions, 43 changer transitions 0/229 dead transitions. [2024-06-21 20:58:49,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 229 transitions, 2653 flow [2024-06-21 20:58:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 20:58:49,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028409090909091 [2024-06-21 20:58:49,402 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 1755 flow. Second operand 8 states and 177 transitions. [2024-06-21 20:58:49,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 229 transitions, 2653 flow [2024-06-21 20:58:49,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 229 transitions, 2553 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:49,711 INFO L231 Difference]: Finished difference. Result has 167 places, 200 transitions, 1943 flow [2024-06-21 20:58:49,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1943, PETRI_PLACES=167, PETRI_TRANSITIONS=200} [2024-06-21 20:58:49,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-21 20:58:49,711 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 200 transitions, 1943 flow [2024-06-21 20:58:49,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:49,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:49,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:49,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2024-06-21 20:58:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:49,920 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:49,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -277049760, now seen corresponding path program 5 times [2024-06-21 20:58:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667538237] [2024-06-21 20:58:49,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 20:58:49,921 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 [2024-06-21 20:58:49,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:49,923 INFO L229 MonitoredProcess]: Starting monitored process 53 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) [2024-06-21 20:58:49,932 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 (53)] Waiting until timeout for monitored process [2024-06-21 20:58:49,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:49,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:49,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:58:49,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:51,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:51,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:51,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667538237] [2024-06-21 20:58:51,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667538237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:51,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:51,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457586697] [2024-06-21 20:58:51,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:51,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:51,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:51,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:58:51,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 200 transitions, 1943 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:51,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:51,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:58:51,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:52,091 INFO L124 PetriNetUnfolderBase]: 2716/4203 cut-off events. [2024-06-21 20:58:52,092 INFO L125 PetriNetUnfolderBase]: For 488085/488085 co-relation queries the response was YES. [2024-06-21 20:58:52,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38668 conditions, 4203 events. 2716/4203 cut-off events. For 488085/488085 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22013 event pairs, 753 based on Foata normal form. 4/4203 useless extension candidates. Maximal degree in co-relation 38593. Up to 3812 conditions per place. [2024-06-21 20:58:52,144 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 184 selfloop transitions, 18 changer transitions 0/230 dead transitions. [2024-06-21 20:58:52,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 230 transitions, 2493 flow [2024-06-21 20:58:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 20:58:52,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-06-21 20:58:52,145 INFO L175 Difference]: Start difference. First operand has 167 places, 200 transitions, 1943 flow. Second operand 8 states and 178 transitions. [2024-06-21 20:58:52,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 230 transitions, 2493 flow [2024-06-21 20:58:52,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 230 transitions, 2337 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:52,511 INFO L231 Difference]: Finished difference. Result has 171 places, 202 transitions, 1910 flow [2024-06-21 20:58:52,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1910, PETRI_PLACES=171, PETRI_TRANSITIONS=202} [2024-06-21 20:58:52,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-21 20:58:52,511 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 202 transitions, 1910 flow [2024-06-21 20:58:52,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:52,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:52,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:52,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2024-06-21 20:58:52,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:52,715 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:52,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:52,715 INFO L85 PathProgramCache]: Analyzing trace with hash -276865310, now seen corresponding path program 7 times [2024-06-21 20:58:52,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:52,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698572746] [2024-06-21 20:58:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 20:58:52,715 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 [2024-06-21 20:58:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:52,716 INFO L229 MonitoredProcess]: Starting monitored process 54 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) [2024-06-21 20:58:52,717 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 (54)] Waiting until timeout for monitored process [2024-06-21 20:58:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:52,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:52,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:53,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:53,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698572746] [2024-06-21 20:58:53,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698572746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:53,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:53,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572053480] [2024-06-21 20:58:53,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:53,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:53,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 202 transitions, 1910 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:53,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:54,585 INFO L124 PetriNetUnfolderBase]: 2841/4329 cut-off events. [2024-06-21 20:58:54,586 INFO L125 PetriNetUnfolderBase]: For 504900/504900 co-relation queries the response was YES. [2024-06-21 20:58:54,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40011 conditions, 4329 events. 2841/4329 cut-off events. For 504900/504900 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22128 event pairs, 776 based on Foata normal form. 4/4329 useless extension candidates. Maximal degree in co-relation 39934. Up to 3886 conditions per place. [2024-06-21 20:58:54,632 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 181 selfloop transitions, 46 changer transitions 0/234 dead transitions. [2024-06-21 20:58:54,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 234 transitions, 2650 flow [2024-06-21 20:58:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:58:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198863636363636 [2024-06-21 20:58:54,636 INFO L175 Difference]: Start difference. First operand has 171 places, 202 transitions, 1910 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:58:54,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 234 transitions, 2650 flow [2024-06-21 20:58:54,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 234 transitions, 2509 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:54,958 INFO L231 Difference]: Finished difference. Result has 173 places, 202 transitions, 1869 flow [2024-06-21 20:58:54,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1869, PETRI_PLACES=173, PETRI_TRANSITIONS=202} [2024-06-21 20:58:54,958 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-21 20:58:54,958 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 202 transitions, 1869 flow [2024-06-21 20:58:54,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:54,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:54,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:54,962 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 (54)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:55,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:55,163 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:55,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash -276872006, now seen corresponding path program 10 times [2024-06-21 20:58:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235962863] [2024-06-21 20:58:55,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:58:55,164 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 [2024-06-21 20:58:55,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:55,165 INFO L229 MonitoredProcess]: Starting monitored process 55 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) [2024-06-21 20:58:55,168 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 (55)] Waiting until timeout for monitored process [2024-06-21 20:58:55,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:58:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:55,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:58:55,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:56,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:56,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235962863] [2024-06-21 20:58:56,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235962863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:56,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:56,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:56,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281366748] [2024-06-21 20:58:56,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:56,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:56,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:56,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:56,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 202 transitions, 1869 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:56,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:56,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:56,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:57,180 INFO L124 PetriNetUnfolderBase]: 2836/4322 cut-off events. [2024-06-21 20:58:57,181 INFO L125 PetriNetUnfolderBase]: For 515555/515555 co-relation queries the response was YES. [2024-06-21 20:58:57,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40066 conditions, 4322 events. 2836/4322 cut-off events. For 515555/515555 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22073 event pairs, 781 based on Foata normal form. 2/4320 useless extension candidates. Maximal degree in co-relation 39988. Up to 4036 conditions per place. [2024-06-21 20:58:57,221 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 191 selfloop transitions, 31 changer transitions 0/229 dead transitions. [2024-06-21 20:58:57,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 229 transitions, 2381 flow [2024-06-21 20:58:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 20:58:57,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2024-06-21 20:58:57,223 INFO L175 Difference]: Start difference. First operand has 173 places, 202 transitions, 1869 flow. Second operand 8 states and 175 transitions. [2024-06-21 20:58:57,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 229 transitions, 2381 flow [2024-06-21 20:58:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 229 transitions, 2243 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:57,487 INFO L231 Difference]: Finished difference. Result has 174 places, 202 transitions, 1801 flow [2024-06-21 20:58:57,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1801, PETRI_PLACES=174, PETRI_TRANSITIONS=202} [2024-06-21 20:58:57,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-21 20:58:57,488 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 202 transitions, 1801 flow [2024-06-21 20:58:57,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:57,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:57,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:57,493 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 (55)] Forceful destruction successful, exit code 0 [2024-06-21 20:58:57,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:58:57,692 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:57,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash -48970670, now seen corresponding path program 8 times [2024-06-21 20:58:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:58:57,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432304795] [2024-06-21 20:58:57,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:58:57,693 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 [2024-06-21 20:58:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:58:57,694 INFO L229 MonitoredProcess]: Starting monitored process 56 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) [2024-06-21 20:58:57,695 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 (56)] Waiting until timeout for monitored process [2024-06-21 20:58:57,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:58:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:58:57,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:58:57,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:58:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:58,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:58:58,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:58:58,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432304795] [2024-06-21 20:58:58,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432304795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:58,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:58,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:58,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349711819] [2024-06-21 20:58:58,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:58,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:58,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:58:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:58,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:58:58,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 202 transitions, 1801 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:58,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:58,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:58:58,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:59,505 INFO L124 PetriNetUnfolderBase]: 2858/4354 cut-off events. [2024-06-21 20:58:59,506 INFO L125 PetriNetUnfolderBase]: For 536104/536104 co-relation queries the response was YES. [2024-06-21 20:58:59,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40461 conditions, 4354 events. 2858/4354 cut-off events. For 536104/536104 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 22279 event pairs, 779 based on Foata normal form. 4/4354 useless extension candidates. Maximal degree in co-relation 40382. Up to 4020 conditions per place. [2024-06-21 20:58:59,550 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 201 selfloop transitions, 29 changer transitions 0/237 dead transitions. [2024-06-21 20:58:59,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 237 transitions, 2614 flow [2024-06-21 20:58:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 20:58:59,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085227272727273 [2024-06-21 20:58:59,553 INFO L175 Difference]: Start difference. First operand has 174 places, 202 transitions, 1801 flow. Second operand 8 states and 179 transitions. [2024-06-21 20:58:59,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 237 transitions, 2614 flow [2024-06-21 20:58:59,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 237 transitions, 2524 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:59,912 INFO L231 Difference]: Finished difference. Result has 175 places, 205 transitions, 1836 flow [2024-06-21 20:58:59,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1836, PETRI_PLACES=175, PETRI_TRANSITIONS=205} [2024-06-21 20:58:59,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-21 20:58:59,913 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 205 transitions, 1836 flow [2024-06-21 20:58:59,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:59,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:59,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:59,918 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 (56)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:00,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:00,114 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:00,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash -40689950, now seen corresponding path program 9 times [2024-06-21 20:59:00,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:00,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829446201] [2024-06-21 20:59:00,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:59:00,114 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 [2024-06-21 20:59:00,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:00,116 INFO L229 MonitoredProcess]: Starting monitored process 57 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) [2024-06-21 20:59:00,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2024-06-21 20:59:00,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:59:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:00,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:59:00,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:01,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:01,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829446201] [2024-06-21 20:59:01,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829446201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:01,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:01,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:01,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708632671] [2024-06-21 20:59:01,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:01,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:01,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:01,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 205 transitions, 1836 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:01,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:01,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:01,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:01,961 INFO L124 PetriNetUnfolderBase]: 2880/4386 cut-off events. [2024-06-21 20:59:01,962 INFO L125 PetriNetUnfolderBase]: For 555345/555345 co-relation queries the response was YES. [2024-06-21 20:59:01,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41041 conditions, 4386 events. 2880/4386 cut-off events. For 555345/555345 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 22501 event pairs, 786 based on Foata normal form. 4/4386 useless extension candidates. Maximal degree in co-relation 40961. Up to 4122 conditions per place. [2024-06-21 20:59:02,010 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 211 selfloop transitions, 19 changer transitions 0/237 dead transitions. [2024-06-21 20:59:02,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 237 transitions, 2437 flow [2024-06-21 20:59:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 20:59:02,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-21 20:59:02,014 INFO L175 Difference]: Start difference. First operand has 175 places, 205 transitions, 1836 flow. Second operand 8 states and 173 transitions. [2024-06-21 20:59:02,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 237 transitions, 2437 flow [2024-06-21 20:59:02,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 237 transitions, 2285 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:02,291 INFO L231 Difference]: Finished difference. Result has 176 places, 208 transitions, 1801 flow [2024-06-21 20:59:02,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1801, PETRI_PLACES=176, PETRI_TRANSITIONS=208} [2024-06-21 20:59:02,292 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-21 20:59:02,292 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 208 transitions, 1801 flow [2024-06-21 20:59:02,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:02,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:02,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:02,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2024-06-21 20:59:02,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:02,495 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:02,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash -270609200, now seen corresponding path program 10 times [2024-06-21 20:59:02,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:02,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981602257] [2024-06-21 20:59:02,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:59:02,495 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 [2024-06-21 20:59:02,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:02,497 INFO L229 MonitoredProcess]: Starting monitored process 58 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) [2024-06-21 20:59:02,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2024-06-21 20:59:02,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:59:02,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:02,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:59:02,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:03,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:03,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:03,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981602257] [2024-06-21 20:59:03,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981602257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:03,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:03,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019621075] [2024-06-21 20:59:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:03,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:03,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 208 transitions, 1801 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:03,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:03,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:03,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:04,331 INFO L124 PetriNetUnfolderBase]: 2870/4372 cut-off events. [2024-06-21 20:59:04,332 INFO L125 PetriNetUnfolderBase]: For 566774/566774 co-relation queries the response was YES. [2024-06-21 20:59:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40845 conditions, 4372 events. 2870/4372 cut-off events. For 566774/566774 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22444 event pairs, 784 based on Foata normal form. 4/4372 useless extension candidates. Maximal degree in co-relation 40764. Up to 4031 conditions per place. [2024-06-21 20:59:04,376 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 200 selfloop transitions, 31 changer transitions 0/238 dead transitions. [2024-06-21 20:59:04,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 238 transitions, 2343 flow [2024-06-21 20:59:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 20:59:04,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-06-21 20:59:04,378 INFO L175 Difference]: Start difference. First operand has 176 places, 208 transitions, 1801 flow. Second operand 8 states and 178 transitions. [2024-06-21 20:59:04,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 238 transitions, 2343 flow [2024-06-21 20:59:04,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 238 transitions, 2233 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 20:59:04,717 INFO L231 Difference]: Finished difference. Result has 178 places, 208 transitions, 1761 flow [2024-06-21 20:59:04,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1761, PETRI_PLACES=178, PETRI_TRANSITIONS=208} [2024-06-21 20:59:04,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-21 20:59:04,717 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 208 transitions, 1761 flow [2024-06-21 20:59:04,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:04,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:04,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:04,723 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 (58)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:04,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:04,921 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:04,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash -502479018, now seen corresponding path program 2 times [2024-06-21 20:59:04,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:04,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613204243] [2024-06-21 20:59:04,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:59:04,922 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 [2024-06-21 20:59:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:04,923 INFO L229 MonitoredProcess]: Starting monitored process 59 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) [2024-06-21 20:59:04,924 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 (59)] Waiting until timeout for monitored process [2024-06-21 20:59:04,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:59:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:04,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 20:59:04,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:05,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:05,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:05,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613204243] [2024-06-21 20:59:05,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613204243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:05,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:05,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:59:05,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37829690] [2024-06-21 20:59:05,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:05,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:59:05,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:05,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:59:05,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:59:05,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:59:05,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 208 transitions, 1761 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:05,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:05,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:59:05,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:06,672 INFO L124 PetriNetUnfolderBase]: 2933/4548 cut-off events. [2024-06-21 20:59:06,673 INFO L125 PetriNetUnfolderBase]: For 656611/656623 co-relation queries the response was YES. [2024-06-21 20:59:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43447 conditions, 4548 events. 2933/4548 cut-off events. For 656611/656623 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23736 event pairs, 919 based on Foata normal form. 9/4522 useless extension candidates. Maximal degree in co-relation 43365. Up to 4164 conditions per place. [2024-06-21 20:59:06,713 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 169 selfloop transitions, 10 changer transitions 0/217 dead transitions. [2024-06-21 20:59:06,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 217 transitions, 2141 flow [2024-06-21 20:59:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:59:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:59:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-21 20:59:06,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-21 20:59:06,715 INFO L175 Difference]: Start difference. First operand has 178 places, 208 transitions, 1761 flow. Second operand 5 states and 111 transitions. [2024-06-21 20:59:06,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 217 transitions, 2141 flow [2024-06-21 20:59:07,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 217 transitions, 2043 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:07,128 INFO L231 Difference]: Finished difference. Result has 176 places, 208 transitions, 1689 flow [2024-06-21 20:59:07,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1689, PETRI_PLACES=176, PETRI_TRANSITIONS=208} [2024-06-21 20:59:07,129 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-21 20:59:07,129 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 208 transitions, 1689 flow [2024-06-21 20:59:07,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:07,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:07,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:07,135 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 (59)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:07,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:07,330 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:07,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1374821972, now seen corresponding path program 1 times [2024-06-21 20:59:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:07,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259682310] [2024-06-21 20:59:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:07,332 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 [2024-06-21 20:59:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:07,334 INFO L229 MonitoredProcess]: Starting monitored process 60 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) [2024-06-21 20:59:07,335 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 (60)] Waiting until timeout for monitored process [2024-06-21 20:59:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:07,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:59:07,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:08,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:08,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:08,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259682310] [2024-06-21 20:59:08,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259682310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:08,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:08,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:59:08,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21350342] [2024-06-21 20:59:08,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:08,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:59:08,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:08,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:59:08,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:59:08,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:08,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 208 transitions, 1689 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:08,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:08,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:08,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:09,261 INFO L124 PetriNetUnfolderBase]: 3204/4867 cut-off events. [2024-06-21 20:59:09,261 INFO L125 PetriNetUnfolderBase]: For 672476/672476 co-relation queries the response was YES. [2024-06-21 20:59:09,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45074 conditions, 4867 events. 3204/4867 cut-off events. For 672476/672476 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 24638 event pairs, 961 based on Foata normal form. 1/4866 useless extension candidates. Maximal degree in co-relation 44991. Up to 4549 conditions per place. [2024-06-21 20:59:09,314 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 185 selfloop transitions, 15 changer transitions 0/227 dead transitions. [2024-06-21 20:59:09,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 227 transitions, 2321 flow [2024-06-21 20:59:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:59:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:59:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-21 20:59:09,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-06-21 20:59:09,315 INFO L175 Difference]: Start difference. First operand has 176 places, 208 transitions, 1689 flow. Second operand 5 states and 113 transitions. [2024-06-21 20:59:09,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 227 transitions, 2321 flow [2024-06-21 20:59:09,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 227 transitions, 2285 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:09,718 INFO L231 Difference]: Finished difference. Result has 177 places, 214 transitions, 1779 flow [2024-06-21 20:59:09,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1779, PETRI_PLACES=177, PETRI_TRANSITIONS=214} [2024-06-21 20:59:09,718 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-21 20:59:09,718 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 214 transitions, 1779 flow [2024-06-21 20:59:09,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:09,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:09,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:09,724 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 (60)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:09,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:09,921 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:09,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2139404314, now seen corresponding path program 2 times [2024-06-21 20:59:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:09,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843705980] [2024-06-21 20:59:09,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:59:09,923 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 [2024-06-21 20:59:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:09,924 INFO L229 MonitoredProcess]: Starting monitored process 61 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) [2024-06-21 20:59:09,925 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 (61)] Waiting until timeout for monitored process [2024-06-21 20:59:09,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:59:09,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:09,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:59:09,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:11,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:11,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:11,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843705980] [2024-06-21 20:59:11,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843705980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:11,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:11,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:59:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703041211] [2024-06-21 20:59:11,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:59:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:11,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:59:11,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:59:11,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:11,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 214 transitions, 1779 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:11,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:11,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:11,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:11,803 INFO L124 PetriNetUnfolderBase]: 3201/4864 cut-off events. [2024-06-21 20:59:11,803 INFO L125 PetriNetUnfolderBase]: For 693461/693464 co-relation queries the response was YES. [2024-06-21 20:59:11,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45762 conditions, 4864 events. 3201/4864 cut-off events. For 693461/693464 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 24617 event pairs, 964 based on Foata normal form. 3/4864 useless extension candidates. Maximal degree in co-relation 45678. Up to 4546 conditions per place. [2024-06-21 20:59:11,928 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 181 selfloop transitions, 15 changer transitions 0/223 dead transitions. [2024-06-21 20:59:11,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 223 transitions, 2193 flow [2024-06-21 20:59:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:59:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:59:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-21 20:59:11,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-21 20:59:11,929 INFO L175 Difference]: Start difference. First operand has 177 places, 214 transitions, 1779 flow. Second operand 5 states and 109 transitions. [2024-06-21 20:59:11,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 223 transitions, 2193 flow [2024-06-21 20:59:12,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 223 transitions, 2123 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-21 20:59:12,267 INFO L231 Difference]: Finished difference. Result has 181 places, 214 transitions, 1745 flow [2024-06-21 20:59:12,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1745, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2024-06-21 20:59:12,268 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-21 20:59:12,268 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 1745 flow [2024-06-21 20:59:12,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:12,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:12,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:12,271 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 (61)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:12,471 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:12,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 895841334, now seen corresponding path program 1 times [2024-06-21 20:59:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34626800] [2024-06-21 20:59:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:12,472 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 [2024-06-21 20:59:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:12,473 INFO L229 MonitoredProcess]: Starting monitored process 62 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) [2024-06-21 20:59:12,486 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 (62)] Waiting until timeout for monitored process [2024-06-21 20:59:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:12,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:59:12,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:13,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:13,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:13,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34626800] [2024-06-21 20:59:13,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34626800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:13,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:13,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828128999] [2024-06-21 20:59:13,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:13,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:13,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:13,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:59:13,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 1745 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:13,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:13,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:59:13,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:14,488 INFO L124 PetriNetUnfolderBase]: 3332/4988 cut-off events. [2024-06-21 20:59:14,488 INFO L125 PetriNetUnfolderBase]: For 717898/717898 co-relation queries the response was YES. [2024-06-21 20:59:14,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47029 conditions, 4988 events. 3332/4988 cut-off events. For 717898/717898 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 24627 event pairs, 948 based on Foata normal form. 4/4989 useless extension candidates. Maximal degree in co-relation 46943. Up to 4773 conditions per place. [2024-06-21 20:59:14,538 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 221 selfloop transitions, 20 changer transitions 0/247 dead transitions. [2024-06-21 20:59:14,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 247 transitions, 2389 flow [2024-06-21 20:59:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:59:14,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 20:59:14,539 INFO L175 Difference]: Start difference. First operand has 181 places, 214 transitions, 1745 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:59:14,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 247 transitions, 2389 flow [2024-06-21 20:59:14,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 247 transitions, 2347 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:14,869 INFO L231 Difference]: Finished difference. Result has 186 places, 219 transitions, 1852 flow [2024-06-21 20:59:14,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1852, PETRI_PLACES=186, PETRI_TRANSITIONS=219} [2024-06-21 20:59:14,870 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-21 20:59:14,870 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 219 transitions, 1852 flow [2024-06-21 20:59:14,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:14,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:14,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:14,875 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 (62)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:15,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:15,074 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:15,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1375098802, now seen corresponding path program 1 times [2024-06-21 20:59:15,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:15,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835351784] [2024-06-21 20:59:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:15,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:15,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:15,076 INFO L229 MonitoredProcess]: Starting monitored process 63 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) [2024-06-21 20:59:15,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2024-06-21 20:59:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:15,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 20:59:15,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:16,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:16,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835351784] [2024-06-21 20:59:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835351784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:16,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:16,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:59:16,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581067971] [2024-06-21 20:59:16,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:16,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:59:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:16,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:59:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:59:16,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:16,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 219 transitions, 1852 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:16,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:16,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:16,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:17,117 INFO L124 PetriNetUnfolderBase]: 3095/4708 cut-off events. [2024-06-21 20:59:17,117 INFO L125 PetriNetUnfolderBase]: For 735485/735497 co-relation queries the response was YES. [2024-06-21 20:59:17,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45951 conditions, 4708 events. 3095/4708 cut-off events. For 735485/735497 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23727 event pairs, 963 based on Foata normal form. 11/4686 useless extension candidates. Maximal degree in co-relation 45863. Up to 4458 conditions per place. [2024-06-21 20:59:17,247 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 185 selfloop transitions, 13 changer transitions 0/234 dead transitions. [2024-06-21 20:59:17,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 234 transitions, 2312 flow [2024-06-21 20:59:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:59:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:59:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 20:59:17,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 20:59:17,248 INFO L175 Difference]: Start difference. First operand has 186 places, 219 transitions, 1852 flow. Second operand 6 states and 125 transitions. [2024-06-21 20:59:17,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 234 transitions, 2312 flow [2024-06-21 20:59:17,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 234 transitions, 2207 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:17,624 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 1821 flow [2024-06-21 20:59:17,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1821, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-21 20:59:17,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-21 20:59:17,625 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 1821 flow [2024-06-21 20:59:17,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:17,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:17,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:17,628 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 (63)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:17,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:17,828 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:17,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -227000536, now seen corresponding path program 1 times [2024-06-21 20:59:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372739394] [2024-06-21 20:59:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:17,829 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 [2024-06-21 20:59:17,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:17,830 INFO L229 MonitoredProcess]: Starting monitored process 64 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) [2024-06-21 20:59:17,860 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 (64)] Waiting until timeout for monitored process [2024-06-21 20:59:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:17,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:59:17,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:19,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:19,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:19,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372739394] [2024-06-21 20:59:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372739394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:19,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:19,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:19,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289778321] [2024-06-21 20:59:19,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:19,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:19,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:19,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:19,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 1821 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:19,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:19,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:19,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:20,304 INFO L124 PetriNetUnfolderBase]: 3173/4826 cut-off events. [2024-06-21 20:59:20,305 INFO L125 PetriNetUnfolderBase]: For 748777/748777 co-relation queries the response was YES. [2024-06-21 20:59:20,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47690 conditions, 4826 events. 3173/4826 cut-off events. For 748777/748777 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 24826 event pairs, 705 based on Foata normal form. 4/4828 useless extension candidates. Maximal degree in co-relation 47601. Up to 4333 conditions per place. [2024-06-21 20:59:20,358 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 227 selfloop transitions, 40 changer transitions 0/275 dead transitions. [2024-06-21 20:59:20,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 275 transitions, 2875 flow [2024-06-21 20:59:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 20:59:20,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-21 20:59:20,360 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 1821 flow. Second operand 10 states and 225 transitions. [2024-06-21 20:59:20,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 275 transitions, 2875 flow [2024-06-21 20:59:20,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 275 transitions, 2823 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:20,937 INFO L231 Difference]: Finished difference. Result has 193 places, 226 transitions, 2024 flow [2024-06-21 20:59:20,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2024, PETRI_PLACES=193, PETRI_TRANSITIONS=226} [2024-06-21 20:59:20,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-21 20:59:20,938 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 226 transitions, 2024 flow [2024-06-21 20:59:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:20,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:20,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:20,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2024-06-21 20:59:21,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:21,141 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:21,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash -225126586, now seen corresponding path program 2 times [2024-06-21 20:59:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136370015] [2024-06-21 20:59:21,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:59:21,142 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 [2024-06-21 20:59:21,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:21,143 INFO L229 MonitoredProcess]: Starting monitored process 65 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) [2024-06-21 20:59:21,145 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 (65)] Waiting until timeout for monitored process [2024-06-21 20:59:21,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:59:21,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:21,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:59:21,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:22,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:22,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136370015] [2024-06-21 20:59:22,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136370015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:22,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:22,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:22,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040393700] [2024-06-21 20:59:22,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:22,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:22,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 226 transitions, 2024 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:22,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:22,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:22,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:23,775 INFO L124 PetriNetUnfolderBase]: 3215/4892 cut-off events. [2024-06-21 20:59:23,775 INFO L125 PetriNetUnfolderBase]: For 785748/785748 co-relation queries the response was YES. [2024-06-21 20:59:23,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49272 conditions, 4892 events. 3215/4892 cut-off events. For 785748/785748 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 25288 event pairs, 869 based on Foata normal form. 4/4894 useless extension candidates. Maximal degree in co-relation 49182. Up to 4500 conditions per place. [2024-06-21 20:59:23,826 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 233 selfloop transitions, 37 changer transitions 0/278 dead transitions. [2024-06-21 20:59:23,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 3094 flow [2024-06-21 20:59:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 20:59:23,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-21 20:59:23,830 INFO L175 Difference]: Start difference. First operand has 193 places, 226 transitions, 2024 flow. Second operand 10 states and 225 transitions. [2024-06-21 20:59:23,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 3094 flow [2024-06-21 20:59:24,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 2887 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-21 20:59:24,223 INFO L231 Difference]: Finished difference. Result has 197 places, 230 transitions, 2074 flow [2024-06-21 20:59:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2074, PETRI_PLACES=197, PETRI_TRANSITIONS=230} [2024-06-21 20:59:24,225 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-21 20:59:24,225 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 230 transitions, 2074 flow [2024-06-21 20:59:24,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:24,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:24,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:24,230 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 (65)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:24,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:24,428 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:24,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:24,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1603802587, now seen corresponding path program 1 times [2024-06-21 20:59:24,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:24,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147609496] [2024-06-21 20:59:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:24,430 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 [2024-06-21 20:59:24,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:24,432 INFO L229 MonitoredProcess]: Starting monitored process 66 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) [2024-06-21 20:59:24,463 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 (66)] Waiting until timeout for monitored process [2024-06-21 20:59:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:24,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:59:24,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:25,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:25,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147609496] [2024-06-21 20:59:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147609496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:25,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:25,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906698932] [2024-06-21 20:59:25,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:25,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:25,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 230 transitions, 2074 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:25,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:25,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:25,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:26,760 INFO L124 PetriNetUnfolderBase]: 3276/4982 cut-off events. [2024-06-21 20:59:26,760 INFO L125 PetriNetUnfolderBase]: For 822054/822054 co-relation queries the response was YES. [2024-06-21 20:59:26,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50321 conditions, 4982 events. 3276/4982 cut-off events. For 822054/822054 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 25829 event pairs, 863 based on Foata normal form. 4/4984 useless extension candidates. Maximal degree in co-relation 50229. Up to 4575 conditions per place. [2024-06-21 20:59:26,819 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 239 selfloop transitions, 38 changer transitions 0/285 dead transitions. [2024-06-21 20:59:26,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 285 transitions, 3186 flow [2024-06-21 20:59:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 20:59:26,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-21 20:59:26,821 INFO L175 Difference]: Start difference. First operand has 197 places, 230 transitions, 2074 flow. Second operand 10 states and 228 transitions. [2024-06-21 20:59:26,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 285 transitions, 3186 flow [2024-06-21 20:59:27,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 285 transitions, 3100 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:59:27,314 INFO L231 Difference]: Finished difference. Result has 201 places, 236 transitions, 2266 flow [2024-06-21 20:59:27,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2266, PETRI_PLACES=201, PETRI_TRANSITIONS=236} [2024-06-21 20:59:27,314 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-21 20:59:27,315 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 236 transitions, 2266 flow [2024-06-21 20:59:27,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:27,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:27,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:27,318 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 (66)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:27,518 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:27,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2069626244, now seen corresponding path program 3 times [2024-06-21 20:59:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:27,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336187517] [2024-06-21 20:59:27,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:59:27,519 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 [2024-06-21 20:59:27,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:27,520 INFO L229 MonitoredProcess]: Starting monitored process 67 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) [2024-06-21 20:59:27,522 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 (67)] Waiting until timeout for monitored process [2024-06-21 20:59:27,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:59:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:27,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:59:27,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:28,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:28,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336187517] [2024-06-21 20:59:28,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336187517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:28,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:28,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920709966] [2024-06-21 20:59:28,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:28,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:28,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:28,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:28,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 236 transitions, 2266 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:28,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:29,960 INFO L124 PetriNetUnfolderBase]: 3268/4975 cut-off events. [2024-06-21 20:59:29,961 INFO L125 PetriNetUnfolderBase]: For 840485/840485 co-relation queries the response was YES. [2024-06-21 20:59:29,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50795 conditions, 4975 events. 3268/4975 cut-off events. For 840485/840485 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 25804 event pairs, 867 based on Foata normal form. 4/4977 useless extension candidates. Maximal degree in co-relation 50701. Up to 4620 conditions per place. [2024-06-21 20:59:30,015 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 239 selfloop transitions, 34 changer transitions 0/281 dead transitions. [2024-06-21 20:59:30,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 2926 flow [2024-06-21 20:59:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-21 20:59:30,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022727272727273 [2024-06-21 20:59:30,017 INFO L175 Difference]: Start difference. First operand has 201 places, 236 transitions, 2266 flow. Second operand 10 states and 221 transitions. [2024-06-21 20:59:30,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 2926 flow [2024-06-21 20:59:30,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 281 transitions, 2740 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-21 20:59:30,436 INFO L231 Difference]: Finished difference. Result has 205 places, 236 transitions, 2155 flow [2024-06-21 20:59:30,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2155, PETRI_PLACES=205, PETRI_TRANSITIONS=236} [2024-06-21 20:59:30,437 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-21 20:59:30,437 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 236 transitions, 2155 flow [2024-06-21 20:59:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:30,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:30,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:30,445 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 (67)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:30,643 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:30,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1982790129, now seen corresponding path program 2 times [2024-06-21 20:59:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438593128] [2024-06-21 20:59:30,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:59:30,644 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 [2024-06-21 20:59:30,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:30,645 INFO L229 MonitoredProcess]: Starting monitored process 68 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) [2024-06-21 20:59:30,662 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 (68)] Waiting until timeout for monitored process [2024-06-21 20:59:30,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:59:30,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:30,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:59:30,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:31,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:31,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:31,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438593128] [2024-06-21 20:59:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438593128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967997509] [2024-06-21 20:59:31,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:32,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:32,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 236 transitions, 2155 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:32,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:32,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:32,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:33,056 INFO L124 PetriNetUnfolderBase]: 3322/5058 cut-off events. [2024-06-21 20:59:33,056 INFO L125 PetriNetUnfolderBase]: For 873527/873527 co-relation queries the response was YES. [2024-06-21 20:59:33,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51770 conditions, 5058 events. 3322/5058 cut-off events. For 873527/873527 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 26389 event pairs, 865 based on Foata normal form. 4/5060 useless extension candidates. Maximal degree in co-relation 51674. Up to 4702 conditions per place. [2024-06-21 20:59:33,113 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 249 selfloop transitions, 27 changer transitions 0/284 dead transitions. [2024-06-21 20:59:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 284 transitions, 3219 flow [2024-06-21 20:59:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 20:59:33,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-21 20:59:33,115 INFO L175 Difference]: Start difference. First operand has 205 places, 236 transitions, 2155 flow. Second operand 9 states and 203 transitions. [2024-06-21 20:59:33,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 284 transitions, 3219 flow [2024-06-21 20:59:33,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 284 transitions, 3146 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:59:33,682 INFO L231 Difference]: Finished difference. Result has 205 places, 242 transitions, 2302 flow [2024-06-21 20:59:33,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2302, PETRI_PLACES=205, PETRI_TRANSITIONS=242} [2024-06-21 20:59:33,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-21 20:59:33,683 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 242 transitions, 2302 flow [2024-06-21 20:59:33,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:33,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:33,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:33,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:33,886 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:33,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1982790284, now seen corresponding path program 4 times [2024-06-21 20:59:33,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:33,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771617117] [2024-06-21 20:59:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:59:33,888 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 [2024-06-21 20:59:33,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:33,889 INFO L229 MonitoredProcess]: Starting monitored process 69 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) [2024-06-21 20:59:33,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2024-06-21 20:59:33,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:59:33,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:33,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:59:33,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:35,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:35,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:35,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771617117] [2024-06-21 20:59:35,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771617117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:35,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:35,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:35,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469573939] [2024-06-21 20:59:35,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:35,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:35,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:35,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:35,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:35,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 242 transitions, 2302 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:35,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:35,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:35,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:36,553 INFO L124 PetriNetUnfolderBase]: 3339/5085 cut-off events. [2024-06-21 20:59:36,553 INFO L125 PetriNetUnfolderBase]: For 899778/899778 co-relation queries the response was YES. [2024-06-21 20:59:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52393 conditions, 5085 events. 3339/5085 cut-off events. For 899778/899778 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26548 event pairs, 879 based on Foata normal form. 4/5087 useless extension candidates. Maximal degree in co-relation 52296. Up to 4776 conditions per place. [2024-06-21 20:59:36,609 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 253 selfloop transitions, 21 changer transitions 0/282 dead transitions. [2024-06-21 20:59:36,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 282 transitions, 3006 flow [2024-06-21 20:59:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 20:59:36,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-21 20:59:36,611 INFO L175 Difference]: Start difference. First operand has 205 places, 242 transitions, 2302 flow. Second operand 9 states and 196 transitions. [2024-06-21 20:59:36,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 282 transitions, 3006 flow [2024-06-21 20:59:37,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 282 transitions, 2914 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:37,223 INFO L231 Difference]: Finished difference. Result has 209 places, 244 transitions, 2323 flow [2024-06-21 20:59:37,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2323, PETRI_PLACES=209, PETRI_TRANSITIONS=244} [2024-06-21 20:59:37,223 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-06-21 20:59:37,223 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 244 transitions, 2323 flow [2024-06-21 20:59:37,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:37,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:37,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:37,226 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 (69)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:37,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:37,427 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:37,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1607373632, now seen corresponding path program 5 times [2024-06-21 20:59:37,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:37,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431601690] [2024-06-21 20:59:37,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 20:59:37,428 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 [2024-06-21 20:59:37,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:37,429 INFO L229 MonitoredProcess]: Starting monitored process 70 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) [2024-06-21 20:59:37,458 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 (70)] Waiting until timeout for monitored process [2024-06-21 20:59:37,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:59:37,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:37,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:59:37,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:38,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:38,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431601690] [2024-06-21 20:59:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431601690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:38,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:38,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:38,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373302232] [2024-06-21 20:59:38,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:38,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:38,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:38,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:38,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:38,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 244 transitions, 2323 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:38,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:38,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:38,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:39,816 INFO L124 PetriNetUnfolderBase]: 3356/5112 cut-off events. [2024-06-21 20:59:39,816 INFO L125 PetriNetUnfolderBase]: For 924914/924914 co-relation queries the response was YES. [2024-06-21 20:59:39,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52900 conditions, 5112 events. 3356/5112 cut-off events. For 924914/924914 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 26766 event pairs, 874 based on Foata normal form. 4/5114 useless extension candidates. Maximal degree in co-relation 52801. Up to 4720 conditions per place. [2024-06-21 20:59:39,877 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 248 selfloop transitions, 31 changer transitions 0/287 dead transitions. [2024-06-21 20:59:39,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 287 transitions, 3305 flow [2024-06-21 20:59:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 20:59:39,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-21 20:59:39,878 INFO L175 Difference]: Start difference. First operand has 209 places, 244 transitions, 2323 flow. Second operand 9 states and 201 transitions. [2024-06-21 20:59:39,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 287 transitions, 3305 flow [2024-06-21 20:59:40,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 287 transitions, 3214 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:40,535 INFO L231 Difference]: Finished difference. Result has 211 places, 246 transitions, 2365 flow [2024-06-21 20:59:40,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2365, PETRI_PLACES=211, PETRI_TRANSITIONS=246} [2024-06-21 20:59:40,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-21 20:59:40,536 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 246 transitions, 2365 flow [2024-06-21 20:59:40,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:40,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:40,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:40,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2024-06-21 20:59:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:40,739 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:40,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1982784549, now seen corresponding path program 3 times [2024-06-21 20:59:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:40,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622133005] [2024-06-21 20:59:40,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 20:59:40,740 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 [2024-06-21 20:59:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:40,742 INFO L229 MonitoredProcess]: Starting monitored process 71 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) [2024-06-21 20:59:40,743 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 (71)] Waiting until timeout for monitored process [2024-06-21 20:59:40,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 20:59:40,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:40,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:59:40,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:41,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:41,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:41,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622133005] [2024-06-21 20:59:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622133005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:41,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:41,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103727573] [2024-06-21 20:59:41,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:41,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:41,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:41,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:41,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:42,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:42,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 246 transitions, 2365 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:42,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:43,240 INFO L124 PetriNetUnfolderBase]: 3346/5098 cut-off events. [2024-06-21 20:59:43,241 INFO L125 PetriNetUnfolderBase]: For 941469/941469 co-relation queries the response was YES. [2024-06-21 20:59:43,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52842 conditions, 5098 events. 3346/5098 cut-off events. For 941469/941469 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26687 event pairs, 870 based on Foata normal form. 4/5100 useless extension candidates. Maximal degree in co-relation 52742. Up to 4775 conditions per place. [2024-06-21 20:59:43,296 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 255 selfloop transitions, 22 changer transitions 0/285 dead transitions. [2024-06-21 20:59:43,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 285 transitions, 3021 flow [2024-06-21 20:59:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 20:59:43,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 20:59:43,298 INFO L175 Difference]: Start difference. First operand has 211 places, 246 transitions, 2365 flow. Second operand 9 states and 198 transitions. [2024-06-21 20:59:43,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 285 transitions, 3021 flow [2024-06-21 20:59:43,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 285 transitions, 2812 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:43,912 INFO L231 Difference]: Finished difference. Result has 212 places, 246 transitions, 2208 flow [2024-06-21 20:59:43,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2208, PETRI_PLACES=212, PETRI_TRANSITIONS=246} [2024-06-21 20:59:43,912 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-21 20:59:43,912 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 246 transitions, 2208 flow [2024-06-21 20:59:43,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:43,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:43,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:43,915 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 (71)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:44,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:44,116 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:44,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash -138430901, now seen corresponding path program 4 times [2024-06-21 20:59:44,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:44,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132599076] [2024-06-21 20:59:44,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 20:59:44,118 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 [2024-06-21 20:59:44,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:44,119 INFO L229 MonitoredProcess]: Starting monitored process 72 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) [2024-06-21 20:59:44,121 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 (72)] Waiting until timeout for monitored process [2024-06-21 20:59:44,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 20:59:44,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:44,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:59:44,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:45,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:45,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:45,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132599076] [2024-06-21 20:59:45,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132599076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:45,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:45,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:45,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082161546] [2024-06-21 20:59:45,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:45,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:45,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:45,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:45,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 246 transitions, 2208 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:45,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:45,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:45,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:46,591 INFO L124 PetriNetUnfolderBase]: 3336/5084 cut-off events. [2024-06-21 20:59:46,591 INFO L125 PetriNetUnfolderBase]: For 956213/956213 co-relation queries the response was YES. [2024-06-21 20:59:46,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52364 conditions, 5084 events. 3336/5084 cut-off events. For 956213/956213 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 26597 event pairs, 868 based on Foata normal form. 4/5086 useless extension candidates. Maximal degree in co-relation 52264. Up to 4698 conditions per place. [2024-06-21 20:59:46,653 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 244 selfloop transitions, 34 changer transitions 0/286 dead transitions. [2024-06-21 20:59:46,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 2870 flow [2024-06-21 20:59:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 20:59:46,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-21 20:59:46,655 INFO L175 Difference]: Start difference. First operand has 212 places, 246 transitions, 2208 flow. Second operand 9 states and 203 transitions. [2024-06-21 20:59:46,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 2870 flow [2024-06-21 20:59:47,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 286 transitions, 2768 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:47,401 INFO L231 Difference]: Finished difference. Result has 213 places, 246 transitions, 2182 flow [2024-06-21 20:59:47,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2182, PETRI_PLACES=213, PETRI_TRANSITIONS=246} [2024-06-21 20:59:47,403 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-21 20:59:47,403 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 246 transitions, 2182 flow [2024-06-21 20:59:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:47,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:47,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:47,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:47,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:47,606 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:47,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:47,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1982934434, now seen corresponding path program 6 times [2024-06-21 20:59:47,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:47,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376129307] [2024-06-21 20:59:47,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 20:59:47,607 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 [2024-06-21 20:59:47,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:47,608 INFO L229 MonitoredProcess]: Starting monitored process 73 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) [2024-06-21 20:59:47,610 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 (73)] Waiting until timeout for monitored process [2024-06-21 20:59:47,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 20:59:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:47,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 20:59:47,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:49,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:49,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376129307] [2024-06-21 20:59:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376129307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:49,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:49,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:49,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398108077] [2024-06-21 20:59:49,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:49,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:49,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:49,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 246 transitions, 2182 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:49,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:49,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:49,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:50,174 INFO L124 PetriNetUnfolderBase]: 3328/5072 cut-off events. [2024-06-21 20:59:50,174 INFO L125 PetriNetUnfolderBase]: For 971758/971758 co-relation queries the response was YES. [2024-06-21 20:59:50,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52300 conditions, 5072 events. 3328/5072 cut-off events. For 971758/971758 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26489 event pairs, 873 based on Foata normal form. 4/5074 useless extension candidates. Maximal degree in co-relation 52199. Up to 4745 conditions per place. [2024-06-21 20:59:50,232 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 250 selfloop transitions, 26 changer transitions 0/284 dead transitions. [2024-06-21 20:59:50,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 284 transitions, 2830 flow [2024-06-21 20:59:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 20:59:50,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 20:59:50,235 INFO L175 Difference]: Start difference. First operand has 213 places, 246 transitions, 2182 flow. Second operand 9 states and 198 transitions. [2024-06-21 20:59:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 284 transitions, 2830 flow [2024-06-21 20:59:50,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 284 transitions, 2656 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 20:59:50,978 INFO L231 Difference]: Finished difference. Result has 213 places, 246 transitions, 2067 flow [2024-06-21 20:59:50,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2067, PETRI_PLACES=213, PETRI_TRANSITIONS=246} [2024-06-21 20:59:50,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-21 20:59:50,992 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 246 transitions, 2067 flow [2024-06-21 20:59:50,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:50,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:50,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:50,998 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 (73)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:51,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:51,194 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:51,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:51,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1591236141, now seen corresponding path program 5 times [2024-06-21 20:59:51,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:51,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625478937] [2024-06-21 20:59:51,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 20:59:51,195 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 [2024-06-21 20:59:51,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:51,196 INFO L229 MonitoredProcess]: Starting monitored process 74 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) [2024-06-21 20:59:51,197 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 (74)] Waiting until timeout for monitored process [2024-06-21 20:59:51,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:59:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:51,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 20:59:51,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:52,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:52,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:52,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625478937] [2024-06-21 20:59:52,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625478937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:52,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:52,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:52,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383815469] [2024-06-21 20:59:52,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:52,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:52,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:52,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:52,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:52,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 246 transitions, 2067 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:52,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:52,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:52,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:53,617 INFO L124 PetriNetUnfolderBase]: 3376/5150 cut-off events. [2024-06-21 20:59:53,617 INFO L125 PetriNetUnfolderBase]: For 1008170/1008173 co-relation queries the response was YES. [2024-06-21 20:59:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53374 conditions, 5150 events. 3376/5150 cut-off events. For 1008170/1008173 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 27137 event pairs, 813 based on Foata normal form. 4/5151 useless extension candidates. Maximal degree in co-relation 53273. Up to 4361 conditions per place. [2024-06-21 20:59:53,675 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 196 selfloop transitions, 96 changer transitions 0/300 dead transitions. [2024-06-21 20:59:53,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 300 transitions, 3619 flow [2024-06-21 20:59:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 20:59:53,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505050505050505 [2024-06-21 20:59:53,676 INFO L175 Difference]: Start difference. First operand has 213 places, 246 transitions, 2067 flow. Second operand 9 states and 218 transitions. [2024-06-21 20:59:53,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 300 transitions, 3619 flow [2024-06-21 20:59:54,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 300 transitions, 3555 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:54,221 INFO L231 Difference]: Finished difference. Result has 215 places, 255 transitions, 2554 flow [2024-06-21 20:59:54,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2554, PETRI_PLACES=215, PETRI_TRANSITIONS=255} [2024-06-21 20:59:54,221 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-21 20:59:54,222 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 255 transitions, 2554 flow [2024-06-21 20:59:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:54,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:54,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:54,227 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 (74)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:54,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:54,425 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:54,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash -859227932, now seen corresponding path program 7 times [2024-06-21 20:59:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:54,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644631119] [2024-06-21 20:59:54,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 20:59:54,426 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 [2024-06-21 20:59:54,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:54,427 INFO L229 MonitoredProcess]: Starting monitored process 75 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) [2024-06-21 20:59:54,428 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 (75)] Waiting until timeout for monitored process [2024-06-21 20:59:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:54,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:59:54,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:55,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:55,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:55,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644631119] [2024-06-21 20:59:55,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644631119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:55,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:55,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:55,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664269047] [2024-06-21 20:59:55,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:55,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:55,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:55,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:55,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 255 transitions, 2554 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:55,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:55,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:55,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:56,937 INFO L124 PetriNetUnfolderBase]: 3393/5177 cut-off events. [2024-06-21 20:59:56,937 INFO L125 PetriNetUnfolderBase]: For 1042994/1042997 co-relation queries the response was YES. [2024-06-21 20:59:56,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55156 conditions, 5177 events. 3393/5177 cut-off events. For 1042994/1042997 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 27283 event pairs, 865 based on Foata normal form. 4/5178 useless extension candidates. Maximal degree in co-relation 55053. Up to 4736 conditions per place. [2024-06-21 20:59:56,999 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 231 selfloop transitions, 53 changer transitions 0/292 dead transitions. [2024-06-21 20:59:56,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 292 transitions, 3300 flow [2024-06-21 20:59:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 20:59:57,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-21 20:59:57,000 INFO L175 Difference]: Start difference. First operand has 215 places, 255 transitions, 2554 flow. Second operand 9 states and 201 transitions. [2024-06-21 20:59:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 292 transitions, 3300 flow [2024-06-21 20:59:57,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 292 transitions, 3118 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:57,700 INFO L231 Difference]: Finished difference. Result has 220 places, 257 transitions, 2579 flow [2024-06-21 20:59:57,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2579, PETRI_PLACES=220, PETRI_TRANSITIONS=257} [2024-06-21 20:59:57,713 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-21 20:59:57,713 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 257 transitions, 2579 flow [2024-06-21 20:59:57,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:57,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:57,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:57,724 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 (75)] Forceful destruction successful, exit code 0 [2024-06-21 20:59:57,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 20:59:57,917 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:57,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1591088116, now seen corresponding path program 8 times [2024-06-21 20:59:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 20:59:57,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455421595] [2024-06-21 20:59:57,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 20:59:57,918 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 [2024-06-21 20:59:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 20:59:57,919 INFO L229 MonitoredProcess]: Starting monitored process 76 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) [2024-06-21 20:59:57,921 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 (76)] Waiting until timeout for monitored process [2024-06-21 20:59:57,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 20:59:57,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 20:59:57,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 20:59:57,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 20:59:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:59,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 20:59:59,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 20:59:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455421595] [2024-06-21 20:59:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455421595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:59,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:59,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:59,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538320901] [2024-06-21 20:59:59,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:59,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:59,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 20:59:59,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:59,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:59,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:59:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 257 transitions, 2579 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:59:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:00,566 INFO L124 PetriNetUnfolderBase]: 3435/5243 cut-off events. [2024-06-21 21:00:00,567 INFO L125 PetriNetUnfolderBase]: For 1083364/1083367 co-relation queries the response was YES. [2024-06-21 21:00:00,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56533 conditions, 5243 events. 3435/5243 cut-off events. For 1083364/1083367 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 27750 event pairs, 862 based on Foata normal form. 4/5244 useless extension candidates. Maximal degree in co-relation 56428. Up to 4705 conditions per place. [2024-06-21 21:00:00,629 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 225 selfloop transitions, 66 changer transitions 0/299 dead transitions. [2024-06-21 21:00:00,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 299 transitions, 3725 flow [2024-06-21 21:00:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 21:00:00,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176767676767676 [2024-06-21 21:00:00,630 INFO L175 Difference]: Start difference. First operand has 220 places, 257 transitions, 2579 flow. Second operand 9 states and 205 transitions. [2024-06-21 21:00:00,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 299 transitions, 3725 flow [2024-06-21 21:00:01,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 299 transitions, 3536 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:01,359 INFO L231 Difference]: Finished difference. Result has 222 places, 261 transitions, 2721 flow [2024-06-21 21:00:01,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2721, PETRI_PLACES=222, PETRI_TRANSITIONS=261} [2024-06-21 21:00:01,360 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-06-21 21:00:01,360 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 261 transitions, 2721 flow [2024-06-21 21:00:01,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:01,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:01,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:01,363 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 (76)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:01,563 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:01,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:01,564 INFO L85 PathProgramCache]: Analyzing trace with hash -859222197, now seen corresponding path program 6 times [2024-06-21 21:00:01,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:01,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609182719] [2024-06-21 21:00:01,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:00:01,565 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 [2024-06-21 21:00:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:01,567 INFO L229 MonitoredProcess]: Starting monitored process 77 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) [2024-06-21 21:00:01,567 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 (77)] Waiting until timeout for monitored process [2024-06-21 21:00:01,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:00:01,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:01,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:01,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:02,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:02,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609182719] [2024-06-21 21:00:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609182719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:02,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:02,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:02,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447425409] [2024-06-21 21:00:02,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:02,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:02,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:02,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:02,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 261 transitions, 2721 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:02,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:02,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:02,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:03,972 INFO L124 PetriNetUnfolderBase]: 3425/5229 cut-off events. [2024-06-21 21:00:03,972 INFO L125 PetriNetUnfolderBase]: For 1101376/1101379 co-relation queries the response was YES. [2024-06-21 21:00:04,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56553 conditions, 5229 events. 3425/5229 cut-off events. For 1101376/1101379 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 27642 event pairs, 825 based on Foata normal form. 4/5230 useless extension candidates. Maximal degree in co-relation 56447. Up to 4473 conditions per place. [2024-06-21 21:00:04,026 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 204 selfloop transitions, 91 changer transitions 0/303 dead transitions. [2024-06-21 21:00:04,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 303 transitions, 3715 flow [2024-06-21 21:00:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 21:00:04,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-06-21 21:00:04,027 INFO L175 Difference]: Start difference. First operand has 222 places, 261 transitions, 2721 flow. Second operand 9 states and 213 transitions. [2024-06-21 21:00:04,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 303 transitions, 3715 flow [2024-06-21 21:00:04,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 303 transitions, 3469 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:04,980 INFO L231 Difference]: Finished difference. Result has 226 places, 261 transitions, 2665 flow [2024-06-21 21:00:04,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2665, PETRI_PLACES=226, PETRI_TRANSITIONS=261} [2024-06-21 21:00:04,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-21 21:00:04,981 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 261 transitions, 2665 flow [2024-06-21 21:00:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:04,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:04,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:04,985 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 (77)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:05,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:05,185 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:05,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1591091836, now seen corresponding path program 9 times [2024-06-21 21:00:05,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:05,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588043677] [2024-06-21 21:00:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:00:05,187 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 [2024-06-21 21:00:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:05,188 INFO L229 MonitoredProcess]: Starting monitored process 78 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) [2024-06-21 21:00:05,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2024-06-21 21:00:05,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:00:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:05,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:00:05,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:06,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:06,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:06,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588043677] [2024-06-21 21:00:06,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588043677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:06,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:06,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775537737] [2024-06-21 21:00:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:06,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:06,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:06,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:06,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 261 transitions, 2665 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:06,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:06,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:06,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:07,846 INFO L124 PetriNetUnfolderBase]: 3444/5257 cut-off events. [2024-06-21 21:00:07,846 INFO L125 PetriNetUnfolderBase]: For 1125902/1125905 co-relation queries the response was YES. [2024-06-21 21:00:07,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57010 conditions, 5257 events. 3444/5257 cut-off events. For 1125902/1125905 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 27871 event pairs, 829 based on Foata normal form. 4/5255 useless extension candidates. Maximal degree in co-relation 56902. Up to 4787 conditions per place. [2024-06-21 21:00:07,909 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 229 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2024-06-21 21:00:07,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 298 transitions, 3391 flow [2024-06-21 21:00:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 21:00:07,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2024-06-21 21:00:07,910 INFO L175 Difference]: Start difference. First operand has 226 places, 261 transitions, 2665 flow. Second operand 9 states and 202 transitions. [2024-06-21 21:00:07,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 298 transitions, 3391 flow [2024-06-21 21:00:08,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 298 transitions, 3197 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:08,743 INFO L231 Difference]: Finished difference. Result has 227 places, 263 transitions, 2662 flow [2024-06-21 21:00:08,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2662, PETRI_PLACES=227, PETRI_TRANSITIONS=263} [2024-06-21 21:00:08,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-21 21:00:08,744 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 263 transitions, 2662 flow [2024-06-21 21:00:08,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:08,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:08,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:08,749 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 (78)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:08,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:08,947 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:08,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1591091991, now seen corresponding path program 7 times [2024-06-21 21:00:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:08,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77556557] [2024-06-21 21:00:08,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:00:08,948 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 [2024-06-21 21:00:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:08,949 INFO L229 MonitoredProcess]: Starting monitored process 79 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) [2024-06-21 21:00:08,975 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 (79)] Waiting until timeout for monitored process [2024-06-21 21:00:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:09,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:09,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:10,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:10,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:10,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77556557] [2024-06-21 21:00:10,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77556557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:10,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:10,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:10,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831289160] [2024-06-21 21:00:10,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:10,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:10,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:10,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:10,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:10,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:10,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 263 transitions, 2662 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:10,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:10,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:10,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:11,452 INFO L124 PetriNetUnfolderBase]: 3496/5339 cut-off events. [2024-06-21 21:00:11,452 INFO L125 PetriNetUnfolderBase]: For 1169790/1169793 co-relation queries the response was YES. [2024-06-21 21:00:11,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58348 conditions, 5339 events. 3496/5339 cut-off events. For 1169790/1169793 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28403 event pairs, 825 based on Foata normal form. 4/5340 useless extension candidates. Maximal degree in co-relation 58239. Up to 4462 conditions per place. [2024-06-21 21:00:11,520 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 197 selfloop transitions, 108 changer transitions 0/313 dead transitions. [2024-06-21 21:00:11,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 313 transitions, 4202 flow [2024-06-21 21:00:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 21:00:11,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547979797979798 [2024-06-21 21:00:11,522 INFO L175 Difference]: Start difference. First operand has 227 places, 263 transitions, 2662 flow. Second operand 9 states and 217 transitions. [2024-06-21 21:00:11,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 313 transitions, 4202 flow [2024-06-21 21:00:12,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 4033 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:12,475 INFO L231 Difference]: Finished difference. Result has 229 places, 269 transitions, 2943 flow [2024-06-21 21:00:12,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2943, PETRI_PLACES=229, PETRI_TRANSITIONS=269} [2024-06-21 21:00:12,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-21 21:00:12,476 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 269 transitions, 2943 flow [2024-06-21 21:00:12,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:12,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:12,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:12,482 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 (79)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:12,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:12,680 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:12,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1596805911, now seen corresponding path program 8 times [2024-06-21 21:00:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057663280] [2024-06-21 21:00:12,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:00:12,681 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 [2024-06-21 21:00:12,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:12,682 INFO L229 MonitoredProcess]: Starting monitored process 80 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) [2024-06-21 21:00:12,683 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 (80)] Waiting until timeout for monitored process [2024-06-21 21:00:12,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:00:12,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:12,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:12,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:14,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:14,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057663280] [2024-06-21 21:00:14,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057663280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:14,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:14,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:14,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282886799] [2024-06-21 21:00:14,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:14,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:14,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 2943 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:14,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:14,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:14,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:15,344 INFO L124 PetriNetUnfolderBase]: 3518/5376 cut-off events. [2024-06-21 21:00:15,344 INFO L125 PetriNetUnfolderBase]: For 1205901/1205904 co-relation queries the response was YES. [2024-06-21 21:00:15,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59667 conditions, 5376 events. 3518/5376 cut-off events. For 1205901/1205904 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 28688 event pairs, 827 based on Foata normal form. 4/5377 useless extension candidates. Maximal degree in co-relation 59557. Up to 4610 conditions per place. [2024-06-21 21:00:15,404 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 211 selfloop transitions, 94 changer transitions 0/313 dead transitions. [2024-06-21 21:00:15,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 313 transitions, 4081 flow [2024-06-21 21:00:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 21:00:15,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-21 21:00:15,406 INFO L175 Difference]: Start difference. First operand has 229 places, 269 transitions, 2943 flow. Second operand 9 states and 210 transitions. [2024-06-21 21:00:15,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 313 transitions, 4081 flow [2024-06-21 21:00:16,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 3794 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:16,134 INFO L231 Difference]: Finished difference. Result has 233 places, 272 transitions, 2974 flow [2024-06-21 21:00:16,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2974, PETRI_PLACES=233, PETRI_TRANSITIONS=272} [2024-06-21 21:00:16,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-21 21:00:16,134 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 272 transitions, 2974 flow [2024-06-21 21:00:16,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:16,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:16,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:16,140 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 (80)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:16,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:16,338 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:16,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1596598366, now seen corresponding path program 10 times [2024-06-21 21:00:16,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:16,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911312162] [2024-06-21 21:00:16,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:00:16,339 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 [2024-06-21 21:00:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:16,341 INFO L229 MonitoredProcess]: Starting monitored process 81 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) [2024-06-21 21:00:16,354 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 (81)] Waiting until timeout for monitored process [2024-06-21 21:00:16,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:00:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:16,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:00:16,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:17,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:17,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911312162] [2024-06-21 21:00:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911312162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:17,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:17,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291831265] [2024-06-21 21:00:17,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:17,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:17,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 272 transitions, 2974 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:17,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:17,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:18,934 INFO L124 PetriNetUnfolderBase]: 3520/5380 cut-off events. [2024-06-21 21:00:18,934 INFO L125 PetriNetUnfolderBase]: For 1223476/1223479 co-relation queries the response was YES. [2024-06-21 21:00:18,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59625 conditions, 5380 events. 3520/5380 cut-off events. For 1223476/1223479 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 28742 event pairs, 823 based on Foata normal form. 4/5381 useless extension candidates. Maximal degree in co-relation 59513. Up to 4931 conditions per place. [2024-06-21 21:00:19,002 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 245 selfloop transitions, 54 changer transitions 0/307 dead transitions. [2024-06-21 21:00:19,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 307 transitions, 3660 flow [2024-06-21 21:00:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 21:00:19,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2024-06-21 21:00:19,003 INFO L175 Difference]: Start difference. First operand has 233 places, 272 transitions, 2974 flow. Second operand 9 states and 200 transitions. [2024-06-21 21:00:19,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 307 transitions, 3660 flow [2024-06-21 21:00:20,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 307 transitions, 3366 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:20,009 INFO L231 Difference]: Finished difference. Result has 235 places, 272 transitions, 2795 flow [2024-06-21 21:00:20,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2795, PETRI_PLACES=235, PETRI_TRANSITIONS=272} [2024-06-21 21:00:20,009 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-21 21:00:20,009 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 272 transitions, 2795 flow [2024-06-21 21:00:20,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:20,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:20,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:20,044 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 (81)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:20,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:20,213 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:20,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash -853859817, now seen corresponding path program 9 times [2024-06-21 21:00:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:20,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905590977] [2024-06-21 21:00:20,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:00:20,214 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 [2024-06-21 21:00:20,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:20,216 INFO L229 MonitoredProcess]: Starting monitored process 82 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) [2024-06-21 21:00:20,217 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 (82)] Waiting until timeout for monitored process [2024-06-21 21:00:20,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:00:20,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:20,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:20,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:21,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:21,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:21,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905590977] [2024-06-21 21:00:21,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905590977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:21,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:21,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:21,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978334253] [2024-06-21 21:00:21,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:21,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:21,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:21,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 272 transitions, 2795 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:21,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:21,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:21,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:22,757 INFO L124 PetriNetUnfolderBase]: 3532/5396 cut-off events. [2024-06-21 21:00:22,758 INFO L125 PetriNetUnfolderBase]: For 1240817/1240820 co-relation queries the response was YES. [2024-06-21 21:00:22,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59323 conditions, 5396 events. 3532/5396 cut-off events. For 1240817/1240820 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 28820 event pairs, 825 based on Foata normal form. 4/5397 useless extension candidates. Maximal degree in co-relation 59210. Up to 4630 conditions per place. [2024-06-21 21:00:22,824 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 217 selfloop transitions, 92 changer transitions 0/317 dead transitions. [2024-06-21 21:00:22,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 317 transitions, 3921 flow [2024-06-21 21:00:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 21:00:22,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5353535353535354 [2024-06-21 21:00:22,826 INFO L175 Difference]: Start difference. First operand has 235 places, 272 transitions, 2795 flow. Second operand 9 states and 212 transitions. [2024-06-21 21:00:22,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 317 transitions, 3921 flow [2024-06-21 21:00:23,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 317 transitions, 3794 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:23,948 INFO L231 Difference]: Finished difference. Result has 236 places, 275 transitions, 2950 flow [2024-06-21 21:00:23,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2950, PETRI_PLACES=236, PETRI_TRANSITIONS=275} [2024-06-21 21:00:23,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-21 21:00:23,949 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 275 transitions, 2950 flow [2024-06-21 21:00:23,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:23,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:23,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:23,954 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 (82)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:24,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:24,152 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:24,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash -853865397, now seen corresponding path program 10 times [2024-06-21 21:00:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:24,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126856608] [2024-06-21 21:00:24,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:00:24,153 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 [2024-06-21 21:00:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:24,154 INFO L229 MonitoredProcess]: Starting monitored process 83 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) [2024-06-21 21:00:24,155 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 (83)] Waiting until timeout for monitored process [2024-06-21 21:00:24,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:00:24,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:24,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:24,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:25,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:25,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126856608] [2024-06-21 21:00:25,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126856608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:25,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:25,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:25,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447474188] [2024-06-21 21:00:25,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:25,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:25,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:25,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:25,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:25,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:25,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 275 transitions, 2950 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:25,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:25,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:25,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:26,810 INFO L124 PetriNetUnfolderBase]: 3522/5377 cut-off events. [2024-06-21 21:00:26,810 INFO L125 PetriNetUnfolderBase]: For 1259021/1259024 co-relation queries the response was YES. [2024-06-21 21:00:26,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59476 conditions, 5377 events. 3522/5377 cut-off events. For 1259021/1259024 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 28711 event pairs, 816 based on Foata normal form. 4/5378 useless extension candidates. Maximal degree in co-relation 59362. Up to 4566 conditions per place. [2024-06-21 21:00:26,871 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 209 selfloop transitions, 100 changer transitions 0/317 dead transitions. [2024-06-21 21:00:26,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 317 transitions, 3996 flow [2024-06-21 21:00:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 21:00:26,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-06-21 21:00:26,873 INFO L175 Difference]: Start difference. First operand has 236 places, 275 transitions, 2950 flow. Second operand 9 states and 213 transitions. [2024-06-21 21:00:26,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 317 transitions, 3996 flow [2024-06-21 21:00:28,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 317 transitions, 3698 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:28,299 INFO L231 Difference]: Finished difference. Result has 238 places, 275 transitions, 2860 flow [2024-06-21 21:00:28,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2860, PETRI_PLACES=238, PETRI_TRANSITIONS=275} [2024-06-21 21:00:28,300 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-21 21:00:28,300 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 275 transitions, 2860 flow [2024-06-21 21:00:28,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:28,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:28,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:28,305 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 (83)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:28,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:28,503 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:28,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1388379464, now seen corresponding path program 1 times [2024-06-21 21:00:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:28,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721010032] [2024-06-21 21:00:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:28,504 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 [2024-06-21 21:00:28,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:28,505 INFO L229 MonitoredProcess]: Starting monitored process 84 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) [2024-06-21 21:00:28,507 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 (84)] Waiting until timeout for monitored process [2024-06-21 21:00:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:28,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:00:28,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:29,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:29,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:29,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721010032] [2024-06-21 21:00:29,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721010032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:29,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:29,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:00:29,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061404758] [2024-06-21 21:00:29,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:29,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:00:29,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:29,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:00:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:00:29,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:29,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 275 transitions, 2860 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:29,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:29,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:29,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:30,575 INFO L124 PetriNetUnfolderBase]: 3559/5423 cut-off events. [2024-06-21 21:00:30,575 INFO L125 PetriNetUnfolderBase]: For 1307561/1307573 co-relation queries the response was YES. [2024-06-21 21:00:30,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59969 conditions, 5423 events. 3559/5423 cut-off events. For 1307561/1307573 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 28482 event pairs, 975 based on Foata normal form. 10/5400 useless extension candidates. Maximal degree in co-relation 59854. Up to 5065 conditions per place. [2024-06-21 21:00:30,646 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 228 selfloop transitions, 24 changer transitions 0/298 dead transitions. [2024-06-21 21:00:30,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 298 transitions, 3654 flow [2024-06-21 21:00:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:00:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:00:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 21:00:30,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-21 21:00:30,647 INFO L175 Difference]: Start difference. First operand has 238 places, 275 transitions, 2860 flow. Second operand 6 states and 134 transitions. [2024-06-21 21:00:30,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 298 transitions, 3654 flow [2024-06-21 21:00:31,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 298 transitions, 3317 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:00:31,850 INFO L231 Difference]: Finished difference. Result has 235 places, 281 transitions, 2667 flow [2024-06-21 21:00:31,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2667, PETRI_PLACES=235, PETRI_TRANSITIONS=281} [2024-06-21 21:00:31,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-21 21:00:31,851 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 281 transitions, 2667 flow [2024-06-21 21:00:31,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:31,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:31,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:31,856 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 (84)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:32,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:32,054 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:32,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:32,054 INFO L85 PathProgramCache]: Analyzing trace with hash -19376339, now seen corresponding path program 11 times [2024-06-21 21:00:32,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:32,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416966865] [2024-06-21 21:00:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:00:32,055 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 [2024-06-21 21:00:32,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:32,056 INFO L229 MonitoredProcess]: Starting monitored process 85 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) [2024-06-21 21:00:32,058 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 (85)] Waiting until timeout for monitored process [2024-06-21 21:00:32,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:00:32,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:32,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:32,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:33,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:33,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416966865] [2024-06-21 21:00:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416966865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:33,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255460215] [2024-06-21 21:00:33,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:33,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:33,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:33,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:33,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 281 transitions, 2667 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:33,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:33,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:33,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:34,593 INFO L124 PetriNetUnfolderBase]: 3552/5419 cut-off events. [2024-06-21 21:00:34,594 INFO L125 PetriNetUnfolderBase]: For 1323053/1323067 co-relation queries the response was YES. [2024-06-21 21:00:34,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59957 conditions, 5419 events. 3552/5419 cut-off events. For 1323053/1323067 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28967 event pairs, 847 based on Foata normal form. 4/5414 useless extension candidates. Maximal degree in co-relation 59842. Up to 4840 conditions per place. [2024-06-21 21:00:34,665 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 249 selfloop transitions, 67 changer transitions 0/326 dead transitions. [2024-06-21 21:00:34,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 326 transitions, 4233 flow [2024-06-21 21:00:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 21:00:34,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176767676767676 [2024-06-21 21:00:34,666 INFO L175 Difference]: Start difference. First operand has 235 places, 281 transitions, 2667 flow. Second operand 9 states and 205 transitions. [2024-06-21 21:00:34,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 326 transitions, 4233 flow [2024-06-21 21:00:36,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 326 transitions, 4184 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 21:00:36,025 INFO L231 Difference]: Finished difference. Result has 243 places, 287 transitions, 2991 flow [2024-06-21 21:00:36,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2991, PETRI_PLACES=243, PETRI_TRANSITIONS=287} [2024-06-21 21:00:36,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-21 21:00:36,026 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 287 transitions, 2991 flow [2024-06-21 21:00:36,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:36,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:36,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:36,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2024-06-21 21:00:36,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:36,229 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:36,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:36,230 INFO L85 PathProgramCache]: Analyzing trace with hash -19382074, now seen corresponding path program 11 times [2024-06-21 21:00:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:36,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571798828] [2024-06-21 21:00:36,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:00:36,230 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 [2024-06-21 21:00:36,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:36,231 INFO L229 MonitoredProcess]: Starting monitored process 86 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) [2024-06-21 21:00:36,233 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 (86)] Waiting until timeout for monitored process [2024-06-21 21:00:36,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:00:36,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:36,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:00:36,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:37,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:37,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571798828] [2024-06-21 21:00:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571798828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:37,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:37,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:37,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654213799] [2024-06-21 21:00:37,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:37,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:37,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:37,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:37,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 287 transitions, 2991 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:37,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:37,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:37,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:38,840 INFO L124 PetriNetUnfolderBase]: 3598/5486 cut-off events. [2024-06-21 21:00:38,841 INFO L125 PetriNetUnfolderBase]: For 1359097/1359097 co-relation queries the response was YES. [2024-06-21 21:00:38,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61777 conditions, 5486 events. 3598/5486 cut-off events. For 1359097/1359097 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 29278 event pairs, 840 based on Foata normal form. 4/5488 useless extension candidates. Maximal degree in co-relation 61659. Up to 5123 conditions per place. [2024-06-21 21:00:38,910 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 277 selfloop transitions, 34 changer transitions 0/321 dead transitions. [2024-06-21 21:00:38,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 321 transitions, 3793 flow [2024-06-21 21:00:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 21:00:38,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-21 21:00:38,911 INFO L175 Difference]: Start difference. First operand has 243 places, 287 transitions, 2991 flow. Second operand 9 states and 193 transitions. [2024-06-21 21:00:38,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 321 transitions, 3793 flow [2024-06-21 21:00:40,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 321 transitions, 3529 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-21 21:00:40,298 INFO L231 Difference]: Finished difference. Result has 246 places, 289 transitions, 2906 flow [2024-06-21 21:00:40,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2906, PETRI_PLACES=246, PETRI_TRANSITIONS=289} [2024-06-21 21:00:40,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-21 21:00:40,299 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 289 transitions, 2906 flow [2024-06-21 21:00:40,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:40,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:40,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:40,305 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 (86)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:40,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:40,503 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:40,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1393652, now seen corresponding path program 12 times [2024-06-21 21:00:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:40,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281300071] [2024-06-21 21:00:40,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:00:40,504 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 [2024-06-21 21:00:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:40,506 INFO L229 MonitoredProcess]: Starting monitored process 87 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) [2024-06-21 21:00:40,507 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 (87)] Waiting until timeout for monitored process [2024-06-21 21:00:40,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:00:40,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:40,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:00:40,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:41,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:41,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:41,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281300071] [2024-06-21 21:00:41,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281300071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:41,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:41,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:41,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80201521] [2024-06-21 21:00:41,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:41,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:41,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:41,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:41,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:41,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 289 transitions, 2906 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:41,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:41,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:41,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:43,021 INFO L124 PetriNetUnfolderBase]: 3588/5470 cut-off events. [2024-06-21 21:00:43,021 INFO L125 PetriNetUnfolderBase]: For 1391453/1391469 co-relation queries the response was YES. [2024-06-21 21:00:43,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61987 conditions, 5470 events. 3588/5470 cut-off events. For 1391453/1391469 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29283 event pairs, 876 based on Foata normal form. 4/5465 useless extension candidates. Maximal degree in co-relation 61868. Up to 5003 conditions per place. [2024-06-21 21:00:43,090 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 268 selfloop transitions, 50 changer transitions 0/328 dead transitions. [2024-06-21 21:00:43,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 328 transitions, 4160 flow [2024-06-21 21:00:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 21:00:43,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-21 21:00:43,092 INFO L175 Difference]: Start difference. First operand has 246 places, 289 transitions, 2906 flow. Second operand 9 states and 197 transitions. [2024-06-21 21:00:43,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 328 transitions, 4160 flow [2024-06-21 21:00:44,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 328 transitions, 3999 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:44,493 INFO L231 Difference]: Finished difference. Result has 248 places, 293 transitions, 3064 flow [2024-06-21 21:00:44,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3064, PETRI_PLACES=248, PETRI_TRANSITIONS=293} [2024-06-21 21:00:44,493 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-21 21:00:44,493 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 293 transitions, 3064 flow [2024-06-21 21:00:44,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:44,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:44,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:44,498 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 (87)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:44,697 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:44,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1261386985, now seen corresponding path program 12 times [2024-06-21 21:00:44,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:44,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063566566] [2024-06-21 21:00:44,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:00:44,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:44,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:44,698 INFO L229 MonitoredProcess]: Starting monitored process 88 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) [2024-06-21 21:00:44,699 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 (88)] Waiting until timeout for monitored process [2024-06-21 21:00:44,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:00:44,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:00:44,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:44,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:45,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:45,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:45,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063566566] [2024-06-21 21:00:45,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063566566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:45,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:45,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47863790] [2024-06-21 21:00:45,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:45,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:45,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:45,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:45,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:45,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:45,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 293 transitions, 3064 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:45,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:45,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:46,976 INFO L124 PetriNetUnfolderBase]: 3613/5512 cut-off events. [2024-06-21 21:00:46,976 INFO L125 PetriNetUnfolderBase]: For 1427185/1427201 co-relation queries the response was YES. [2024-06-21 21:00:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62836 conditions, 5512 events. 3613/5512 cut-off events. For 1427185/1427201 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29683 event pairs, 869 based on Foata normal form. 4/5507 useless extension candidates. Maximal degree in co-relation 62716. Up to 5123 conditions per place. [2024-06-21 21:00:47,050 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 292 selfloop transitions, 32 changer transitions 0/334 dead transitions. [2024-06-21 21:00:47,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 334 transitions, 4586 flow [2024-06-21 21:00:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 21:00:47,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:00:47,052 INFO L175 Difference]: Start difference. First operand has 248 places, 293 transitions, 3064 flow. Second operand 9 states and 198 transitions. [2024-06-21 21:00:47,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 334 transitions, 4586 flow [2024-06-21 21:00:48,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 334 transitions, 4390 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:48,636 INFO L231 Difference]: Finished difference. Result has 252 places, 296 transitions, 3067 flow [2024-06-21 21:00:48,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3067, PETRI_PLACES=252, PETRI_TRANSITIONS=296} [2024-06-21 21:00:48,637 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-21 21:00:48,637 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 296 transitions, 3067 flow [2024-06-21 21:00:48,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:48,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:48,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:48,640 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 (88)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:48,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:48,841 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:48,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1510460949, now seen corresponding path program 1 times [2024-06-21 21:00:48,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:48,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368181025] [2024-06-21 21:00:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:48,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:48,843 INFO L229 MonitoredProcess]: Starting monitored process 89 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) [2024-06-21 21:00:48,870 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 (89)] Waiting until timeout for monitored process [2024-06-21 21:00:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:48,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:00:48,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:50,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:50,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368181025] [2024-06-21 21:00:50,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368181025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:50,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:50,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:50,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637078555] [2024-06-21 21:00:50,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:50,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:50,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:50,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:00:50,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 296 transitions, 3067 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:50,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:50,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:00:50,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:51,287 INFO L124 PetriNetUnfolderBase]: 3978/5947 cut-off events. [2024-06-21 21:00:51,287 INFO L125 PetriNetUnfolderBase]: For 1469414/1469414 co-relation queries the response was YES. [2024-06-21 21:00:51,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65898 conditions, 5947 events. 3978/5947 cut-off events. For 1469414/1469414 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 30511 event pairs, 968 based on Foata normal form. 2/5947 useless extension candidates. Maximal degree in co-relation 65776. Up to 5716 conditions per place. [2024-06-21 21:00:51,363 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 295 selfloop transitions, 24 changer transitions 0/327 dead transitions. [2024-06-21 21:00:51,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 327 transitions, 3813 flow [2024-06-21 21:00:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:00:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:00:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 21:00:51,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 21:00:51,364 INFO L175 Difference]: Start difference. First operand has 252 places, 296 transitions, 3067 flow. Second operand 8 states and 166 transitions. [2024-06-21 21:00:51,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 327 transitions, 3813 flow [2024-06-21 21:00:52,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 327 transitions, 3528 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:52,787 INFO L231 Difference]: Finished difference. Result has 253 places, 299 transitions, 2884 flow [2024-06-21 21:00:52,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2884, PETRI_PLACES=253, PETRI_TRANSITIONS=299} [2024-06-21 21:00:52,788 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-21 21:00:52,788 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 299 transitions, 2884 flow [2024-06-21 21:00:52,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:52,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:52,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:52,793 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 (89)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:52,991 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:52,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1518095040, now seen corresponding path program 13 times [2024-06-21 21:00:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:52,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808733455] [2024-06-21 21:00:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:00:52,992 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 [2024-06-21 21:00:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:52,993 INFO L229 MonitoredProcess]: Starting monitored process 90 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) [2024-06-21 21:00:52,994 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 (90)] Waiting until timeout for monitored process [2024-06-21 21:00:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:53,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:00:53,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:54,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:54,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:54,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808733455] [2024-06-21 21:00:54,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808733455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:54,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:54,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179360333] [2024-06-21 21:00:54,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:54,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:54,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:54,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:54,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:54,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:54,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 299 transitions, 2884 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:54,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:54,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:54,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:55,445 INFO L124 PetriNetUnfolderBase]: 3679/5612 cut-off events. [2024-06-21 21:00:55,446 INFO L125 PetriNetUnfolderBase]: For 1475272/1475272 co-relation queries the response was YES. [2024-06-21 21:00:55,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63430 conditions, 5612 events. 3679/5612 cut-off events. For 1475272/1475272 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 30147 event pairs, 855 based on Foata normal form. 4/5614 useless extension candidates. Maximal degree in co-relation 63307. Up to 5294 conditions per place. [2024-06-21 21:00:55,522 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 302 selfloop transitions, 21 changer transitions 0/333 dead transitions. [2024-06-21 21:00:55,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 333 transitions, 3674 flow [2024-06-21 21:00:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 21:00:55,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 21:00:55,523 INFO L175 Difference]: Start difference. First operand has 253 places, 299 transitions, 2884 flow. Second operand 9 states and 190 transitions. [2024-06-21 21:00:55,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 333 transitions, 3674 flow [2024-06-21 21:00:56,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 333 transitions, 3622 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:56,733 INFO L231 Difference]: Finished difference. Result has 255 places, 301 transitions, 2949 flow [2024-06-21 21:00:56,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2949, PETRI_PLACES=255, PETRI_TRANSITIONS=301} [2024-06-21 21:00:56,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-21 21:00:56,733 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 301 transitions, 2949 flow [2024-06-21 21:00:56,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:56,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:56,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:56,739 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 (90)] Forceful destruction successful, exit code 0 [2024-06-21 21:00:56,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:00:56,937 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:56,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1518094885, now seen corresponding path program 13 times [2024-06-21 21:00:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:00:56,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688455867] [2024-06-21 21:00:56,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:00:56,938 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 [2024-06-21 21:00:56,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:00:56,939 INFO L229 MonitoredProcess]: Starting monitored process 91 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) [2024-06-21 21:00:56,948 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 (91)] Waiting until timeout for monitored process [2024-06-21 21:00:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:56,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:00:56,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:00:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:58,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:00:58,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:00:58,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688455867] [2024-06-21 21:00:58,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688455867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:58,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:58,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:58,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752825471] [2024-06-21 21:00:58,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:58,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:58,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:00:58,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:58,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:00:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 301 transitions, 2949 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:00:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:59,550 INFO L124 PetriNetUnfolderBase]: 3733/5695 cut-off events. [2024-06-21 21:00:59,551 INFO L125 PetriNetUnfolderBase]: For 1529714/1529714 co-relation queries the response was YES. [2024-06-21 21:00:59,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65152 conditions, 5695 events. 3733/5695 cut-off events. For 1529714/1529714 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 30789 event pairs, 845 based on Foata normal form. 4/5697 useless extension candidates. Maximal degree in co-relation 65028. Up to 5114 conditions per place. [2024-06-21 21:00:59,616 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 280 selfloop transitions, 56 changer transitions 0/346 dead transitions. [2024-06-21 21:00:59,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 346 transitions, 4655 flow [2024-06-21 21:00:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 21:00:59,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-21 21:00:59,617 INFO L175 Difference]: Start difference. First operand has 255 places, 301 transitions, 2949 flow. Second operand 9 states and 203 transitions. [2024-06-21 21:00:59,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 346 transitions, 4655 flow [2024-06-21 21:01:01,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 346 transitions, 4560 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:01,161 INFO L231 Difference]: Finished difference. Result has 257 places, 307 transitions, 3232 flow [2024-06-21 21:01:01,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3232, PETRI_PLACES=257, PETRI_TRANSITIONS=307} [2024-06-21 21:01:01,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-21 21:01:01,162 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 307 transitions, 3232 flow [2024-06-21 21:01:01,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:01,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:01,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:01,167 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 (91)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:01,365 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:01,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1518089305, now seen corresponding path program 14 times [2024-06-21 21:01:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179366407] [2024-06-21 21:01:01,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:01:01,366 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 [2024-06-21 21:01:01,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:01,367 INFO L229 MonitoredProcess]: Starting monitored process 92 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) [2024-06-21 21:01:01,368 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 (92)] Waiting until timeout for monitored process [2024-06-21 21:01:01,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:01:01,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:01,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:01:01,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:02,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:02,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179366407] [2024-06-21 21:01:02,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179366407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:02,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:02,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80750175] [2024-06-21 21:01:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:02,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:02,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:02,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:02,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 307 transitions, 3232 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:02,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:02,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:02,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:03,792 INFO L124 PetriNetUnfolderBase]: 3755/5727 cut-off events. [2024-06-21 21:01:03,792 INFO L125 PetriNetUnfolderBase]: For 1570604/1570604 co-relation queries the response was YES. [2024-06-21 21:01:03,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66402 conditions, 5727 events. 3755/5727 cut-off events. For 1570604/1570604 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 30966 event pairs, 847 based on Foata normal form. 4/5729 useless extension candidates. Maximal degree in co-relation 66277. Up to 5233 conditions per place. [2024-06-21 21:01:03,868 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 289 selfloop transitions, 48 changer transitions 0/347 dead transitions. [2024-06-21 21:01:03,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 347 transitions, 4480 flow [2024-06-21 21:01:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 21:01:03,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2024-06-21 21:01:03,870 INFO L175 Difference]: Start difference. First operand has 257 places, 307 transitions, 3232 flow. Second operand 9 states and 200 transitions. [2024-06-21 21:01:03,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 347 transitions, 4480 flow [2024-06-21 21:01:05,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 347 transitions, 4213 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:05,179 INFO L231 Difference]: Finished difference. Result has 261 places, 310 transitions, 3207 flow [2024-06-21 21:01:05,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3207, PETRI_PLACES=261, PETRI_TRANSITIONS=310} [2024-06-21 21:01:05,179 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-21 21:01:05,179 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 310 transitions, 3207 flow [2024-06-21 21:01:05,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:05,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:05,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:05,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:05,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:05,383 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:05,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1517887495, now seen corresponding path program 15 times [2024-06-21 21:01:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:05,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171485857] [2024-06-21 21:01:05,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:01:05,384 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 [2024-06-21 21:01:05,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:05,385 INFO L229 MonitoredProcess]: Starting monitored process 93 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) [2024-06-21 21:01:05,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2024-06-21 21:01:05,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:01:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:05,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:01:05,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:06,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:06,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171485857] [2024-06-21 21:01:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171485857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:06,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:06,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:06,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759819611] [2024-06-21 21:01:06,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:06,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:06,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:06,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:06,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 310 transitions, 3207 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:06,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:06,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:07,862 INFO L124 PetriNetUnfolderBase]: 3745/5713 cut-off events. [2024-06-21 21:01:07,862 INFO L125 PetriNetUnfolderBase]: For 1580466/1580466 co-relation queries the response was YES. [2024-06-21 21:01:07,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65872 conditions, 5713 events. 3745/5713 cut-off events. For 1580466/1580466 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 30882 event pairs, 850 based on Foata normal form. 4/5715 useless extension candidates. Maximal degree in co-relation 65745. Up to 5219 conditions per place. [2024-06-21 21:01:07,939 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 292 selfloop transitions, 45 changer transitions 0/347 dead transitions. [2024-06-21 21:01:07,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 347 transitions, 4327 flow [2024-06-21 21:01:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 21:01:07,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-21 21:01:07,941 INFO L175 Difference]: Start difference. First operand has 261 places, 310 transitions, 3207 flow. Second operand 9 states and 201 transitions. [2024-06-21 21:01:07,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 347 transitions, 4327 flow [2024-06-21 21:01:09,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 347 transitions, 4103 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:09,473 INFO L231 Difference]: Finished difference. Result has 263 places, 310 transitions, 3081 flow [2024-06-21 21:01:09,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3081, PETRI_PLACES=263, PETRI_TRANSITIONS=310} [2024-06-21 21:01:09,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-21 21:01:09,489 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 310 transitions, 3081 flow [2024-06-21 21:01:09,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:09,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:09,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:09,494 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 (93)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:09,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:09,692 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:09,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1541677, now seen corresponding path program 16 times [2024-06-21 21:01:09,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:09,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326731153] [2024-06-21 21:01:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:01:09,693 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 [2024-06-21 21:01:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:09,694 INFO L229 MonitoredProcess]: Starting monitored process 94 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) [2024-06-21 21:01:09,700 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 (94)] Waiting until timeout for monitored process [2024-06-21 21:01:09,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:01:09,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:09,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:01:09,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:10,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:10,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326731153] [2024-06-21 21:01:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326731153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:10,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096726967] [2024-06-21 21:01:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:10,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:11,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:11,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 310 transitions, 3081 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:11,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:11,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:11,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:12,326 INFO L124 PetriNetUnfolderBase]: 3767/5750 cut-off events. [2024-06-21 21:01:12,326 INFO L125 PetriNetUnfolderBase]: For 1614913/1614913 co-relation queries the response was YES. [2024-06-21 21:01:12,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66316 conditions, 5750 events. 3767/5750 cut-off events. For 1614913/1614913 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 31131 event pairs, 835 based on Foata normal form. 4/5752 useless extension candidates. Maximal degree in co-relation 66188. Up to 5102 conditions per place. [2024-06-21 21:01:12,401 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 266 selfloop transitions, 75 changer transitions 0/351 dead transitions. [2024-06-21 21:01:12,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 351 transitions, 4349 flow [2024-06-21 21:01:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 21:01:12,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2024-06-21 21:01:12,402 INFO L175 Difference]: Start difference. First operand has 263 places, 310 transitions, 3081 flow. Second operand 9 states and 206 transitions. [2024-06-21 21:01:12,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 351 transitions, 4349 flow [2024-06-21 21:01:13,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 351 transitions, 4224 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:13,771 INFO L231 Difference]: Finished difference. Result has 264 places, 313 transitions, 3252 flow [2024-06-21 21:01:13,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3252, PETRI_PLACES=264, PETRI_TRANSITIONS=313} [2024-06-21 21:01:13,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-21 21:01:13,772 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 313 transitions, 3252 flow [2024-06-21 21:01:13,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:13,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:13,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:13,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2024-06-21 21:01:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:13,975 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:13,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1397527, now seen corresponding path program 17 times [2024-06-21 21:01:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526089010] [2024-06-21 21:01:13,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:01:13,976 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 [2024-06-21 21:01:13,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:13,977 INFO L229 MonitoredProcess]: Starting monitored process 95 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) [2024-06-21 21:01:14,008 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 (95)] Waiting until timeout for monitored process [2024-06-21 21:01:14,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:01:14,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:14,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:01:14,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:15,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:15,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:15,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526089010] [2024-06-21 21:01:15,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526089010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:15,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:15,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:15,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729406374] [2024-06-21 21:01:15,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:15,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:15,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:15,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 313 transitions, 3252 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:15,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:15,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:15,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:16,485 INFO L124 PetriNetUnfolderBase]: 3789/5782 cut-off events. [2024-06-21 21:01:16,485 INFO L125 PetriNetUnfolderBase]: For 1655224/1655224 co-relation queries the response was YES. [2024-06-21 21:01:16,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67561 conditions, 5782 events. 3789/5782 cut-off events. For 1655224/1655224 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 31354 event pairs, 833 based on Foata normal form. 4/5784 useless extension candidates. Maximal degree in co-relation 67432. Up to 4928 conditions per place. [2024-06-21 21:01:16,568 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 247 selfloop transitions, 101 changer transitions 0/358 dead transitions. [2024-06-21 21:01:16,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 358 transitions, 5038 flow [2024-06-21 21:01:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 21:01:16,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-21 21:01:16,570 INFO L175 Difference]: Start difference. First operand has 264 places, 313 transitions, 3252 flow. Second operand 9 states and 207 transitions. [2024-06-21 21:01:16,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 358 transitions, 5038 flow [2024-06-21 21:01:17,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 358 transitions, 4766 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:17,948 INFO L231 Difference]: Finished difference. Result has 266 places, 319 transitions, 3472 flow [2024-06-21 21:01:17,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3472, PETRI_PLACES=266, PETRI_TRANSITIONS=319} [2024-06-21 21:01:17,949 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-21 21:01:17,949 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 319 transitions, 3472 flow [2024-06-21 21:01:17,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:17,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:17,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:17,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Ended with exit code 0 [2024-06-21 21:01:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:18,152 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:18,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 6909637, now seen corresponding path program 18 times [2024-06-21 21:01:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:18,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456134240] [2024-06-21 21:01:18,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:01:18,153 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 [2024-06-21 21:01:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:18,154 INFO L229 MonitoredProcess]: Starting monitored process 96 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) [2024-06-21 21:01:18,156 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 (96)] Waiting until timeout for monitored process [2024-06-21 21:01:18,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:01:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:18,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:01:18,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:19,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:19,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:19,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456134240] [2024-06-21 21:01:19,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456134240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:19,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:19,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:19,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192912586] [2024-06-21 21:01:19,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:19,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:19,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:19,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:19,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:19,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:19,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 319 transitions, 3472 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:19,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:19,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:19,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:20,630 INFO L124 PetriNetUnfolderBase]: 3811/5819 cut-off events. [2024-06-21 21:01:20,630 INFO L125 PetriNetUnfolderBase]: For 1695309/1695309 co-relation queries the response was YES. [2024-06-21 21:01:20,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68569 conditions, 5819 events. 3811/5819 cut-off events. For 1695309/1695309 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 31574 event pairs, 845 based on Foata normal form. 4/5821 useless extension candidates. Maximal degree in co-relation 68439. Up to 5193 conditions per place. [2024-06-21 21:01:20,713 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 285 selfloop transitions, 65 changer transitions 0/360 dead transitions. [2024-06-21 21:01:20,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 360 transitions, 4778 flow [2024-06-21 21:01:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 21:01:20,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2024-06-21 21:01:20,715 INFO L175 Difference]: Start difference. First operand has 266 places, 319 transitions, 3472 flow. Second operand 9 states and 206 transitions. [2024-06-21 21:01:20,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 360 transitions, 4778 flow [2024-06-21 21:01:22,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 360 transitions, 4465 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:22,455 INFO L231 Difference]: Finished difference. Result has 270 places, 322 transitions, 3447 flow [2024-06-21 21:01:22,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3447, PETRI_PLACES=270, PETRI_TRANSITIONS=322} [2024-06-21 21:01:22,456 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-21 21:01:22,456 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 322 transitions, 3447 flow [2024-06-21 21:01:22,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:22,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:22,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:22,462 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 (96)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:22,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:22,660 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:22,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1397372, now seen corresponding path program 14 times [2024-06-21 21:01:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:22,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395685515] [2024-06-21 21:01:22,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:01:22,661 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 [2024-06-21 21:01:22,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:22,662 INFO L229 MonitoredProcess]: Starting monitored process 97 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) [2024-06-21 21:01:22,663 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 (97)] Waiting until timeout for monitored process [2024-06-21 21:01:22,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:01:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:22,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:01:22,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:23,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:23,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:23,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395685515] [2024-06-21 21:01:23,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395685515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:23,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:23,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566552072] [2024-06-21 21:01:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:24,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:24,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 322 transitions, 3447 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:24,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:24,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:24,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:25,268 INFO L124 PetriNetUnfolderBase]: 3828/5846 cut-off events. [2024-06-21 21:01:25,268 INFO L125 PetriNetUnfolderBase]: For 1716544/1716544 co-relation queries the response was YES. [2024-06-21 21:01:25,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68435 conditions, 5846 events. 3828/5846 cut-off events. For 1716544/1716544 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 31789 event pairs, 870 based on Foata normal form. 4/5848 useless extension candidates. Maximal degree in co-relation 68303. Up to 5432 conditions per place. [2024-06-21 21:01:25,354 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 301 selfloop transitions, 45 changer transitions 0/356 dead transitions. [2024-06-21 21:01:25,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 356 transitions, 4287 flow [2024-06-21 21:01:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 21:01:25,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-21 21:01:25,355 INFO L175 Difference]: Start difference. First operand has 270 places, 322 transitions, 3447 flow. Second operand 9 states and 194 transitions. [2024-06-21 21:01:25,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 356 transitions, 4287 flow [2024-06-21 21:01:27,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 356 transitions, 4075 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:27,759 INFO L231 Difference]: Finished difference. Result has 272 places, 324 transitions, 3404 flow [2024-06-21 21:01:27,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3404, PETRI_PLACES=272, PETRI_TRANSITIONS=324} [2024-06-21 21:01:27,759 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-21 21:01:27,760 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 324 transitions, 3404 flow [2024-06-21 21:01:27,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:27,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:27,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:27,765 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 (97)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:27,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:27,963 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:27,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 6904057, now seen corresponding path program 19 times [2024-06-21 21:01:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:27,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747144257] [2024-06-21 21:01:27,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:01:27,964 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 [2024-06-21 21:01:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:27,965 INFO L229 MonitoredProcess]: Starting monitored process 98 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) [2024-06-21 21:01:27,966 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 (98)] Waiting until timeout for monitored process [2024-06-21 21:01:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:28,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:01:28,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:29,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:29,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:29,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747144257] [2024-06-21 21:01:29,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747144257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:29,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:29,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198514115] [2024-06-21 21:01:29,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:29,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:29,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:29,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 324 transitions, 3404 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:29,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:29,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:29,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:30,569 INFO L124 PetriNetUnfolderBase]: 3850/5878 cut-off events. [2024-06-21 21:01:30,569 INFO L125 PetriNetUnfolderBase]: For 1751415/1751415 co-relation queries the response was YES. [2024-06-21 21:01:30,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68820 conditions, 5878 events. 3850/5878 cut-off events. For 1751415/1751415 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32008 event pairs, 843 based on Foata normal form. 4/5880 useless extension candidates. Maximal degree in co-relation 68687. Up to 5196 conditions per place. [2024-06-21 21:01:30,645 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 284 selfloop transitions, 73 changer transitions 0/367 dead transitions. [2024-06-21 21:01:30,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 367 transitions, 5064 flow [2024-06-21 21:01:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 21:01:30,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-21 21:01:30,646 INFO L175 Difference]: Start difference. First operand has 272 places, 324 transitions, 3404 flow. Second operand 9 states and 209 transitions. [2024-06-21 21:01:30,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 367 transitions, 5064 flow [2024-06-21 21:01:32,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 367 transitions, 4917 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:32,541 INFO L231 Difference]: Finished difference. Result has 274 places, 327 transitions, 3515 flow [2024-06-21 21:01:32,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3515, PETRI_PLACES=274, PETRI_TRANSITIONS=327} [2024-06-21 21:01:32,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-21 21:01:32,541 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 327 transitions, 3515 flow [2024-06-21 21:01:32,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:32,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:32,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:32,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Ended with exit code 0 [2024-06-21 21:01:32,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:32,745 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:32,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:32,745 INFO L85 PathProgramCache]: Analyzing trace with hash 7111447, now seen corresponding path program 20 times [2024-06-21 21:01:32,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:32,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230394079] [2024-06-21 21:01:32,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:01:32,745 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 [2024-06-21 21:01:32,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:32,747 INFO L229 MonitoredProcess]: Starting monitored process 99 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) [2024-06-21 21:01:32,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2024-06-21 21:01:32,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:01:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:32,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:01:32,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:34,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:34,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:34,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230394079] [2024-06-21 21:01:34,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230394079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:34,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:34,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:34,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664027953] [2024-06-21 21:01:34,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:34,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:34,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:34,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:34,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:34,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 327 transitions, 3515 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:34,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:34,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:34,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:35,444 INFO L124 PetriNetUnfolderBase]: 3840/5864 cut-off events. [2024-06-21 21:01:35,444 INFO L125 PetriNetUnfolderBase]: For 1768357/1768357 co-relation queries the response was YES. [2024-06-21 21:01:35,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68699 conditions, 5864 events. 3840/5864 cut-off events. For 1768357/1768357 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31907 event pairs, 843 based on Foata normal form. 4/5866 useless extension candidates. Maximal degree in co-relation 68565. Up to 5238 conditions per place. [2024-06-21 21:01:35,525 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 288 selfloop transitions, 66 changer transitions 0/364 dead transitions. [2024-06-21 21:01:35,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 364 transitions, 4693 flow [2024-06-21 21:01:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 21:01:35,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-06-21 21:01:35,526 INFO L175 Difference]: Start difference. First operand has 274 places, 327 transitions, 3515 flow. Second operand 9 states and 204 transitions. [2024-06-21 21:01:35,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 364 transitions, 4693 flow [2024-06-21 21:01:37,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 364 transitions, 4302 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:37,727 INFO L231 Difference]: Finished difference. Result has 275 places, 327 transitions, 3264 flow [2024-06-21 21:01:37,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3264, PETRI_PLACES=275, PETRI_TRANSITIONS=327} [2024-06-21 21:01:37,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-21 21:01:37,728 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 327 transitions, 3264 flow [2024-06-21 21:01:37,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:37,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:37,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:37,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Ended with exit code 0 [2024-06-21 21:01:37,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:37,931 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:37,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash 6903902, now seen corresponding path program 15 times [2024-06-21 21:01:37,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:37,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643190990] [2024-06-21 21:01:37,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:01:37,932 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 [2024-06-21 21:01:37,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:37,933 INFO L229 MonitoredProcess]: Starting monitored process 100 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) [2024-06-21 21:01:37,933 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 (100)] Waiting until timeout for monitored process [2024-06-21 21:01:37,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:01:37,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:37,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:01:37,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:39,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:39,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:39,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643190990] [2024-06-21 21:01:39,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643190990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:39,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:39,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:39,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689299227] [2024-06-21 21:01:39,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:39,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:39,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:39,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:39,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:39,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 327 transitions, 3264 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:39,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:39,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:39,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:40,549 INFO L124 PetriNetUnfolderBase]: 3832/5852 cut-off events. [2024-06-21 21:01:40,549 INFO L125 PetriNetUnfolderBase]: For 1780803/1780803 co-relation queries the response was YES. [2024-06-21 21:01:40,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67799 conditions, 5852 events. 3832/5852 cut-off events. For 1780803/1780803 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31862 event pairs, 871 based on Foata normal form. 4/5854 useless extension candidates. Maximal degree in co-relation 67665. Up to 5474 conditions per place. [2024-06-21 21:01:40,632 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 316 selfloop transitions, 33 changer transitions 0/359 dead transitions. [2024-06-21 21:01:40,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 359 transitions, 4042 flow [2024-06-21 21:01:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 21:01:40,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-21 21:01:40,634 INFO L175 Difference]: Start difference. First operand has 275 places, 327 transitions, 3264 flow. Second operand 9 states and 194 transitions. [2024-06-21 21:01:40,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 359 transitions, 4042 flow [2024-06-21 21:01:43,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 359 transitions, 3840 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:43,532 INFO L231 Difference]: Finished difference. Result has 276 places, 327 transitions, 3135 flow [2024-06-21 21:01:43,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3135, PETRI_PLACES=276, PETRI_TRANSITIONS=327} [2024-06-21 21:01:43,533 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-21 21:01:43,533 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 327 transitions, 3135 flow [2024-06-21 21:01:43,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:43,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:43,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:43,539 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 (100)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:43,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:43,737 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:43,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1402189034, now seen corresponding path program 2 times [2024-06-21 21:01:43,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382423087] [2024-06-21 21:01:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:01:43,738 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 [2024-06-21 21:01:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:43,740 INFO L229 MonitoredProcess]: Starting monitored process 101 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) [2024-06-21 21:01:43,744 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 (101)] Waiting until timeout for monitored process [2024-06-21 21:01:43,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:01:43,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:43,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:01:43,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:44,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:44,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382423087] [2024-06-21 21:01:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382423087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:44,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:44,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:01:44,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127059095] [2024-06-21 21:01:44,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:44,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:01:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:01:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:01:44,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:44,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 327 transitions, 3135 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:44,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:44,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:44,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:45,939 INFO L124 PetriNetUnfolderBase]: 3906/5956 cut-off events. [2024-06-21 21:01:45,940 INFO L125 PetriNetUnfolderBase]: For 1831435/1831457 co-relation queries the response was YES. [2024-06-21 21:01:45,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67839 conditions, 5956 events. 3906/5956 cut-off events. For 1831435/1831457 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31970 event pairs, 1017 based on Foata normal form. 9/5928 useless extension candidates. Maximal degree in co-relation 67704. Up to 5596 conditions per place. [2024-06-21 21:01:46,030 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 270 selfloop transitions, 18 changer transitions 0/341 dead transitions. [2024-06-21 21:01:46,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 341 transitions, 3983 flow [2024-06-21 21:01:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:01:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:01:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 21:01:46,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 21:01:46,031 INFO L175 Difference]: Start difference. First operand has 276 places, 327 transitions, 3135 flow. Second operand 6 states and 126 transitions. [2024-06-21 21:01:46,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 341 transitions, 3983 flow [2024-06-21 21:01:48,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 341 transitions, 3891 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:48,566 INFO L231 Difference]: Finished difference. Result has 274 places, 330 transitions, 3133 flow [2024-06-21 21:01:48,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3133, PETRI_PLACES=274, PETRI_TRANSITIONS=330} [2024-06-21 21:01:48,566 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-21 21:01:48,566 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 330 transitions, 3133 flow [2024-06-21 21:01:48,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:48,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:48,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:48,570 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 (101)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:48,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:48,770 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:48,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash -321625902, now seen corresponding path program 3 times [2024-06-21 21:01:48,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:48,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614026543] [2024-06-21 21:01:48,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:01:48,771 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 [2024-06-21 21:01:48,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:48,773 INFO L229 MonitoredProcess]: Starting monitored process 102 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) [2024-06-21 21:01:48,774 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 (102)] Waiting until timeout for monitored process [2024-06-21 21:01:48,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:01:48,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:48,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:01:48,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:49,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:49,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:49,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614026543] [2024-06-21 21:01:49,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614026543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:49,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:49,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:01:49,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854043188] [2024-06-21 21:01:49,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:49,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:01:49,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:01:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:01:49,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:01:49,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 330 transitions, 3133 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:49,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:49,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:01:49,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:51,102 INFO L124 PetriNetUnfolderBase]: 3903/5952 cut-off events. [2024-06-21 21:01:51,102 INFO L125 PetriNetUnfolderBase]: For 1860517/1860539 co-relation queries the response was YES. [2024-06-21 21:01:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67924 conditions, 5952 events. 3903/5952 cut-off events. For 1860517/1860539 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31892 event pairs, 1017 based on Foata normal form. 9/5924 useless extension candidates. Maximal degree in co-relation 67788. Up to 5599 conditions per place. [2024-06-21 21:01:51,179 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 274 selfloop transitions, 13 changer transitions 0/340 dead transitions. [2024-06-21 21:01:51,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 340 transitions, 3731 flow [2024-06-21 21:01:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:01:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:01:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 21:01:51,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 21:01:51,180 INFO L175 Difference]: Start difference. First operand has 274 places, 330 transitions, 3133 flow. Second operand 6 states and 123 transitions. [2024-06-21 21:01:51,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 340 transitions, 3731 flow [2024-06-21 21:01:53,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 340 transitions, 3623 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:53,874 INFO L231 Difference]: Finished difference. Result has 276 places, 330 transitions, 3057 flow [2024-06-21 21:01:53,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3057, PETRI_PLACES=276, PETRI_TRANSITIONS=330} [2024-06-21 21:01:53,875 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-21 21:01:53,875 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 330 transitions, 3057 flow [2024-06-21 21:01:53,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:53,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:53,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:53,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:54,079 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:54,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 874617702, now seen corresponding path program 1 times [2024-06-21 21:01:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:54,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924045335] [2024-06-21 21:01:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:54,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:54,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:54,081 INFO L229 MonitoredProcess]: Starting monitored process 103 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) [2024-06-21 21:01:54,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2024-06-21 21:01:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:54,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 21:01:54,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:01:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:55,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:01:55,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:01:55,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924045335] [2024-06-21 21:01:55,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924045335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:55,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:55,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:01:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948336854] [2024-06-21 21:01:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:01:55,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:01:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:01:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:01:55,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:01:55,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 330 transitions, 3057 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:55,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:55,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:01:55,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:56,818 INFO L124 PetriNetUnfolderBase]: 4227/6315 cut-off events. [2024-06-21 21:01:56,818 INFO L125 PetriNetUnfolderBase]: For 1882247/1882247 co-relation queries the response was YES. [2024-06-21 21:01:56,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70568 conditions, 6315 events. 4227/6315 cut-off events. For 1882247/1882247 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32676 event pairs, 991 based on Foata normal form. 1/6314 useless extension candidates. Maximal degree in co-relation 70431. Up to 6120 conditions per place. [2024-06-21 21:01:56,905 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 321 selfloop transitions, 23 changer transitions 0/353 dead transitions. [2024-06-21 21:01:56,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 353 transitions, 4109 flow [2024-06-21 21:01:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:01:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:01:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 21:01:56,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-21 21:01:56,909 INFO L175 Difference]: Start difference. First operand has 276 places, 330 transitions, 3057 flow. Second operand 6 states and 128 transitions. [2024-06-21 21:01:56,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 353 transitions, 4109 flow [2024-06-21 21:01:59,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 353 transitions, 4075 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:59,220 INFO L231 Difference]: Finished difference. Result has 277 places, 336 transitions, 3201 flow [2024-06-21 21:01:59,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3201, PETRI_PLACES=277, PETRI_TRANSITIONS=336} [2024-06-21 21:01:59,220 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-21 21:01:59,220 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 336 transitions, 3201 flow [2024-06-21 21:01:59,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:59,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:59,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:59,223 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 (103)] Forceful destruction successful, exit code 0 [2024-06-21 21:01:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:59,424 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1166197938, now seen corresponding path program 2 times [2024-06-21 21:01:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:01:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228195443] [2024-06-21 21:01:59,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:01:59,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:01:59,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:01:59,426 INFO L229 MonitoredProcess]: Starting monitored process 104 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) [2024-06-21 21:01:59,456 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 (104)] Waiting until timeout for monitored process [2024-06-21 21:01:59,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:01:59,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:01:59,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 21:01:59,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:00,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:00,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:00,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228195443] [2024-06-21 21:02:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228195443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:00,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:02:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592160464] [2024-06-21 21:02:00,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:00,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:02:00,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:02:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:02:00,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:02:00,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 336 transitions, 3201 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:00,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:00,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:02:00,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:01,904 INFO L124 PetriNetUnfolderBase]: 4232/6322 cut-off events. [2024-06-21 21:02:01,904 INFO L125 PetriNetUnfolderBase]: For 1919770/1919770 co-relation queries the response was YES. [2024-06-21 21:02:01,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71404 conditions, 6322 events. 4232/6322 cut-off events. For 1919770/1919770 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 32753 event pairs, 991 based on Foata normal form. 1/6321 useless extension candidates. Maximal degree in co-relation 71266. Up to 6126 conditions per place. [2024-06-21 21:02:01,993 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 319 selfloop transitions, 25 changer transitions 0/353 dead transitions. [2024-06-21 21:02:01,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 353 transitions, 4193 flow [2024-06-21 21:02:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:02:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:02:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 21:02:01,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 21:02:01,995 INFO L175 Difference]: Start difference. First operand has 277 places, 336 transitions, 3201 flow. Second operand 6 states and 126 transitions. [2024-06-21 21:02:01,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 353 transitions, 4193 flow [2024-06-21 21:02:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 353 transitions, 4103 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 21:02:04,600 INFO L231 Difference]: Finished difference. Result has 281 places, 339 transitions, 3233 flow [2024-06-21 21:02:04,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3233, PETRI_PLACES=281, PETRI_TRANSITIONS=339} [2024-06-21 21:02:04,600 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-21 21:02:04,601 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 339 transitions, 3233 flow [2024-06-21 21:02:04,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:04,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:04,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:04,604 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 (104)] Forceful destruction successful, exit code 0 [2024-06-21 21:02:04,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:04,805 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:04,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:04,806 INFO L85 PathProgramCache]: Analyzing trace with hash 874797440, now seen corresponding path program 1 times [2024-06-21 21:02:04,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:04,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929670845] [2024-06-21 21:02:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:04,806 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 [2024-06-21 21:02:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:04,807 INFO L229 MonitoredProcess]: Starting monitored process 105 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) [2024-06-21 21:02:04,809 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 (105)] Waiting until timeout for monitored process [2024-06-21 21:02:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:04,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 21:02:04,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:06,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:06,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929670845] [2024-06-21 21:02:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929670845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:06,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:06,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:02:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379141113] [2024-06-21 21:02:06,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:06,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:02:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:02:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:02:06,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:02:06,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 339 transitions, 3233 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:06,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:06,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:02:06,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:07,235 INFO L124 PetriNetUnfolderBase]: 4212/6304 cut-off events. [2024-06-21 21:02:07,236 INFO L125 PetriNetUnfolderBase]: For 1946431/1946431 co-relation queries the response was YES. [2024-06-21 21:02:07,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71197 conditions, 6304 events. 4212/6304 cut-off events. For 1946431/1946431 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32709 event pairs, 1054 based on Foata normal form. 1/6303 useless extension candidates. Maximal degree in co-relation 71057. Up to 6004 conditions per place. [2024-06-21 21:02:07,326 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 294 selfloop transitions, 22 changer transitions 0/359 dead transitions. [2024-06-21 21:02:07,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 359 transitions, 4209 flow [2024-06-21 21:02:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:02:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:02:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 21:02:07,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 21:02:07,327 INFO L175 Difference]: Start difference. First operand has 281 places, 339 transitions, 3233 flow. Second operand 6 states and 126 transitions. [2024-06-21 21:02:07,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 359 transitions, 4209 flow [2024-06-21 21:02:10,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 359 transitions, 4131 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 21:02:10,081 INFO L231 Difference]: Finished difference. Result has 284 places, 345 transitions, 3315 flow [2024-06-21 21:02:10,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3315, PETRI_PLACES=284, PETRI_TRANSITIONS=345} [2024-06-21 21:02:10,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-21 21:02:10,081 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 345 transitions, 3315 flow [2024-06-21 21:02:10,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:10,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:10,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:10,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Ended with exit code 0 [2024-06-21 21:02:10,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:10,285 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:10,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1897023544, now seen corresponding path program 3 times [2024-06-21 21:02:10,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:10,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466210973] [2024-06-21 21:02:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:02:10,286 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 [2024-06-21 21:02:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:10,287 INFO L229 MonitoredProcess]: Starting monitored process 106 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) [2024-06-21 21:02:10,289 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 (106)] Waiting until timeout for monitored process [2024-06-21 21:02:10,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:02:10,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:02:10,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 21:02:10,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:11,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:11,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466210973] [2024-06-21 21:02:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466210973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:11,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:11,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:02:11,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746766671] [2024-06-21 21:02:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:11,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:02:11,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:02:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:02:11,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:02:11,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 345 transitions, 3315 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:11,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:11,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:02:11,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:12,694 INFO L124 PetriNetUnfolderBase]: 4246/6338 cut-off events. [2024-06-21 21:02:12,694 INFO L125 PetriNetUnfolderBase]: For 1987945/1987948 co-relation queries the response was YES. [2024-06-21 21:02:12,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72518 conditions, 6338 events. 4246/6338 cut-off events. For 1987945/1987948 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 32740 event pairs, 997 based on Foata normal form. 1/6336 useless extension candidates. Maximal degree in co-relation 72377. Up to 6140 conditions per place. [2024-06-21 21:02:12,786 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 319 selfloop transitions, 25 changer transitions 0/355 dead transitions. [2024-06-21 21:02:12,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 355 transitions, 4027 flow [2024-06-21 21:02:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:02:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:02:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 21:02:12,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 21:02:12,788 INFO L175 Difference]: Start difference. First operand has 284 places, 345 transitions, 3315 flow. Second operand 6 states and 122 transitions. [2024-06-21 21:02:12,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 355 transitions, 4027 flow [2024-06-21 21:02:15,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 355 transitions, 3935 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 21:02:15,937 INFO L231 Difference]: Finished difference. Result has 288 places, 345 transitions, 3279 flow [2024-06-21 21:02:15,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3279, PETRI_PLACES=288, PETRI_TRANSITIONS=345} [2024-06-21 21:02:15,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-21 21:02:15,938 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 345 transitions, 3279 flow [2024-06-21 21:02:15,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:15,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:15,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:15,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2024-06-21 21:02:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:16,142 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:16,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1402373546, now seen corresponding path program 2 times [2024-06-21 21:02:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:16,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476179720] [2024-06-21 21:02:16,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:02:16,143 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 [2024-06-21 21:02:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:16,144 INFO L229 MonitoredProcess]: Starting monitored process 107 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) [2024-06-21 21:02:16,146 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 (107)] Waiting until timeout for monitored process [2024-06-21 21:02:16,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:02:16,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:02:16,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 21:02:16,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:17,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:17,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:17,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476179720] [2024-06-21 21:02:17,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476179720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:17,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:17,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:02:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103105825] [2024-06-21 21:02:17,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:02:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:02:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:02:17,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:02:17,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 345 transitions, 3279 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:17,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:17,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:02:17,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:18,614 INFO L124 PetriNetUnfolderBase]: 4214/6308 cut-off events. [2024-06-21 21:02:18,615 INFO L125 PetriNetUnfolderBase]: For 2013911/2013914 co-relation queries the response was YES. [2024-06-21 21:02:18,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72152 conditions, 6308 events. 4214/6308 cut-off events. For 2013911/2013914 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 32758 event pairs, 1056 based on Foata normal form. 3/6308 useless extension candidates. Maximal degree in co-relation 72009. Up to 6007 conditions per place. [2024-06-21 21:02:18,712 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 291 selfloop transitions, 25 changer transitions 0/359 dead transitions. [2024-06-21 21:02:18,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 359 transitions, 4199 flow [2024-06-21 21:02:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:02:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:02:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 21:02:18,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 21:02:18,714 INFO L175 Difference]: Start difference. First operand has 288 places, 345 transitions, 3279 flow. Second operand 6 states and 123 transitions. [2024-06-21 21:02:18,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 359 transitions, 4199 flow [2024-06-21 21:02:21,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 359 transitions, 4113 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:02:21,319 INFO L231 Difference]: Finished difference. Result has 288 places, 348 transitions, 3301 flow [2024-06-21 21:02:21,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3301, PETRI_PLACES=288, PETRI_TRANSITIONS=348} [2024-06-21 21:02:21,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-21 21:02:21,319 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 348 transitions, 3301 flow [2024-06-21 21:02:21,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:21,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:21,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:21,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Ended with exit code 0 [2024-06-21 21:02:21,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:21,523 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:21,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash -321619950, now seen corresponding path program 3 times [2024-06-21 21:02:21,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:21,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749715807] [2024-06-21 21:02:21,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:02:21,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:21,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:21,525 INFO L229 MonitoredProcess]: Starting monitored process 108 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) [2024-06-21 21:02:21,544 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 (108)] Waiting until timeout for monitored process [2024-06-21 21:02:21,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:02:21,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:02:21,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-21 21:02:21,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:22,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:22,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749715807] [2024-06-21 21:02:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749715807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:22,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:22,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:02:22,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610100533] [2024-06-21 21:02:22,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:22,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:02:22,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:02:22,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:02:22,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:02:22,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 348 transitions, 3301 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:22,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:22,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:02:22,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:24,013 INFO L124 PetriNetUnfolderBase]: 4211/6304 cut-off events. [2024-06-21 21:02:24,013 INFO L125 PetriNetUnfolderBase]: For 2043975/2043978 co-relation queries the response was YES. [2024-06-21 21:02:24,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72331 conditions, 6304 events. 4211/6304 cut-off events. For 2043975/2043978 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32742 event pairs, 1056 based on Foata normal form. 3/6304 useless extension candidates. Maximal degree in co-relation 72187. Up to 6004 conditions per place. [2024-06-21 21:02:24,104 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 289 selfloop transitions, 26 changer transitions 0/358 dead transitions. [2024-06-21 21:02:24,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 358 transitions, 3955 flow [2024-06-21 21:02:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:02:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:02:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 21:02:24,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:02:24,105 INFO L175 Difference]: Start difference. First operand has 288 places, 348 transitions, 3301 flow. Second operand 6 states and 121 transitions. [2024-06-21 21:02:24,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 358 transitions, 3955 flow [2024-06-21 21:02:27,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 358 transitions, 3829 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 21:02:27,134 INFO L231 Difference]: Finished difference. Result has 290 places, 348 transitions, 3233 flow [2024-06-21 21:02:27,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3233, PETRI_PLACES=290, PETRI_TRANSITIONS=348} [2024-06-21 21:02:27,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-21 21:02:27,135 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 348 transitions, 3233 flow [2024-06-21 21:02:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:27,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:27,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:27,140 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 (108)] Forceful destruction successful, exit code 0 [2024-06-21 21:02:27,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:27,338 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:27,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1552919627, now seen corresponding path program 1 times [2024-06-21 21:02:27,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:27,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851774069] [2024-06-21 21:02:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:27,339 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 [2024-06-21 21:02:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:27,341 INFO L229 MonitoredProcess]: Starting monitored process 109 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) [2024-06-21 21:02:27,342 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 (109)] Waiting until timeout for monitored process [2024-06-21 21:02:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:27,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:02:27,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:28,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:28,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851774069] [2024-06-21 21:02:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851774069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:28,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:28,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058093872] [2024-06-21 21:02:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:28,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:29,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:02:29,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 348 transitions, 3233 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:29,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:29,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:02:29,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:30,529 INFO L124 PetriNetUnfolderBase]: 4026/6136 cut-off events. [2024-06-21 21:02:30,529 INFO L125 PetriNetUnfolderBase]: For 2216391/2216391 co-relation queries the response was YES. [2024-06-21 21:02:30,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75505 conditions, 6136 events. 4026/6136 cut-off events. For 2216391/2216391 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33676 event pairs, 750 based on Foata normal form. 8/6130 useless extension candidates. Maximal degree in co-relation 75360. Up to 5235 conditions per place. [2024-06-21 21:02:30,613 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 339 selfloop transitions, 59 changer transitions 0/412 dead transitions. [2024-06-21 21:02:30,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 412 transitions, 4819 flow [2024-06-21 21:02:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-21 21:02:30,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-21 21:02:30,614 INFO L175 Difference]: Start difference. First operand has 290 places, 348 transitions, 3233 flow. Second operand 11 states and 253 transitions. [2024-06-21 21:02:30,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 412 transitions, 4819 flow [2024-06-21 21:02:33,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 412 transitions, 4757 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:02:33,179 INFO L231 Difference]: Finished difference. Result has 297 places, 353 transitions, 3570 flow [2024-06-21 21:02:33,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3570, PETRI_PLACES=297, PETRI_TRANSITIONS=353} [2024-06-21 21:02:33,180 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-21 21:02:33,180 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 353 transitions, 3570 flow [2024-06-21 21:02:33,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:33,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:33,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:33,185 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 (109)] Forceful destruction successful, exit code 0 [2024-06-21 21:02:33,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:33,383 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:33,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1611012077, now seen corresponding path program 2 times [2024-06-21 21:02:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510644078] [2024-06-21 21:02:33,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:02:33,384 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 [2024-06-21 21:02:33,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:33,385 INFO L229 MonitoredProcess]: Starting monitored process 110 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) [2024-06-21 21:02:33,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2024-06-21 21:02:33,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:02:33,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:02:33,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:02:33,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:34,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:34,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:34,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510644078] [2024-06-21 21:02:34,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510644078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:34,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:34,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:34,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32941293] [2024-06-21 21:02:34,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:34,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:34,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:34,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:35,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:02:35,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 353 transitions, 3570 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:35,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:35,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:02:35,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:36,599 INFO L124 PetriNetUnfolderBase]: 4119/6301 cut-off events. [2024-06-21 21:02:36,599 INFO L125 PetriNetUnfolderBase]: For 2324989/2324989 co-relation queries the response was YES. [2024-06-21 21:02:36,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79398 conditions, 6301 events. 4119/6301 cut-off events. For 2324989/2324989 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 35060 event pairs, 892 based on Foata normal form. 8/6299 useless extension candidates. Maximal degree in co-relation 79251. Up to 5616 conditions per place. [2024-06-21 21:02:36,695 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 351 selfloop transitions, 52 changer transitions 0/417 dead transitions. [2024-06-21 21:02:36,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 417 transitions, 5187 flow [2024-06-21 21:02:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-21 21:02:36,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268595041322314 [2024-06-21 21:02:36,696 INFO L175 Difference]: Start difference. First operand has 297 places, 353 transitions, 3570 flow. Second operand 11 states and 255 transitions. [2024-06-21 21:02:36,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 417 transitions, 5187 flow [2024-06-21 21:02:39,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 417 transitions, 4885 flow, removed 124 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:39,799 INFO L231 Difference]: Finished difference. Result has 302 places, 358 transitions, 3652 flow [2024-06-21 21:02:39,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3652, PETRI_PLACES=302, PETRI_TRANSITIONS=358} [2024-06-21 21:02:39,800 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-21 21:02:39,800 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 358 transitions, 3652 flow [2024-06-21 21:02:39,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:39,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:39,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:39,803 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 (110)] Forceful destruction successful, exit code 0 [2024-06-21 21:02:40,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:40,004 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:40,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:40,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1849163753, now seen corresponding path program 3 times [2024-06-21 21:02:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:40,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696299363] [2024-06-21 21:02:40,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:02:40,005 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 [2024-06-21 21:02:40,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:40,007 INFO L229 MonitoredProcess]: Starting monitored process 111 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) [2024-06-21 21:02:40,008 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 (111)] Waiting until timeout for monitored process [2024-06-21 21:02:40,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:02:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:02:40,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:02:40,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:41,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:41,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696299363] [2024-06-21 21:02:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696299363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:41,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882269091] [2024-06-21 21:02:41,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:41,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:41,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:02:41,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 358 transitions, 3652 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:41,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:41,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:02:41,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:43,095 INFO L124 PetriNetUnfolderBase]: 4145/6353 cut-off events. [2024-06-21 21:02:43,095 INFO L125 PetriNetUnfolderBase]: For 2354883/2354883 co-relation queries the response was YES. [2024-06-21 21:02:43,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78608 conditions, 6353 events. 4145/6353 cut-off events. For 2354883/2354883 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35455 event pairs, 919 based on Foata normal form. 12/6355 useless extension candidates. Maximal degree in co-relation 78458. Up to 5795 conditions per place. [2024-06-21 21:02:43,195 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 353 selfloop transitions, 47 changer transitions 0/414 dead transitions. [2024-06-21 21:02:43,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 414 transitions, 4670 flow [2024-06-21 21:02:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-21 21:02:43,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512396694214876 [2024-06-21 21:02:43,197 INFO L175 Difference]: Start difference. First operand has 302 places, 358 transitions, 3652 flow. Second operand 11 states and 248 transitions. [2024-06-21 21:02:43,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 414 transitions, 4670 flow [2024-06-21 21:02:45,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 414 transitions, 4557 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:45,336 INFO L231 Difference]: Finished difference. Result has 306 places, 360 transitions, 3722 flow [2024-06-21 21:02:45,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3539, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3722, PETRI_PLACES=306, PETRI_TRANSITIONS=360} [2024-06-21 21:02:45,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-21 21:02:45,336 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 360 transitions, 3722 flow [2024-06-21 21:02:45,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:45,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:45,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:45,339 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 (111)] Forceful destruction successful, exit code 0 [2024-06-21 21:02:45,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:45,539 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:45,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:45,540 INFO L85 PathProgramCache]: Analyzing trace with hash 266097527, now seen corresponding path program 4 times [2024-06-21 21:02:45,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:45,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608820279] [2024-06-21 21:02:45,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:02:45,540 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 [2024-06-21 21:02:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:45,541 INFO L229 MonitoredProcess]: Starting monitored process 112 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) [2024-06-21 21:02:45,545 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 (112)] Waiting until timeout for monitored process [2024-06-21 21:02:45,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:02:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:02:45,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:02:45,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:46,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:46,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608820279] [2024-06-21 21:02:46,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608820279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:46,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:46,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:46,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119108872] [2024-06-21 21:02:46,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:46,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:46,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:47,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:02:47,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 360 transitions, 3722 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:47,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:47,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:02:47,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:48,697 INFO L124 PetriNetUnfolderBase]: 4129/6329 cut-off events. [2024-06-21 21:02:48,697 INFO L125 PetriNetUnfolderBase]: For 2331254/2331254 co-relation queries the response was YES. [2024-06-21 21:02:48,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77952 conditions, 6329 events. 4129/6329 cut-off events. For 2331254/2331254 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35305 event pairs, 901 based on Foata normal form. 8/6327 useless extension candidates. Maximal degree in co-relation 77800. Up to 5707 conditions per place. [2024-06-21 21:02:48,800 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 352 selfloop transitions, 50 changer transitions 0/416 dead transitions. [2024-06-21 21:02:48,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 416 transitions, 4674 flow [2024-06-21 21:02:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-21 21:02:48,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518595041322314 [2024-06-21 21:02:48,801 INFO L175 Difference]: Start difference. First operand has 306 places, 360 transitions, 3722 flow. Second operand 11 states and 251 transitions. [2024-06-21 21:02:48,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 416 transitions, 4674 flow [2024-06-21 21:02:50,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 416 transitions, 4451 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-21 21:02:51,000 INFO L231 Difference]: Finished difference. Result has 308 places, 360 transitions, 3606 flow [2024-06-21 21:02:51,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3606, PETRI_PLACES=308, PETRI_TRANSITIONS=360} [2024-06-21 21:02:51,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-21 21:02:51,000 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 360 transitions, 3606 flow [2024-06-21 21:02:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:51,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:51,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:51,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2024-06-21 21:02:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:51,204 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:51,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 89691615, now seen corresponding path program 1 times [2024-06-21 21:02:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389800257] [2024-06-21 21:02:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:51,205 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 [2024-06-21 21:02:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:51,206 INFO L229 MonitoredProcess]: Starting monitored process 113 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) [2024-06-21 21:02:51,207 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 (113)] Waiting until timeout for monitored process [2024-06-21 21:02:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:51,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:02:51,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:52,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:52,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:52,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389800257] [2024-06-21 21:02:52,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389800257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:52,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:52,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:02:52,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505977059] [2024-06-21 21:02:52,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:52,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:02:52,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:52,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:02:52,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:02:52,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:02:52,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 360 transitions, 3606 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:52,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:52,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:02:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:53,957 INFO L124 PetriNetUnfolderBase]: 4362/6637 cut-off events. [2024-06-21 21:02:53,957 INFO L125 PetriNetUnfolderBase]: For 2349616/2349616 co-relation queries the response was YES. [2024-06-21 21:02:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78476 conditions, 6637 events. 4362/6637 cut-off events. For 2349616/2349616 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 36000 event pairs, 1047 based on Foata normal form. 1/6629 useless extension candidates. Maximal degree in co-relation 78323. Up to 6147 conditions per place. [2024-06-21 21:02:54,063 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 320 selfloop transitions, 30 changer transitions 0/401 dead transitions. [2024-06-21 21:02:54,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 401 transitions, 4772 flow [2024-06-21 21:02:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 21:02:54,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-21 21:02:54,065 INFO L175 Difference]: Start difference. First operand has 308 places, 360 transitions, 3606 flow. Second operand 7 states and 162 transitions. [2024-06-21 21:02:54,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 401 transitions, 4772 flow [2024-06-21 21:02:56,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 401 transitions, 4655 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:02:56,459 INFO L231 Difference]: Finished difference. Result has 306 places, 371 transitions, 3740 flow [2024-06-21 21:02:56,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=306, PETRI_TRANSITIONS=371} [2024-06-21 21:02:56,460 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-21 21:02:56,460 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 371 transitions, 3740 flow [2024-06-21 21:02:56,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:56,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:56,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:56,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Ended with exit code 0 [2024-06-21 21:02:56,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:02:56,667 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:56,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:56,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1336950359, now seen corresponding path program 5 times [2024-06-21 21:02:56,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:02:56,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598565287] [2024-06-21 21:02:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:02:56,668 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 [2024-06-21 21:02:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:02:56,669 INFO L229 MonitoredProcess]: Starting monitored process 114 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) [2024-06-21 21:02:56,671 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 (114)] Waiting until timeout for monitored process [2024-06-21 21:02:56,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:02:56,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:02:56,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:02:56,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:02:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:58,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:02:58,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:02:58,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598565287] [2024-06-21 21:02:58,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598565287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:58,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:58,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:58,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346949884] [2024-06-21 21:02:58,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:02:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:58,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:02:58,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 371 transitions, 3740 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:58,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:58,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:02:58,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:00,092 INFO L124 PetriNetUnfolderBase]: 4167/6399 cut-off events. [2024-06-21 21:03:00,093 INFO L125 PetriNetUnfolderBase]: For 2430820/2430820 co-relation queries the response was YES. [2024-06-21 21:03:00,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78867 conditions, 6399 events. 4167/6399 cut-off events. For 2430820/2430820 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35933 event pairs, 857 based on Foata normal form. 12/6403 useless extension candidates. Maximal degree in co-relation 78712. Up to 5916 conditions per place. [2024-06-21 21:03:00,188 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 377 selfloop transitions, 30 changer transitions 0/421 dead transitions. [2024-06-21 21:03:00,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 4777 flow [2024-06-21 21:03:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 21:03:00,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-21 21:03:00,190 INFO L175 Difference]: Start difference. First operand has 306 places, 371 transitions, 3740 flow. Second operand 10 states and 223 transitions. [2024-06-21 21:03:00,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 4777 flow [2024-06-21 21:03:02,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 421 transitions, 4689 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-21 21:03:02,880 INFO L231 Difference]: Finished difference. Result has 315 places, 374 transitions, 3826 flow [2024-06-21 21:03:02,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3826, PETRI_PLACES=315, PETRI_TRANSITIONS=374} [2024-06-21 21:03:02,881 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-21 21:03:02,881 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 374 transitions, 3826 flow [2024-06-21 21:03:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:02,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:02,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:02,886 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 (114)] Forceful destruction successful, exit code 0 [2024-06-21 21:03:03,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:03,085 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:03,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1341423659, now seen corresponding path program 6 times [2024-06-21 21:03:03,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:03,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354599116] [2024-06-21 21:03:03,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:03:03,086 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 [2024-06-21 21:03:03,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:03,087 INFO L229 MonitoredProcess]: Starting monitored process 115 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) [2024-06-21 21:03:03,088 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 (115)] Waiting until timeout for monitored process [2024-06-21 21:03:03,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:03:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:03:03,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:03:03,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:04,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:04,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:04,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354599116] [2024-06-21 21:03:04,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354599116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:04,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:04,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617200391] [2024-06-21 21:03:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:04,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:04,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:04,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 374 transitions, 3826 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:04,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:04,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:04,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:06,252 INFO L124 PetriNetUnfolderBase]: 4276/6570 cut-off events. [2024-06-21 21:03:06,253 INFO L125 PetriNetUnfolderBase]: For 2527023/2527023 co-relation queries the response was YES. [2024-06-21 21:03:06,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82180 conditions, 6570 events. 4276/6570 cut-off events. For 2527023/2527023 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 37134 event pairs, 863 based on Foata normal form. 8/6570 useless extension candidates. Maximal degree in co-relation 82023. Up to 5965 conditions per place. [2024-06-21 21:03:06,359 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 376 selfloop transitions, 40 changer transitions 0/430 dead transitions. [2024-06-21 21:03:06,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 430 transitions, 5393 flow [2024-06-21 21:03:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 21:03:06,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-21 21:03:06,361 INFO L175 Difference]: Start difference. First operand has 315 places, 374 transitions, 3826 flow. Second operand 10 states and 230 transitions. [2024-06-21 21:03:06,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 430 transitions, 5393 flow [2024-06-21 21:03:09,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 430 transitions, 5254 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 21:03:09,046 INFO L231 Difference]: Finished difference. Result has 318 places, 379 transitions, 3971 flow [2024-06-21 21:03:09,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3971, PETRI_PLACES=318, PETRI_TRANSITIONS=379} [2024-06-21 21:03:09,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-21 21:03:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 379 transitions, 3971 flow [2024-06-21 21:03:09,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:09,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:09,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:09,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2024-06-21 21:03:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:09,250 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:09,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2084449237, now seen corresponding path program 7 times [2024-06-21 21:03:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:09,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121380881] [2024-06-21 21:03:09,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:03:09,251 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 [2024-06-21 21:03:09,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:09,252 INFO L229 MonitoredProcess]: Starting monitored process 116 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) [2024-06-21 21:03:09,254 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 (116)] Waiting until timeout for monitored process [2024-06-21 21:03:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:09,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:03:09,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:10,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:10,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:10,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121380881] [2024-06-21 21:03:10,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121380881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:10,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:10,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:10,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117636999] [2024-06-21 21:03:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:10,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:10,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:11,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:11,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 379 transitions, 3971 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:11,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:11,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:11,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:12,645 INFO L124 PetriNetUnfolderBase]: 4302/6622 cut-off events. [2024-06-21 21:03:12,646 INFO L125 PetriNetUnfolderBase]: For 2569326/2569326 co-relation queries the response was YES. [2024-06-21 21:03:12,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82229 conditions, 6622 events. 4302/6622 cut-off events. For 2569326/2569326 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 37649 event pairs, 895 based on Foata normal form. 12/6626 useless extension candidates. Maximal degree in co-relation 82070. Up to 6156 conditions per place. [2024-06-21 21:03:12,762 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 388 selfloop transitions, 25 changer transitions 0/427 dead transitions. [2024-06-21 21:03:12,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 427 transitions, 4999 flow [2024-06-21 21:03:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 21:03:12,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:03:12,764 INFO L175 Difference]: Start difference. First operand has 318 places, 379 transitions, 3971 flow. Second operand 10 states and 220 transitions. [2024-06-21 21:03:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 427 transitions, 4999 flow [2024-06-21 21:03:15,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 427 transitions, 4883 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 21:03:15,650 INFO L231 Difference]: Finished difference. Result has 322 places, 381 transitions, 4000 flow [2024-06-21 21:03:15,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3855, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4000, PETRI_PLACES=322, PETRI_TRANSITIONS=381} [2024-06-21 21:03:15,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-21 21:03:15,651 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 381 transitions, 4000 flow [2024-06-21 21:03:15,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:15,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:15,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:15,656 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 (116)] Forceful destruction successful, exit code 0 [2024-06-21 21:03:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:15,854 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:15,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1810254325, now seen corresponding path program 8 times [2024-06-21 21:03:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934632398] [2024-06-21 21:03:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:03:15,855 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 [2024-06-21 21:03:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:15,856 INFO L229 MonitoredProcess]: Starting monitored process 117 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) [2024-06-21 21:03:15,857 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 (117)] Waiting until timeout for monitored process [2024-06-21 21:03:15,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:03:15,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:03:15,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:03:15,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:17,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:17,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934632398] [2024-06-21 21:03:17,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934632398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:17,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:17,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:17,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647553758] [2024-06-21 21:03:17,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:17,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:17,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:17,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:17,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 381 transitions, 4000 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:17,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:17,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:17,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:19,048 INFO L124 PetriNetUnfolderBase]: 4278/6586 cut-off events. [2024-06-21 21:03:19,049 INFO L125 PetriNetUnfolderBase]: For 2541158/2541158 co-relation queries the response was YES. [2024-06-21 21:03:19,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80786 conditions, 6586 events. 4278/6586 cut-off events. For 2541158/2541158 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 37362 event pairs, 875 based on Foata normal form. 12/6590 useless extension candidates. Maximal degree in co-relation 80625. Up to 6057 conditions per place. [2024-06-21 21:03:19,157 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 377 selfloop transitions, 37 changer transitions 0/428 dead transitions. [2024-06-21 21:03:19,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 428 transitions, 4952 flow [2024-06-21 21:03:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 21:03:19,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-21 21:03:19,159 INFO L175 Difference]: Start difference. First operand has 322 places, 381 transitions, 4000 flow. Second operand 10 states and 225 transitions. [2024-06-21 21:03:19,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 428 transitions, 4952 flow [2024-06-21 21:03:22,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 428 transitions, 4711 flow, removed 88 selfloop flow, removed 10 redundant places. [2024-06-21 21:03:22,389 INFO L231 Difference]: Finished difference. Result has 322 places, 381 transitions, 3842 flow [2024-06-21 21:03:22,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3842, PETRI_PLACES=322, PETRI_TRANSITIONS=381} [2024-06-21 21:03:22,390 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-21 21:03:22,390 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 381 transitions, 3842 flow [2024-06-21 21:03:22,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:22,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:22,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:22,394 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 (117)] Forceful destruction successful, exit code 0 [2024-06-21 21:03:22,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:22,594 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:22,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:22,595 INFO L85 PathProgramCache]: Analyzing trace with hash 8074861, now seen corresponding path program 9 times [2024-06-21 21:03:22,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:22,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739639089] [2024-06-21 21:03:22,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:03:22,595 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 [2024-06-21 21:03:22,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:22,596 INFO L229 MonitoredProcess]: Starting monitored process 118 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) [2024-06-21 21:03:22,621 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 (118)] Waiting until timeout for monitored process [2024-06-21 21:03:22,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:03:22,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:03:22,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:03:22,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:24,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:24,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:24,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739639089] [2024-06-21 21:03:24,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739639089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:24,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:24,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841378586] [2024-06-21 21:03:24,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:24,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:24,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:24,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:24,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:24,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 381 transitions, 3842 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:24,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:24,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:24,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:25,846 INFO L124 PetriNetUnfolderBase]: 4312/6650 cut-off events. [2024-06-21 21:03:25,846 INFO L125 PetriNetUnfolderBase]: For 2553508/2553508 co-relation queries the response was YES. [2024-06-21 21:03:25,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80663 conditions, 6650 events. 4312/6650 cut-off events. For 2553508/2553508 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37975 event pairs, 875 based on Foata normal form. 8/6650 useless extension candidates. Maximal degree in co-relation 80503. Up to 6019 conditions per place. [2024-06-21 21:03:25,947 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 381 selfloop transitions, 36 changer transitions 0/431 dead transitions. [2024-06-21 21:03:25,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 431 transitions, 4888 flow [2024-06-21 21:03:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-21 21:03:25,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-21 21:03:25,948 INFO L175 Difference]: Start difference. First operand has 322 places, 381 transitions, 3842 flow. Second operand 10 states and 224 transitions. [2024-06-21 21:03:25,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 431 transitions, 4888 flow [2024-06-21 21:03:28,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 431 transitions, 4809 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:28,708 INFO L231 Difference]: Finished difference. Result has 323 places, 383 transitions, 3932 flow [2024-06-21 21:03:28,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3932, PETRI_PLACES=323, PETRI_TRANSITIONS=383} [2024-06-21 21:03:28,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-21 21:03:28,708 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 383 transitions, 3932 flow [2024-06-21 21:03:28,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:28,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:28,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:28,714 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 (118)] Forceful destruction successful, exit code 0 [2024-06-21 21:03:28,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:28,912 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:28,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1341538979, now seen corresponding path program 10 times [2024-06-21 21:03:28,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:28,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980663995] [2024-06-21 21:03:28,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:03:28,913 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 [2024-06-21 21:03:28,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:28,914 INFO L229 MonitoredProcess]: Starting monitored process 119 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) [2024-06-21 21:03:28,930 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 (119)] Waiting until timeout for monitored process [2024-06-21 21:03:28,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:03:28,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:03:28,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:03:28,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:30,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:30,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980663995] [2024-06-21 21:03:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980663995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:30,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:30,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:30,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110589470] [2024-06-21 21:03:30,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:30,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:30,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 383 transitions, 3932 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:30,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:30,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:30,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:32,151 INFO L124 PetriNetUnfolderBase]: 4296/6626 cut-off events. [2024-06-21 21:03:32,152 INFO L125 PetriNetUnfolderBase]: For 2549386/2549386 co-relation queries the response was YES. [2024-06-21 21:03:32,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79987 conditions, 6626 events. 4296/6626 cut-off events. For 2549386/2549386 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37786 event pairs, 852 based on Foata normal form. 8/6626 useless extension candidates. Maximal degree in co-relation 79826. Up to 5744 conditions per place. [2024-06-21 21:03:32,266 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 365 selfloop transitions, 53 changer transitions 0/432 dead transitions. [2024-06-21 21:03:32,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 432 transitions, 4896 flow [2024-06-21 21:03:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 21:03:32,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-21 21:03:32,268 INFO L175 Difference]: Start difference. First operand has 323 places, 383 transitions, 3932 flow. Second operand 10 states and 227 transitions. [2024-06-21 21:03:32,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 432 transitions, 4896 flow [2024-06-21 21:03:35,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 432 transitions, 4697 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-21 21:03:35,874 INFO L231 Difference]: Finished difference. Result has 325 places, 383 transitions, 3846 flow [2024-06-21 21:03:35,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3846, PETRI_PLACES=325, PETRI_TRANSITIONS=383} [2024-06-21 21:03:35,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-21 21:03:35,874 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 383 transitions, 3846 flow [2024-06-21 21:03:35,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:35,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:35,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:35,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2024-06-21 21:03:36,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:36,075 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:36,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -494751101, now seen corresponding path program 2 times [2024-06-21 21:03:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:36,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975545576] [2024-06-21 21:03:36,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:03:36,076 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 [2024-06-21 21:03:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:36,077 INFO L229 MonitoredProcess]: Starting monitored process 120 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) [2024-06-21 21:03:36,078 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 (120)] Waiting until timeout for monitored process [2024-06-21 21:03:36,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:03:36,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:03:36,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:03:36,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:37,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:37,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:37,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975545576] [2024-06-21 21:03:37,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975545576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:37,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:37,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:03:37,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347900592] [2024-06-21 21:03:37,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:03:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:37,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:03:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:03:37,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:37,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 383 transitions, 3846 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:37,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:37,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:37,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:38,837 INFO L124 PetriNetUnfolderBase]: 4600/7023 cut-off events. [2024-06-21 21:03:38,837 INFO L125 PetriNetUnfolderBase]: For 2545754/2545754 co-relation queries the response was YES. [2024-06-21 21:03:38,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80798 conditions, 7023 events. 4600/7023 cut-off events. For 2545754/2545754 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 38877 event pairs, 1101 based on Foata normal form. 1/7001 useless extension candidates. Maximal degree in co-relation 80636. Up to 6553 conditions per place. [2024-06-21 21:03:38,952 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 333 selfloop transitions, 28 changer transitions 0/412 dead transitions. [2024-06-21 21:03:38,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 412 transitions, 4703 flow [2024-06-21 21:03:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 21:03:38,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:03:38,954 INFO L175 Difference]: Start difference. First operand has 325 places, 383 transitions, 3846 flow. Second operand 7 states and 154 transitions. [2024-06-21 21:03:38,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 412 transitions, 4703 flow [2024-06-21 21:03:43,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 412 transitions, 4460 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 21:03:43,230 INFO L231 Difference]: Finished difference. Result has 321 places, 389 transitions, 3748 flow [2024-06-21 21:03:43,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3748, PETRI_PLACES=321, PETRI_TRANSITIONS=389} [2024-06-21 21:03:43,230 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-21 21:03:43,230 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 389 transitions, 3748 flow [2024-06-21 21:03:43,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:43,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:43,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:43,236 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 (120)] Forceful destruction successful, exit code 0 [2024-06-21 21:03:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:43,434 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:43,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -501990903, now seen corresponding path program 1 times [2024-06-21 21:03:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:43,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779658882] [2024-06-21 21:03:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:43,435 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 [2024-06-21 21:03:43,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:43,437 INFO L229 MonitoredProcess]: Starting monitored process 121 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) [2024-06-21 21:03:43,437 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 (121)] Waiting until timeout for monitored process [2024-06-21 21:03:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:43,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:03:43,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:44,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:44,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779658882] [2024-06-21 21:03:44,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779658882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:44,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:44,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:03:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656054473] [2024-06-21 21:03:44,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:44,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:03:44,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:03:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:03:44,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:44,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 389 transitions, 3748 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:44,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:44,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:44,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:46,167 INFO L124 PetriNetUnfolderBase]: 4613/7042 cut-off events. [2024-06-21 21:03:46,167 INFO L125 PetriNetUnfolderBase]: For 2591843/2591846 co-relation queries the response was YES. [2024-06-21 21:03:46,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80442 conditions, 7042 events. 4613/7042 cut-off events. For 2591843/2591846 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 39084 event pairs, 1106 based on Foata normal form. 3/7021 useless extension candidates. Maximal degree in co-relation 80281. Up to 6548 conditions per place. [2024-06-21 21:03:46,271 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 335 selfloop transitions, 33 changer transitions 0/419 dead transitions. [2024-06-21 21:03:46,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 419 transitions, 5162 flow [2024-06-21 21:03:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:03:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:03:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 21:03:46,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265151515151515 [2024-06-21 21:03:46,273 INFO L175 Difference]: Start difference. First operand has 321 places, 389 transitions, 3748 flow. Second operand 6 states and 139 transitions. [2024-06-21 21:03:46,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 419 transitions, 5162 flow [2024-06-21 21:03:50,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 419 transitions, 5072 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:03:50,340 INFO L231 Difference]: Finished difference. Result has 323 places, 398 transitions, 3886 flow [2024-06-21 21:03:50,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3886, PETRI_PLACES=323, PETRI_TRANSITIONS=398} [2024-06-21 21:03:50,341 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-21 21:03:50,341 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 398 transitions, 3886 flow [2024-06-21 21:03:50,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:50,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:50,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:50,346 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 (121)] Forceful destruction successful, exit code 0 [2024-06-21 21:03:50,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:50,544 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:50,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1608029537, now seen corresponding path program 2 times [2024-06-21 21:03:50,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:50,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785138494] [2024-06-21 21:03:50,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:03:50,545 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 [2024-06-21 21:03:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:50,546 INFO L229 MonitoredProcess]: Starting monitored process 122 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) [2024-06-21 21:03:50,547 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 (122)] Waiting until timeout for monitored process [2024-06-21 21:03:50,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:03:50,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:03:50,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:03:50,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:51,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:51,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:51,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785138494] [2024-06-21 21:03:51,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785138494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:51,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:51,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:03:51,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95388639] [2024-06-21 21:03:51,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:51,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:03:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:03:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:03:51,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:03:51,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 398 transitions, 3886 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:51,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:51,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:03:51,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:53,326 INFO L124 PetriNetUnfolderBase]: 4626/7060 cut-off events. [2024-06-21 21:03:53,326 INFO L125 PetriNetUnfolderBase]: For 2642610/2642613 co-relation queries the response was YES. [2024-06-21 21:03:53,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81459 conditions, 7060 events. 4626/7060 cut-off events. For 2642610/2642613 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 39154 event pairs, 1106 based on Foata normal form. 3/7039 useless extension candidates. Maximal degree in co-relation 81297. Up to 6563 conditions per place. [2024-06-21 21:03:53,443 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 332 selfloop transitions, 40 changer transitions 0/423 dead transitions. [2024-06-21 21:03:53,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 423 transitions, 5279 flow [2024-06-21 21:03:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:03:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:03:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-21 21:03:53,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-06-21 21:03:53,444 INFO L175 Difference]: Start difference. First operand has 323 places, 398 transitions, 3886 flow. Second operand 6 states and 136 transitions. [2024-06-21 21:03:53,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 423 transitions, 5279 flow [2024-06-21 21:03:58,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 423 transitions, 5165 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-21 21:03:58,046 INFO L231 Difference]: Finished difference. Result has 328 places, 405 transitions, 3983 flow [2024-06-21 21:03:58,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3983, PETRI_PLACES=328, PETRI_TRANSITIONS=405} [2024-06-21 21:03:58,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-21 21:03:58,047 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 405 transitions, 3983 flow [2024-06-21 21:03:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:58,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:58,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:58,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Ended with exit code 0 [2024-06-21 21:03:58,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:03:58,250 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:58,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:58,250 INFO L85 PathProgramCache]: Analyzing trace with hash -693346681, now seen corresponding path program 1 times [2024-06-21 21:03:58,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:03:58,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336474960] [2024-06-21 21:03:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:58,251 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 [2024-06-21 21:03:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:03:58,259 INFO L229 MonitoredProcess]: Starting monitored process 123 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) [2024-06-21 21:03:58,260 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 (123)] Waiting until timeout for monitored process [2024-06-21 21:03:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:58,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:03:58,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:03:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:59,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:03:59,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:03:59,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336474960] [2024-06-21 21:03:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336474960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:59,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:59,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:59,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490783574] [2024-06-21 21:03:59,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:59,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:59,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:03:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:59,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:03:59,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 405 transitions, 3983 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:59,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:59,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:03:59,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:01,198 INFO L124 PetriNetUnfolderBase]: 4897/7356 cut-off events. [2024-06-21 21:04:01,198 INFO L125 PetriNetUnfolderBase]: For 2714010/2714013 co-relation queries the response was YES. [2024-06-21 21:04:01,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83862 conditions, 7356 events. 4897/7356 cut-off events. For 2714010/2714013 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 39820 event pairs, 1006 based on Foata normal form. 4/7357 useless extension candidates. Maximal degree in co-relation 83698. Up to 6955 conditions per place. [2024-06-21 21:04:01,322 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 389 selfloop transitions, 47 changer transitions 0/448 dead transitions. [2024-06-21 21:04:01,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 448 transitions, 5069 flow [2024-06-21 21:04:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 21:04:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-21 21:04:01,324 INFO L175 Difference]: Start difference. First operand has 328 places, 405 transitions, 3983 flow. Second operand 9 states and 195 transitions. [2024-06-21 21:04:01,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 448 transitions, 5069 flow [2024-06-21 21:04:05,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 448 transitions, 4980 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 21:04:05,951 INFO L231 Difference]: Finished difference. Result has 336 places, 410 transitions, 4119 flow [2024-06-21 21:04:05,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4119, PETRI_PLACES=336, PETRI_TRANSITIONS=410} [2024-06-21 21:04:05,952 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-21 21:04:05,952 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 410 transitions, 4119 flow [2024-06-21 21:04:05,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:05,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:05,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:05,957 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 (123)] Forceful destruction successful, exit code 0 [2024-06-21 21:04:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:06,155 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:06,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1633717451, now seen corresponding path program 11 times [2024-06-21 21:04:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:04:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032172793] [2024-06-21 21:04:06,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:04:06,157 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 [2024-06-21 21:04:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:04:06,158 INFO L229 MonitoredProcess]: Starting monitored process 124 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) [2024-06-21 21:04:06,159 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 (124)] Waiting until timeout for monitored process [2024-06-21 21:04:06,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:04:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:04:06,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:04:06,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:04:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:07,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:04:07,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:04:07,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032172793] [2024-06-21 21:04:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032172793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:07,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884582777] [2024-06-21 21:04:07,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:07,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:04:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:07,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:04:07,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 410 transitions, 4119 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:07,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:07,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:04:07,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:09,506 INFO L124 PetriNetUnfolderBase]: 4419/6828 cut-off events. [2024-06-21 21:04:09,506 INFO L125 PetriNetUnfolderBase]: For 2845935/2845938 co-relation queries the response was YES. [2024-06-21 21:04:09,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83475 conditions, 6828 events. 4419/6828 cut-off events. For 2845935/2845938 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 39224 event pairs, 786 based on Foata normal form. 16/6836 useless extension candidates. Maximal degree in co-relation 83309. Up to 5849 conditions per place. [2024-06-21 21:04:09,626 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 342 selfloop transitions, 103 changer transitions 0/460 dead transitions. [2024-06-21 21:04:09,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 460 transitions, 5729 flow [2024-06-21 21:04:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-21 21:04:09,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-21 21:04:09,627 INFO L175 Difference]: Start difference. First operand has 336 places, 410 transitions, 4119 flow. Second operand 10 states and 232 transitions. [2024-06-21 21:04:09,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 460 transitions, 5729 flow [2024-06-21 21:04:14,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 460 transitions, 5546 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:14,680 INFO L231 Difference]: Finished difference. Result has 340 places, 413 transitions, 4305 flow [2024-06-21 21:04:14,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4305, PETRI_PLACES=340, PETRI_TRANSITIONS=413} [2024-06-21 21:04:14,681 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-21 21:04:14,681 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 413 transitions, 4305 flow [2024-06-21 21:04:14,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:14,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:14,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:14,686 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 (124)] Forceful destruction successful, exit code 0 [2024-06-21 21:04:14,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:14,884 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:14,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2044878925, now seen corresponding path program 12 times [2024-06-21 21:04:14,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:04:14,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89515247] [2024-06-21 21:04:14,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:04:14,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:14,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:04:14,887 INFO L229 MonitoredProcess]: Starting monitored process 125 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) [2024-06-21 21:04:14,888 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 (125)] Waiting until timeout for monitored process [2024-06-21 21:04:14,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:04:14,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:04:14,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:04:14,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:04:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:16,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:04:16,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:04:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89515247] [2024-06-21 21:04:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89515247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:16,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:16,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:16,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076668939] [2024-06-21 21:04:16,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:16,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:04:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:16,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:04:16,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 413 transitions, 4305 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:16,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:16,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:04:16,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:18,100 INFO L124 PetriNetUnfolderBase]: 4470/6909 cut-off events. [2024-06-21 21:04:18,100 INFO L125 PetriNetUnfolderBase]: For 2882967/2882970 co-relation queries the response was YES. [2024-06-21 21:04:18,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85320 conditions, 6909 events. 4470/6909 cut-off events. For 2882967/2882970 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 39815 event pairs, 802 based on Foata normal form. 12/6913 useless extension candidates. Maximal degree in co-relation 85153. Up to 5957 conditions per place. [2024-06-21 21:04:18,214 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 348 selfloop transitions, 101 changer transitions 0/464 dead transitions. [2024-06-21 21:04:18,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 464 transitions, 5937 flow [2024-06-21 21:04:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-21 21:04:18,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-06-21 21:04:18,215 INFO L175 Difference]: Start difference. First operand has 340 places, 413 transitions, 4305 flow. Second operand 10 states and 234 transitions. [2024-06-21 21:04:18,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 464 transitions, 5937 flow [2024-06-21 21:04:22,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 464 transitions, 5594 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:22,492 INFO L231 Difference]: Finished difference. Result has 342 places, 416 transitions, 4333 flow [2024-06-21 21:04:22,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4333, PETRI_PLACES=342, PETRI_TRANSITIONS=416} [2024-06-21 21:04:22,492 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-21 21:04:22,492 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 416 transitions, 4333 flow [2024-06-21 21:04:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:22,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:22,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:22,496 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 (125)] Forceful destruction successful, exit code 0 [2024-06-21 21:04:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:22,696 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:22,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2045051905, now seen corresponding path program 13 times [2024-06-21 21:04:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:04:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640623836] [2024-06-21 21:04:22,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:04:22,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:04:22,698 INFO L229 MonitoredProcess]: Starting monitored process 126 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) [2024-06-21 21:04:22,699 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 (126)] Waiting until timeout for monitored process [2024-06-21 21:04:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:22,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:04:22,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:04:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:24,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:04:24,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:04:24,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640623836] [2024-06-21 21:04:24,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640623836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:24,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:24,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281896968] [2024-06-21 21:04:24,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:24,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:04:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:24,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:04:24,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 416 transitions, 4333 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:24,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:24,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:04:24,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:25,935 INFO L124 PetriNetUnfolderBase]: 4496/6961 cut-off events. [2024-06-21 21:04:25,935 INFO L125 PetriNetUnfolderBase]: For 2905962/2905965 co-relation queries the response was YES. [2024-06-21 21:04:26,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85345 conditions, 6961 events. 4496/6961 cut-off events. For 2905962/2905965 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40303 event pairs, 805 based on Foata normal form. 12/6970 useless extension candidates. Maximal degree in co-relation 85177. Up to 5940 conditions per place. [2024-06-21 21:04:26,057 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 343 selfloop transitions, 109 changer transitions 0/467 dead transitions. [2024-06-21 21:04:26,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 467 transitions, 5981 flow [2024-06-21 21:04:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-21 21:04:26,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-06-21 21:04:26,059 INFO L175 Difference]: Start difference. First operand has 342 places, 416 transitions, 4333 flow. Second operand 10 states and 235 transitions. [2024-06-21 21:04:26,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 467 transitions, 5981 flow [2024-06-21 21:04:30,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 467 transitions, 5636 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:30,226 INFO L231 Difference]: Finished difference. Result has 344 places, 419 transitions, 4381 flow [2024-06-21 21:04:30,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4381, PETRI_PLACES=344, PETRI_TRANSITIONS=419} [2024-06-21 21:04:30,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-21 21:04:30,227 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 419 transitions, 4381 flow [2024-06-21 21:04:30,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:30,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:30,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:30,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Ended with exit code 0 [2024-06-21 21:04:30,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:30,430 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:30,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2045056555, now seen corresponding path program 14 times [2024-06-21 21:04:30,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:04:30,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022040385] [2024-06-21 21:04:30,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:04:30,431 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 [2024-06-21 21:04:30,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:04:30,432 INFO L229 MonitoredProcess]: Starting monitored process 127 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) [2024-06-21 21:04:30,444 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 (127)] Waiting until timeout for monitored process [2024-06-21 21:04:30,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:04:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:04:30,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:04:30,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:04:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:31,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:04:31,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:04:31,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022040385] [2024-06-21 21:04:31,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022040385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:31,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:31,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309117223] [2024-06-21 21:04:31,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:31,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:04:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:31,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:04:31,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 419 transitions, 4381 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:31,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:31,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:04:31,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:33,595 INFO L124 PetriNetUnfolderBase]: 4530/7025 cut-off events. [2024-06-21 21:04:33,595 INFO L125 PetriNetUnfolderBase]: For 2924403/2924406 co-relation queries the response was YES. [2024-06-21 21:04:33,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85964 conditions, 7025 events. 4530/7025 cut-off events. For 2924403/2924406 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 40821 event pairs, 798 based on Foata normal form. 8/7030 useless extension candidates. Maximal degree in co-relation 85795. Up to 5784 conditions per place. [2024-06-21 21:04:33,724 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 337 selfloop transitions, 118 changer transitions 0/470 dead transitions. [2024-06-21 21:04:33,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 470 transitions, 6003 flow [2024-06-21 21:04:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-21 21:04:33,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-21 21:04:33,726 INFO L175 Difference]: Start difference. First operand has 344 places, 419 transitions, 4381 flow. Second operand 10 states and 236 transitions. [2024-06-21 21:04:33,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 470 transitions, 6003 flow [2024-06-21 21:04:39,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 470 transitions, 5636 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:39,685 INFO L231 Difference]: Finished difference. Result has 346 places, 421 transitions, 4383 flow [2024-06-21 21:04:39,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4383, PETRI_PLACES=346, PETRI_TRANSITIONS=421} [2024-06-21 21:04:39,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-21 21:04:39,685 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 421 transitions, 4383 flow [2024-06-21 21:04:39,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:39,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:39,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:39,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2024-06-21 21:04:39,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:39,889 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:39,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:39,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2079092991, now seen corresponding path program 15 times [2024-06-21 21:04:39,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:04:39,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64404297] [2024-06-21 21:04:39,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:04:39,890 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 [2024-06-21 21:04:39,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:04:39,893 INFO L229 MonitoredProcess]: Starting monitored process 128 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) [2024-06-21 21:04:39,893 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 (128)] Waiting until timeout for monitored process [2024-06-21 21:04:39,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:04:39,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:04:39,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:04:39,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:04:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:41,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:04:41,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:04:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64404297] [2024-06-21 21:04:41,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64404297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:41,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244173939] [2024-06-21 21:04:41,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:41,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:04:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:41,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:04:41,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 421 transitions, 4383 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:41,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:41,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:04:41,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:43,199 INFO L124 PetriNetUnfolderBase]: 4664/7245 cut-off events. [2024-06-21 21:04:43,200 INFO L125 PetriNetUnfolderBase]: For 3096732/3096735 co-relation queries the response was YES. [2024-06-21 21:04:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90255 conditions, 7245 events. 4664/7245 cut-off events. For 3096732/3096735 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42613 event pairs, 811 based on Foata normal form. 8/7245 useless extension candidates. Maximal degree in co-relation 90085. Up to 5649 conditions per place. [2024-06-21 21:04:43,332 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 322 selfloop transitions, 141 changer transitions 0/478 dead transitions. [2024-06-21 21:04:43,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 478 transitions, 6669 flow [2024-06-21 21:04:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 21:04:43,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-21 21:04:43,333 INFO L175 Difference]: Start difference. First operand has 346 places, 421 transitions, 4383 flow. Second operand 10 states and 241 transitions. [2024-06-21 21:04:43,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 478 transitions, 6669 flow [2024-06-21 21:04:47,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 478 transitions, 6318 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:47,652 INFO L231 Difference]: Finished difference. Result has 349 places, 426 transitions, 4658 flow [2024-06-21 21:04:47,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4658, PETRI_PLACES=349, PETRI_TRANSITIONS=426} [2024-06-21 21:04:47,652 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-21 21:04:47,652 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 426 transitions, 4658 flow [2024-06-21 21:04:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:47,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:47,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:47,657 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 (128)] Forceful destruction successful, exit code 0 [2024-06-21 21:04:47,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:47,856 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:47,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2079208311, now seen corresponding path program 16 times [2024-06-21 21:04:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:04:47,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592963713] [2024-06-21 21:04:47,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:04:47,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:04:47,858 INFO L229 MonitoredProcess]: Starting monitored process 129 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) [2024-06-21 21:04:47,860 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 (129)] Waiting until timeout for monitored process [2024-06-21 21:04:47,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:04:47,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:04:47,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:04:47,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:04:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:49,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:04:49,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:04:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592963713] [2024-06-21 21:04:49,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592963713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:49,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581974503] [2024-06-21 21:04:49,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:04:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:49,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:04:49,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 426 transitions, 4658 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:49,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:49,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:04:49,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:51,380 INFO L124 PetriNetUnfolderBase]: 4773/7416 cut-off events. [2024-06-21 21:04:51,380 INFO L125 PetriNetUnfolderBase]: For 3253872/3253875 co-relation queries the response was YES. [2024-06-21 21:04:51,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94612 conditions, 7416 events. 4773/7416 cut-off events. For 3253872/3253875 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43878 event pairs, 839 based on Foata normal form. 8/7421 useless extension candidates. Maximal degree in co-relation 94440. Up to 6203 conditions per place. [2024-06-21 21:04:51,500 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 342 selfloop transitions, 126 changer transitions 0/483 dead transitions. [2024-06-21 21:04:51,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 483 transitions, 6979 flow [2024-06-21 21:04:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-21 21:04:51,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 21:04:51,502 INFO L175 Difference]: Start difference. First operand has 349 places, 426 transitions, 4658 flow. Second operand 10 states and 242 transitions. [2024-06-21 21:04:51,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 483 transitions, 6979 flow [2024-06-21 21:04:55,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 483 transitions, 6544 flow, removed 148 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:55,911 INFO L231 Difference]: Finished difference. Result has 354 places, 431 transitions, 4807 flow [2024-06-21 21:04:55,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4333, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4807, PETRI_PLACES=354, PETRI_TRANSITIONS=431} [2024-06-21 21:04:55,912 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-21 21:04:55,912 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 431 transitions, 4807 flow [2024-06-21 21:04:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:55,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:55,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:55,920 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 (129)] Forceful destruction successful, exit code 0 [2024-06-21 21:04:56,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:04:56,115 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:56,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2083854591, now seen corresponding path program 17 times [2024-06-21 21:04:56,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:04:56,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818541089] [2024-06-21 21:04:56,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:04:56,116 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 [2024-06-21 21:04:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:04:56,117 INFO L229 MonitoredProcess]: Starting monitored process 130 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) [2024-06-21 21:04:56,147 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 (130)] Waiting until timeout for monitored process [2024-06-21 21:04:56,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:04:56,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:04:56,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:04:56,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:04:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:57,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:04:57,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:04:57,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818541089] [2024-06-21 21:04:57,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818541089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:57,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:57,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:57,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428956895] [2024-06-21 21:04:57,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:57,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:57,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:04:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:57,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:04:57,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 431 transitions, 4807 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:57,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:57,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:04:57,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:59,553 INFO L124 PetriNetUnfolderBase]: 4824/7497 cut-off events. [2024-06-21 21:04:59,553 INFO L125 PetriNetUnfolderBase]: For 3300502/3300505 co-relation queries the response was YES. [2024-06-21 21:04:59,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94764 conditions, 7497 events. 4824/7497 cut-off events. For 3300502/3300505 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 44568 event pairs, 878 based on Foata normal form. 12/7506 useless extension candidates. Maximal degree in co-relation 94589. Up to 6515 conditions per place. [2024-06-21 21:04:59,690 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 367 selfloop transitions, 100 changer transitions 0/482 dead transitions. [2024-06-21 21:04:59,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 482 transitions, 6462 flow [2024-06-21 21:04:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-21 21:04:59,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-06-21 21:04:59,692 INFO L175 Difference]: Start difference. First operand has 354 places, 431 transitions, 4807 flow. Second operand 10 states and 235 transitions. [2024-06-21 21:04:59,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 482 transitions, 6462 flow [2024-06-21 21:05:04,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 482 transitions, 6248 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 21:05:04,015 INFO L231 Difference]: Finished difference. Result has 358 places, 434 transitions, 4929 flow [2024-06-21 21:05:04,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4929, PETRI_PLACES=358, PETRI_TRANSITIONS=434} [2024-06-21 21:05:04,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-21 21:05:04,020 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 434 transitions, 4929 flow [2024-06-21 21:05:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:04,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:04,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:04,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2024-06-21 21:05:04,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:04,226 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:04,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2083681611, now seen corresponding path program 18 times [2024-06-21 21:05:04,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:05:04,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285716348] [2024-06-21 21:05:04,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:05:04,227 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 [2024-06-21 21:05:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:05:04,228 INFO L229 MonitoredProcess]: Starting monitored process 131 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) [2024-06-21 21:05:04,230 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 (131)] Waiting until timeout for monitored process [2024-06-21 21:05:04,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:05:04,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:05:04,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:05:04,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:05:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:05,613 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:05:05,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:05:05,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285716348] [2024-06-21 21:05:05,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285716348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:05,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:05,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:05,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889506639] [2024-06-21 21:05:05,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:05,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:05:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:05,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:05:05,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 434 transitions, 4929 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:05,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:05,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:05:05,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:07,638 INFO L124 PetriNetUnfolderBase]: 4850/7549 cut-off events. [2024-06-21 21:05:07,638 INFO L125 PetriNetUnfolderBase]: For 3323388/3323391 co-relation queries the response was YES. [2024-06-21 21:05:07,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95209 conditions, 7549 events. 4850/7549 cut-off events. For 3323388/3323391 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 45030 event pairs, 881 based on Foata normal form. 12/7558 useless extension candidates. Maximal degree in co-relation 95032. Up to 6530 conditions per place. [2024-06-21 21:05:07,781 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 365 selfloop transitions, 105 changer transitions 0/485 dead transitions. [2024-06-21 21:05:07,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 485 transitions, 6571 flow [2024-06-21 21:05:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:05:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:05:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-21 21:05:07,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-21 21:05:07,782 INFO L175 Difference]: Start difference. First operand has 358 places, 434 transitions, 4929 flow. Second operand 10 states and 238 transitions. [2024-06-21 21:05:07,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 485 transitions, 6571 flow [2024-06-21 21:05:12,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 485 transitions, 6270 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-21 21:05:12,625 INFO L231 Difference]: Finished difference. Result has 360 places, 436 transitions, 4945 flow [2024-06-21 21:05:12,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4628, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4945, PETRI_PLACES=360, PETRI_TRANSITIONS=436} [2024-06-21 21:05:12,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-21 21:05:12,626 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 436 transitions, 4945 flow [2024-06-21 21:05:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:12,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:12,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:12,629 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 (131)] Forceful destruction successful, exit code 0 [2024-06-21 21:05:12,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:12,829 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:12,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2079212961, now seen corresponding path program 19 times [2024-06-21 21:05:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:05:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318502446] [2024-06-21 21:05:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:05:12,830 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 [2024-06-21 21:05:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:05:12,831 INFO L229 MonitoredProcess]: Starting monitored process 132 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) [2024-06-21 21:05:12,832 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 (132)] Waiting until timeout for monitored process [2024-06-21 21:05:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:12,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:05:12,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:05:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:14,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:05:14,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:05:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318502446] [2024-06-21 21:05:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318502446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:14,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:14,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548189668] [2024-06-21 21:05:14,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:14,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:14,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:05:14,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:14,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:05:14,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 436 transitions, 4945 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:14,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:14,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:05:14,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:16,068 INFO L124 PetriNetUnfolderBase]: 4826/7513 cut-off events. [2024-06-21 21:05:16,069 INFO L125 PetriNetUnfolderBase]: For 3279471/3279474 co-relation queries the response was YES. [2024-06-21 21:05:16,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93269 conditions, 7513 events. 4826/7513 cut-off events. For 3279471/3279474 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44792 event pairs, 856 based on Foata normal form. 12/7517 useless extension candidates. Maximal degree in co-relation 93091. Up to 6376 conditions per place. [2024-06-21 21:05:16,208 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 346 selfloop transitions, 123 changer transitions 0/484 dead transitions. [2024-06-21 21:05:16,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 484 transitions, 6491 flow [2024-06-21 21:05:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:05:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:05:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 21:05:16,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-21 21:05:16,209 INFO L175 Difference]: Start difference. First operand has 360 places, 436 transitions, 4945 flow. Second operand 10 states and 237 transitions. [2024-06-21 21:05:16,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 484 transitions, 6491 flow [2024-06-21 21:05:21,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 484 transitions, 6068 flow, removed 105 selfloop flow, removed 9 redundant places. [2024-06-21 21:05:21,787 INFO L231 Difference]: Finished difference. Result has 361 places, 436 transitions, 4777 flow [2024-06-21 21:05:21,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4777, PETRI_PLACES=361, PETRI_TRANSITIONS=436} [2024-06-21 21:05:21,788 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-21 21:05:21,788 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 436 transitions, 4777 flow [2024-06-21 21:05:21,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:21,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:21,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:21,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2024-06-21 21:05:21,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:21,992 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2083676961, now seen corresponding path program 20 times [2024-06-21 21:05:21,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:05:21,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451835414] [2024-06-21 21:05:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:05:21,993 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 [2024-06-21 21:05:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:05:21,994 INFO L229 MonitoredProcess]: Starting monitored process 133 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) [2024-06-21 21:05:21,995 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 (133)] Waiting until timeout for monitored process [2024-06-21 21:05:22,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:05:22,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:05:22,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:05:22,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:05:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:23,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:05:23,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:05:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451835414] [2024-06-21 21:05:23,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451835414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:23,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:23,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:23,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361997178] [2024-06-21 21:05:23,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:23,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:23,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:05:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:05:23,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 436 transitions, 4777 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:23,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:23,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:05:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:25,531 INFO L124 PetriNetUnfolderBase]: 4810/7489 cut-off events. [2024-06-21 21:05:25,531 INFO L125 PetriNetUnfolderBase]: For 3225035/3225038 co-relation queries the response was YES. [2024-06-21 21:05:25,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91362 conditions, 7489 events. 4810/7489 cut-off events. For 3225035/3225038 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 44636 event pairs, 848 based on Foata normal form. 8/7494 useless extension candidates. Maximal degree in co-relation 91184. Up to 6342 conditions per place. [2024-06-21 21:05:25,658 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 360 selfloop transitions, 111 changer transitions 0/486 dead transitions. [2024-06-21 21:05:25,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 486 transitions, 6337 flow [2024-06-21 21:05:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:05:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:05:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-21 21:05:25,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-21 21:05:25,659 INFO L175 Difference]: Start difference. First operand has 361 places, 436 transitions, 4777 flow. Second operand 10 states and 239 transitions. [2024-06-21 21:05:25,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 486 transitions, 6337 flow [2024-06-21 21:05:32,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 486 transitions, 6032 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 21:05:32,141 INFO L231 Difference]: Finished difference. Result has 362 places, 436 transitions, 4701 flow [2024-06-21 21:05:32,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4701, PETRI_PLACES=362, PETRI_TRANSITIONS=436} [2024-06-21 21:05:32,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-21 21:05:32,141 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 436 transitions, 4701 flow [2024-06-21 21:05:32,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:32,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:32,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:32,144 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 (133)] Forceful destruction successful, exit code 0 [2024-06-21 21:05:32,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:32,345 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:32,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash -494376311, now seen corresponding path program 3 times [2024-06-21 21:05:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:05:32,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265290308] [2024-06-21 21:05:32,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:05:32,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:32,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:05:32,347 INFO L229 MonitoredProcess]: Starting monitored process 134 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) [2024-06-21 21:05:32,376 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 (134)] Waiting until timeout for monitored process [2024-06-21 21:05:32,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:05:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:05:32,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-21 21:05:32,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:05:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:33,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:05:33,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:05:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265290308] [2024-06-21 21:05:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265290308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:33,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:33,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:05:33,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314402381] [2024-06-21 21:05:33,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:33,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:05:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:05:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:05:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:05:33,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:05:33,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 436 transitions, 4701 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:33,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:33,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:05:33,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:35,516 INFO L124 PetriNetUnfolderBase]: 5224/8014 cut-off events. [2024-06-21 21:05:35,516 INFO L125 PetriNetUnfolderBase]: For 3211774/3211774 co-relation queries the response was YES. [2024-06-21 21:05:35,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93150 conditions, 8014 events. 5224/8014 cut-off events. For 3211774/3211774 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46315 event pairs, 1215 based on Foata normal form. 1/7971 useless extension candidates. Maximal degree in co-relation 92971. Up to 7546 conditions per place. [2024-06-21 21:05:35,658 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 377 selfloop transitions, 28 changer transitions 0/456 dead transitions. [2024-06-21 21:05:35,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 456 transitions, 5611 flow [2024-06-21 21:05:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 21:05:35,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837662337662338 [2024-06-21 21:05:35,660 INFO L175 Difference]: Start difference. First operand has 362 places, 436 transitions, 4701 flow. Second operand 7 states and 149 transitions. [2024-06-21 21:05:35,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 456 transitions, 5611 flow [2024-06-21 21:05:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 456 transitions, 5210 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 21:05:42,432 INFO L231 Difference]: Finished difference. Result has 359 places, 439 transitions, 4426 flow [2024-06-21 21:05:42,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4426, PETRI_PLACES=359, PETRI_TRANSITIONS=439} [2024-06-21 21:05:42,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-21 21:05:42,433 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 439 transitions, 4426 flow [2024-06-21 21:05:42,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:42,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:42,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:42,436 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 (134)] Forceful destruction successful, exit code 0 [2024-06-21 21:05:42,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:42,636 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:42,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash -494362423, now seen corresponding path program 1 times [2024-06-21 21:05:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:05:42,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73270064] [2024-06-21 21:05:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:42,637 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 [2024-06-21 21:05:42,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:05:42,638 INFO L229 MonitoredProcess]: Starting monitored process 135 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) [2024-06-21 21:05:42,651 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 (135)] Waiting until timeout for monitored process [2024-06-21 21:05:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:42,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:05:42,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:05:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:43,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:05:43,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:05:43,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73270064] [2024-06-21 21:05:43,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73270064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:43,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:43,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:05:43,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580096071] [2024-06-21 21:05:43,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:43,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:05:43,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:05:43,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:05:43,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:05:43,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:05:43,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 439 transitions, 4426 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:43,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:43,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:05:43,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:45,586 INFO L124 PetriNetUnfolderBase]: 5185/7961 cut-off events. [2024-06-21 21:05:45,586 INFO L125 PetriNetUnfolderBase]: For 3362039/3362061 co-relation queries the response was YES. [2024-06-21 21:05:45,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92553 conditions, 7961 events. 5185/7961 cut-off events. For 3362039/3362061 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 46242 event pairs, 1247 based on Foata normal form. 14/7899 useless extension candidates. Maximal degree in co-relation 92374. Up to 7435 conditions per place. [2024-06-21 21:05:45,727 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 366 selfloop transitions, 39 changer transitions 0/470 dead transitions. [2024-06-21 21:05:45,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 470 transitions, 5660 flow [2024-06-21 21:05:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 21:05:45,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-06-21 21:05:45,729 INFO L175 Difference]: Start difference. First operand has 359 places, 439 transitions, 4426 flow. Second operand 7 states and 156 transitions. [2024-06-21 21:05:45,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 470 transitions, 5660 flow [2024-06-21 21:05:51,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 470 transitions, 5564 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:51,336 INFO L231 Difference]: Finished difference. Result has 363 places, 448 transitions, 4542 flow [2024-06-21 21:05:51,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4542, PETRI_PLACES=363, PETRI_TRANSITIONS=448} [2024-06-21 21:05:51,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-21 21:05:51,337 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 448 transitions, 4542 flow [2024-06-21 21:05:51,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:51,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:51,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:51,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Forceful destruction successful, exit code 0 [2024-06-21 21:05:51,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:51,540 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:51,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1779058075, now seen corresponding path program 3 times [2024-06-21 21:05:51,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:05:51,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973940126] [2024-06-21 21:05:51,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:05:51,541 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 [2024-06-21 21:05:51,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:05:51,542 INFO L229 MonitoredProcess]: Starting monitored process 136 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) [2024-06-21 21:05:51,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2024-06-21 21:05:51,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:05:51,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:05:51,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:05:51,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:05:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:52,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:05:52,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:05:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973940126] [2024-06-21 21:05:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973940126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:52,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:05:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916660071] [2024-06-21 21:05:52,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:05:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:05:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:05:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:05:52,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:05:52,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 448 transitions, 4542 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:52,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:52,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:05:52,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:54,372 INFO L124 PetriNetUnfolderBase]: 5281/8092 cut-off events. [2024-06-21 21:05:54,372 INFO L125 PetriNetUnfolderBase]: For 3331423/3331427 co-relation queries the response was YES. [2024-06-21 21:05:54,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93941 conditions, 8092 events. 5281/8092 cut-off events. For 3331423/3331427 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 46757 event pairs, 1233 based on Foata normal form. 1/8044 useless extension candidates. Maximal degree in co-relation 93760. Up to 7639 conditions per place. [2024-06-21 21:05:54,529 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 391 selfloop transitions, 23 changer transitions 0/465 dead transitions. [2024-06-21 21:05:54,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 465 transitions, 5680 flow [2024-06-21 21:05:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 21:05:54,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2024-06-21 21:05:54,531 INFO L175 Difference]: Start difference. First operand has 363 places, 448 transitions, 4542 flow. Second operand 6 states and 133 transitions. [2024-06-21 21:05:54,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 465 transitions, 5680 flow [2024-06-21 21:05:59,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 465 transitions, 5608 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 21:05:59,502 INFO L231 Difference]: Finished difference. Result has 367 places, 448 transitions, 4522 flow [2024-06-21 21:05:59,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4522, PETRI_PLACES=367, PETRI_TRANSITIONS=448} [2024-06-21 21:05:59,503 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-21 21:05:59,503 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 448 transitions, 4522 flow [2024-06-21 21:05:59,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:59,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:59,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:59,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2024-06-21 21:05:59,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:05:59,706 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:59,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1792390555, now seen corresponding path program 4 times [2024-06-21 21:05:59,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:05:59,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462363090] [2024-06-21 21:05:59,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:05:59,707 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 [2024-06-21 21:05:59,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:05:59,708 INFO L229 MonitoredProcess]: Starting monitored process 137 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) [2024-06-21 21:05:59,708 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 (137)] Waiting until timeout for monitored process [2024-06-21 21:05:59,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:05:59,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:05:59,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:05:59,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:06:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:00,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:06:00,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:06:00,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462363090] [2024-06-21 21:06:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462363090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:00,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:00,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:06:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820406931] [2024-06-21 21:06:00,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:00,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:06:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:06:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:06:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:06:00,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:06:00,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 448 transitions, 4522 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:00,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:00,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:06:00,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:02,822 INFO L124 PetriNetUnfolderBase]: 5286/8099 cut-off events. [2024-06-21 21:06:02,823 INFO L125 PetriNetUnfolderBase]: For 3376654/3376658 co-relation queries the response was YES. [2024-06-21 21:06:02,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94218 conditions, 8099 events. 5286/8099 cut-off events. For 3376654/3376658 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 46793 event pairs, 1219 based on Foata normal form. 1/8051 useless extension candidates. Maximal degree in co-relation 94034. Up to 7661 conditions per place. [2024-06-21 21:06:02,944 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 395 selfloop transitions, 18 changer transitions 0/464 dead transitions. [2024-06-21 21:06:02,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 464 transitions, 5437 flow [2024-06-21 21:06:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:06:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:06:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 21:06:02,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-21 21:06:02,946 INFO L175 Difference]: Start difference. First operand has 367 places, 448 transitions, 4522 flow. Second operand 6 states and 128 transitions. [2024-06-21 21:06:02,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 464 transitions, 5437 flow [2024-06-21 21:06:08,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 464 transitions, 5341 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:08,109 INFO L231 Difference]: Finished difference. Result has 368 places, 451 transitions, 4531 flow [2024-06-21 21:06:08,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4531, PETRI_PLACES=368, PETRI_TRANSITIONS=451} [2024-06-21 21:06:08,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-21 21:06:08,124 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 451 transitions, 4531 flow [2024-06-21 21:06:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:08,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:08,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:08,128 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 (137)] Forceful destruction successful, exit code 0 [2024-06-21 21:06:08,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:06:08,328 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:08,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2040056189, now seen corresponding path program 5 times [2024-06-21 21:06:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:06:08,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637126664] [2024-06-21 21:06:08,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:06:08,329 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 [2024-06-21 21:06:08,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:06:08,330 INFO L229 MonitoredProcess]: Starting monitored process 138 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) [2024-06-21 21:06:08,331 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 (138)] Waiting until timeout for monitored process [2024-06-21 21:06:08,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:06:08,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:06:08,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:06:08,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:06:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:09,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:06:09,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:06:09,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637126664] [2024-06-21 21:06:09,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637126664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:09,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:09,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:06:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797927600] [2024-06-21 21:06:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:06:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:06:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:06:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:06:09,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:06:09,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 451 transitions, 4531 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:09,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:09,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:06:09,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:11,179 INFO L124 PetriNetUnfolderBase]: 5285/8100 cut-off events. [2024-06-21 21:06:11,180 INFO L125 PetriNetUnfolderBase]: For 3414500/3414503 co-relation queries the response was YES. [2024-06-21 21:06:11,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94348 conditions, 8100 events. 5285/8100 cut-off events. For 3414500/3414503 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 46734 event pairs, 1236 based on Foata normal form. 3/8058 useless extension candidates. Maximal degree in co-relation 94164. Up to 7661 conditions per place. [2024-06-21 21:06:11,312 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 392 selfloop transitions, 18 changer transitions 0/461 dead transitions. [2024-06-21 21:06:11,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 461 transitions, 5375 flow [2024-06-21 21:06:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:06:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:06:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 21:06:11,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 21:06:11,314 INFO L175 Difference]: Start difference. First operand has 368 places, 451 transitions, 4531 flow. Second operand 6 states and 125 transitions. [2024-06-21 21:06:11,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 461 transitions, 5375 flow [2024-06-21 21:06:17,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 461 transitions, 5303 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:17,005 INFO L231 Difference]: Finished difference. Result has 370 places, 451 transitions, 4501 flow [2024-06-21 21:06:17,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4501, PETRI_PLACES=370, PETRI_TRANSITIONS=451} [2024-06-21 21:06:17,006 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-21 21:06:17,006 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 451 transitions, 4501 flow [2024-06-21 21:06:17,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:17,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:17,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:17,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Ended with exit code 0 [2024-06-21 21:06:17,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:06:17,208 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:17,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash -121686933, now seen corresponding path program 6 times [2024-06-21 21:06:17,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:06:17,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981150077] [2024-06-21 21:06:17,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:06:17,209 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 [2024-06-21 21:06:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:06:17,210 INFO L229 MonitoredProcess]: Starting monitored process 139 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) [2024-06-21 21:06:17,236 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 (139)] Waiting until timeout for monitored process [2024-06-21 21:06:17,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:06:17,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:06:17,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-21 21:06:17,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:06:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:18,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:06:18,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:06:18,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981150077] [2024-06-21 21:06:18,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981150077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:18,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:18,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:06:18,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407370111] [2024-06-21 21:06:18,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:18,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:06:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:06:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:06:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:06:18,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:06:18,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 451 transitions, 4501 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:18,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:18,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:06:18,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:20,100 INFO L124 PetriNetUnfolderBase]: 5280/8092 cut-off events. [2024-06-21 21:06:20,100 INFO L125 PetriNetUnfolderBase]: For 3452305/3452312 co-relation queries the response was YES. [2024-06-21 21:06:20,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94479 conditions, 8092 events. 5280/8092 cut-off events. For 3452305/3452312 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 46780 event pairs, 1236 based on Foata normal form. 3/8045 useless extension candidates. Maximal degree in co-relation 94294. Up to 7644 conditions per place. [2024-06-21 21:06:20,258 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 384 selfloop transitions, 26 changer transitions 0/461 dead transitions. [2024-06-21 21:06:20,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 461 transitions, 5345 flow [2024-06-21 21:06:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:06:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:06:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 21:06:20,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 21:06:20,260 INFO L175 Difference]: Start difference. First operand has 370 places, 451 transitions, 4501 flow. Second operand 6 states and 126 transitions. [2024-06-21 21:06:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 461 transitions, 5345 flow [2024-06-21 21:06:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 461 transitions, 5269 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:26,504 INFO L231 Difference]: Finished difference. Result has 371 places, 451 transitions, 4483 flow [2024-06-21 21:06:26,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4483, PETRI_PLACES=371, PETRI_TRANSITIONS=451} [2024-06-21 21:06:26,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-21 21:06:26,505 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 451 transitions, 4483 flow [2024-06-21 21:06:26,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:26,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:26,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:26,521 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 (139)] Forceful destruction successful, exit code 0 [2024-06-21 21:06:26,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:06:26,708 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:26,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash -227501599, now seen corresponding path program 2 times [2024-06-21 21:06:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:06:26,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736025085] [2024-06-21 21:06:26,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:06:26,709 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 [2024-06-21 21:06:26,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:06:26,710 INFO L229 MonitoredProcess]: Starting monitored process 140 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) [2024-06-21 21:06:26,711 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 (140)] Waiting until timeout for monitored process [2024-06-21 21:06:26,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:06:26,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:06:26,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:06:26,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:06:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:28,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:06:28,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:06:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736025085] [2024-06-21 21:06:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736025085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:28,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:28,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595797757] [2024-06-21 21:06:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:06:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:28,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:06:28,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 451 transitions, 4483 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:28,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:28,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:06:28,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:29,954 INFO L124 PetriNetUnfolderBase]: 5587/8440 cut-off events. [2024-06-21 21:06:29,955 INFO L125 PetriNetUnfolderBase]: For 3532864/3532864 co-relation queries the response was YES. [2024-06-21 21:06:30,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97185 conditions, 8440 events. 5587/8440 cut-off events. For 3532864/3532864 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 47646 event pairs, 1226 based on Foata normal form. 4/8442 useless extension candidates. Maximal degree in co-relation 96999. Up to 8098 conditions per place. [2024-06-21 21:06:30,110 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 441 selfloop transitions, 38 changer transitions 0/491 dead transitions. [2024-06-21 21:06:30,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 491 transitions, 5670 flow [2024-06-21 21:06:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 21:06:30,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 21:06:30,112 INFO L175 Difference]: Start difference. First operand has 371 places, 451 transitions, 4483 flow. Second operand 9 states and 190 transitions. [2024-06-21 21:06:30,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 491 transitions, 5670 flow [2024-06-21 21:06:36,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 491 transitions, 5582 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:36,184 INFO L231 Difference]: Finished difference. Result has 376 places, 456 transitions, 4623 flow [2024-06-21 21:06:36,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=376, PETRI_TRANSITIONS=456} [2024-06-21 21:06:36,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-21 21:06:36,185 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 456 transitions, 4623 flow [2024-06-21 21:06:36,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:36,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:36,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:36,188 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 (140)] Forceful destruction successful, exit code 0 [2024-06-21 21:06:36,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:06:36,388 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:36,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:36,389 INFO L85 PathProgramCache]: Analyzing trace with hash -439999541, now seen corresponding path program 3 times [2024-06-21 21:06:36,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:06:36,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382564887] [2024-06-21 21:06:36,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:06:36,390 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 [2024-06-21 21:06:36,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:06:36,391 INFO L229 MonitoredProcess]: Starting monitored process 141 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) [2024-06-21 21:06:36,420 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 (141)] Waiting until timeout for monitored process [2024-06-21 21:06:36,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:06:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:06:36,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:06:36,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:06:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:37,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:06:37,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:06:37,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382564887] [2024-06-21 21:06:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382564887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:37,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:37,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:37,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886703032] [2024-06-21 21:06:37,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:37,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:37,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:06:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:37,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:06:37,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 456 transitions, 4623 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:37,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:37,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:06:37,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:39,689 INFO L124 PetriNetUnfolderBase]: 5608/8471 cut-off events. [2024-06-21 21:06:39,690 INFO L125 PetriNetUnfolderBase]: For 3590481/3590481 co-relation queries the response was YES. [2024-06-21 21:06:39,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98722 conditions, 8471 events. 5608/8471 cut-off events. For 3590481/3590481 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 47804 event pairs, 1257 based on Foata normal form. 4/8473 useless extension candidates. Maximal degree in co-relation 98534. Up to 8237 conditions per place. [2024-06-21 21:06:39,820 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 458 selfloop transitions, 21 changer transitions 0/491 dead transitions. [2024-06-21 21:06:39,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 491 transitions, 5779 flow [2024-06-21 21:06:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 21:06:39,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 21:06:39,825 INFO L175 Difference]: Start difference. First operand has 376 places, 456 transitions, 4623 flow. Second operand 9 states and 183 transitions. [2024-06-21 21:06:39,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 491 transitions, 5779 flow [2024-06-21 21:06:47,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 491 transitions, 5598 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:47,317 INFO L231 Difference]: Finished difference. Result has 379 places, 458 transitions, 4609 flow [2024-06-21 21:06:47,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4609, PETRI_PLACES=379, PETRI_TRANSITIONS=458} [2024-06-21 21:06:47,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-21 21:06:47,318 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 458 transitions, 4609 flow [2024-06-21 21:06:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:47,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:47,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:47,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Ended with exit code 0 [2024-06-21 21:06:47,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:06:47,521 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:47,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash 183695667, now seen corresponding path program 21 times [2024-06-21 21:06:47,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:06:47,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520845440] [2024-06-21 21:06:47,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:06:47,522 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 [2024-06-21 21:06:47,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:06:47,523 INFO L229 MonitoredProcess]: Starting monitored process 142 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) [2024-06-21 21:06:47,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2024-06-21 21:06:47,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:06:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:06:47,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:06:47,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:06:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:48,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:06:48,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:06:48,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520845440] [2024-06-21 21:06:48,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520845440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:48,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:48,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:48,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987726388] [2024-06-21 21:06:48,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:48,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:06:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:48,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:49,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:06:49,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 458 transitions, 4609 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:49,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:49,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:06:49,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:51,165 INFO L124 PetriNetUnfolderBase]: 5025/7825 cut-off events. [2024-06-21 21:06:51,165 INFO L125 PetriNetUnfolderBase]: For 3796732/3796732 co-relation queries the response was YES. [2024-06-21 21:06:51,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99215 conditions, 7825 events. 5025/7825 cut-off events. For 3796732/3796732 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 46986 event pairs, 978 based on Foata normal form. 8/7831 useless extension candidates. Maximal degree in co-relation 99026. Up to 6869 conditions per place. [2024-06-21 21:06:51,322 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 429 selfloop transitions, 65 changer transitions 0/510 dead transitions. [2024-06-21 21:06:51,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 510 transitions, 7049 flow [2024-06-21 21:06:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:06:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:06:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 21:06:51,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-06-21 21:06:51,324 INFO L175 Difference]: Start difference. First operand has 379 places, 458 transitions, 4609 flow. Second operand 10 states and 226 transitions. [2024-06-21 21:06:51,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 510 transitions, 7049 flow [2024-06-21 21:06:56,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 510 transitions, 6902 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:56,686 INFO L231 Difference]: Finished difference. Result has 384 places, 463 transitions, 4933 flow [2024-06-21 21:06:56,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4933, PETRI_PLACES=384, PETRI_TRANSITIONS=463} [2024-06-21 21:06:56,687 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 339 predicate places. [2024-06-21 21:06:56,687 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 463 transitions, 4933 flow [2024-06-21 21:06:56,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:56,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:56,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:56,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2024-06-21 21:06:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:06:56,890 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:56,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:56,891 INFO L85 PathProgramCache]: Analyzing trace with hash 183700317, now seen corresponding path program 22 times [2024-06-21 21:06:56,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:06:56,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881912796] [2024-06-21 21:06:56,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:06:56,891 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 [2024-06-21 21:06:56,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:06:56,892 INFO L229 MonitoredProcess]: Starting monitored process 143 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) [2024-06-21 21:06:56,893 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 (143)] Waiting until timeout for monitored process [2024-06-21 21:06:56,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:06:56,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:06:56,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:06:56,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:06:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:58,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:06:58,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:06:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881912796] [2024-06-21 21:06:58,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881912796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:58,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:58,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:58,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100717981] [2024-06-21 21:06:58,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:06:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:58,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:06:58,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 463 transitions, 4933 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:58,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:58,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:06:58,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:00,796 INFO L124 PetriNetUnfolderBase]: 5076/7906 cut-off events. [2024-06-21 21:07:00,797 INFO L125 PetriNetUnfolderBase]: For 3904776/3904776 co-relation queries the response was YES. [2024-06-21 21:07:00,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101278 conditions, 7906 events. 5076/7906 cut-off events. For 3904776/3904776 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 47669 event pairs, 997 based on Foata normal form. 12/7916 useless extension candidates. Maximal degree in co-relation 101087. Up to 7123 conditions per place. [2024-06-21 21:07:00,928 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 432 selfloop transitions, 62 changer transitions 0/510 dead transitions. [2024-06-21 21:07:00,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 510 transitions, 6738 flow [2024-06-21 21:07:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:07:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:07:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 21:07:00,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-21 21:07:00,929 INFO L175 Difference]: Start difference. First operand has 384 places, 463 transitions, 4933 flow. Second operand 10 states and 223 transitions. [2024-06-21 21:07:00,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 510 transitions, 6738 flow [2024-06-21 21:07:06,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 510 transitions, 6394 flow, removed 135 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:06,174 INFO L231 Difference]: Finished difference. Result has 388 places, 466 transitions, 4917 flow [2024-06-21 21:07:06,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4659, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4917, PETRI_PLACES=388, PETRI_TRANSITIONS=466} [2024-06-21 21:07:06,175 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-21 21:07:06,175 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 466 transitions, 4917 flow [2024-06-21 21:07:06,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:06,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:06,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:06,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Forceful destruction successful, exit code 0 [2024-06-21 21:07:06,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:07:06,379 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:06,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash 90778421, now seen corresponding path program 23 times [2024-06-21 21:07:06,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:07:06,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207028748] [2024-06-21 21:07:06,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:07:06,380 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 [2024-06-21 21:07:06,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:07:06,381 INFO L229 MonitoredProcess]: Starting monitored process 144 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) [2024-06-21 21:07:06,382 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 (144)] Waiting until timeout for monitored process [2024-06-21 21:07:06,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:07:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:07:06,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:07:06,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:07:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:07,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:07:07,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:07:07,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207028748] [2024-06-21 21:07:07,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207028748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:07,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:07,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549392712] [2024-06-21 21:07:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:07,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:07,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:07:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:08,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:07:08,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 466 transitions, 4917 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:08,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:08,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:07:08,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:10,625 INFO L124 PetriNetUnfolderBase]: 5127/7987 cut-off events. [2024-06-21 21:07:10,625 INFO L125 PetriNetUnfolderBase]: For 3928748/3928748 co-relation queries the response was YES. [2024-06-21 21:07:10,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101230 conditions, 7987 events. 5127/7987 cut-off events. For 3928748/3928748 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 48303 event pairs, 1022 based on Foata normal form. 12/7992 useless extension candidates. Maximal degree in co-relation 101037. Up to 7298 conditions per place. [2024-06-21 21:07:10,763 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 449 selfloop transitions, 48 changer transitions 0/513 dead transitions. [2024-06-21 21:07:10,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 513 transitions, 6668 flow [2024-06-21 21:07:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:07:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:07:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 21:07:10,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-21 21:07:10,764 INFO L175 Difference]: Start difference. First operand has 388 places, 466 transitions, 4917 flow. Second operand 10 states and 223 transitions. [2024-06-21 21:07:10,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 513 transitions, 6668 flow [2024-06-21 21:07:16,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 513 transitions, 6445 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-21 21:07:16,104 INFO L231 Difference]: Finished difference. Result has 390 places, 469 transitions, 4930 flow [2024-06-21 21:07:16,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4930, PETRI_PLACES=390, PETRI_TRANSITIONS=469} [2024-06-21 21:07:16,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-21 21:07:16,105 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 469 transitions, 4930 flow [2024-06-21 21:07:16,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:16,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:16,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:16,110 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 (144)] Forceful destruction successful, exit code 0 [2024-06-21 21:07:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:07:16,308 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:16,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -152467721, now seen corresponding path program 4 times [2024-06-21 21:07:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:07:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700934215] [2024-06-21 21:07:16,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:07:16,309 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 [2024-06-21 21:07:16,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:07:16,310 INFO L229 MonitoredProcess]: Starting monitored process 145 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) [2024-06-21 21:07:16,311 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 (145)] Waiting until timeout for monitored process [2024-06-21 21:07:16,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:07:16,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:07:16,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:07:16,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:07:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:17,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:07:17,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:07:17,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700934215] [2024-06-21 21:07:17,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700934215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:17,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:17,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:17,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732149123] [2024-06-21 21:07:17,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:17,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:17,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:07:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:17,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:07:17,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 469 transitions, 4930 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:17,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:17,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:07:17,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:20,395 INFO L124 PetriNetUnfolderBase]: 5912/8951 cut-off events. [2024-06-21 21:07:20,395 INFO L125 PetriNetUnfolderBase]: For 3956370/3956370 co-relation queries the response was YES. [2024-06-21 21:07:20,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106429 conditions, 8951 events. 5912/8951 cut-off events. For 3956370/3956370 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 51434 event pairs, 1315 based on Foata normal form. 4/8953 useless extension candidates. Maximal degree in co-relation 106235. Up to 8703 conditions per place. [2024-06-21 21:07:20,561 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 470 selfloop transitions, 22 changer transitions 0/504 dead transitions. [2024-06-21 21:07:20,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 504 transitions, 6116 flow [2024-06-21 21:07:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 21:07:20,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 21:07:20,563 INFO L175 Difference]: Start difference. First operand has 390 places, 469 transitions, 4930 flow. Second operand 9 states and 183 transitions. [2024-06-21 21:07:20,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 504 transitions, 6116 flow [2024-06-21 21:07:27,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 504 transitions, 5915 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 21:07:27,075 INFO L231 Difference]: Finished difference. Result has 391 places, 471 transitions, 4904 flow [2024-06-21 21:07:27,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4904, PETRI_PLACES=391, PETRI_TRANSITIONS=471} [2024-06-21 21:07:27,075 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-21 21:07:27,075 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 471 transitions, 4904 flow [2024-06-21 21:07:27,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:27,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:27,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:27,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2024-06-21 21:07:27,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:07:27,279 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:27,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1945867863, now seen corresponding path program 24 times [2024-06-21 21:07:27,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:07:27,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721421706] [2024-06-21 21:07:27,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:07:27,279 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 [2024-06-21 21:07:27,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:07:27,280 INFO L229 MonitoredProcess]: Starting monitored process 146 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) [2024-06-21 21:07:27,281 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 (146)] Waiting until timeout for monitored process [2024-06-21 21:07:27,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:07:27,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:07:27,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:07:27,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:07:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:28,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:07:28,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:07:28,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721421706] [2024-06-21 21:07:28,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721421706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:28,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:28,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:28,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000864202] [2024-06-21 21:07:28,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:07:28,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:28,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:07:28,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 471 transitions, 4904 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:28,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:28,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:07:28,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:31,328 INFO L124 PetriNetUnfolderBase]: 5195/8105 cut-off events. [2024-06-21 21:07:31,328 INFO L125 PetriNetUnfolderBase]: For 4047948/4047948 co-relation queries the response was YES. [2024-06-21 21:07:31,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102443 conditions, 8105 events. 5195/8105 cut-off events. For 4047948/4047948 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 49129 event pairs, 1012 based on Foata normal form. 12/8115 useless extension candidates. Maximal degree in co-relation 102248. Up to 7252 conditions per place. [2024-06-21 21:07:31,458 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 423 selfloop transitions, 80 changer transitions 0/519 dead transitions. [2024-06-21 21:07:31,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 519 transitions, 6742 flow [2024-06-21 21:07:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:07:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:07:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 21:07:31,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-21 21:07:31,460 INFO L175 Difference]: Start difference. First operand has 391 places, 471 transitions, 4904 flow. Second operand 10 states and 228 transitions. [2024-06-21 21:07:31,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 519 transitions, 6742 flow [2024-06-21 21:07:36,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 519 transitions, 6585 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 21:07:36,956 INFO L231 Difference]: Finished difference. Result has 394 places, 474 transitions, 5110 flow [2024-06-21 21:07:36,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5110, PETRI_PLACES=394, PETRI_TRANSITIONS=474} [2024-06-21 21:07:36,957 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-21 21:07:36,957 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 474 transitions, 5110 flow [2024-06-21 21:07:36,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:36,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:36,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:36,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2024-06-21 21:07:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:07:37,160 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:37,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 183873297, now seen corresponding path program 25 times [2024-06-21 21:07:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:07:37,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902609824] [2024-06-21 21:07:37,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-21 21:07:37,161 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 [2024-06-21 21:07:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:07:37,162 INFO L229 MonitoredProcess]: Starting monitored process 147 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) [2024-06-21 21:07:37,192 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 (147)] Waiting until timeout for monitored process [2024-06-21 21:07:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:37,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:07:37,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:07:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:38,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:07:38,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:07:38,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902609824] [2024-06-21 21:07:38,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902609824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:38,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:38,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:38,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060448685] [2024-06-21 21:07:38,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:07:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:38,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:07:38,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 474 transitions, 5110 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:38,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:38,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:07:38,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:41,360 INFO L124 PetriNetUnfolderBase]: 5246/8176 cut-off events. [2024-06-21 21:07:41,361 INFO L125 PetriNetUnfolderBase]: For 4112283/4112283 co-relation queries the response was YES. [2024-06-21 21:07:41,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104092 conditions, 8176 events. 5246/8176 cut-off events. For 4112283/4112283 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 49798 event pairs, 1037 based on Foata normal form. 12/8186 useless extension candidates. Maximal degree in co-relation 103896. Up to 7487 conditions per place. [2024-06-21 21:07:41,504 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 454 selfloop transitions, 51 changer transitions 0/521 dead transitions. [2024-06-21 21:07:41,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 521 transitions, 6895 flow [2024-06-21 21:07:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:07:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:07:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 21:07:41,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-21 21:07:41,505 INFO L175 Difference]: Start difference. First operand has 394 places, 474 transitions, 5110 flow. Second operand 10 states and 222 transitions. [2024-06-21 21:07:41,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 521 transitions, 6895 flow [2024-06-21 21:07:48,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 521 transitions, 6558 flow, removed 91 selfloop flow, removed 8 redundant places. [2024-06-21 21:07:48,544 INFO L231 Difference]: Finished difference. Result has 396 places, 477 transitions, 5021 flow [2024-06-21 21:07:48,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5021, PETRI_PLACES=396, PETRI_TRANSITIONS=477} [2024-06-21 21:07:48,545 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-21 21:07:48,545 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 477 transitions, 5021 flow [2024-06-21 21:07:48,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:48,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:48,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:48,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Ended with exit code 0 [2024-06-21 21:07:48,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:07:48,748 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:48,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -152823911, now seen corresponding path program 5 times [2024-06-21 21:07:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:07:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087708031] [2024-06-21 21:07:48,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:07:48,749 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 [2024-06-21 21:07:48,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:07:48,750 INFO L229 MonitoredProcess]: Starting monitored process 148 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) [2024-06-21 21:07:48,762 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 (148)] Waiting until timeout for monitored process [2024-06-21 21:07:48,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:07:48,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:07:48,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:07:48,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:07:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:50,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:07:50,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:07:50,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087708031] [2024-06-21 21:07:50,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087708031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:50,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:50,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715942751] [2024-06-21 21:07:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:50,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:07:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:50,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:07:50,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 477 transitions, 5021 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:50,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:50,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:07:50,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:52,888 INFO L124 PetriNetUnfolderBase]: 6065/9194 cut-off events. [2024-06-21 21:07:52,888 INFO L125 PetriNetUnfolderBase]: For 4128486/4128486 co-relation queries the response was YES. [2024-06-21 21:07:53,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109071 conditions, 9194 events. 6065/9194 cut-off events. For 4128486/4128486 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 53212 event pairs, 1369 based on Foata normal form. 4/9196 useless extension candidates. Maximal degree in co-relation 108874. Up to 8924 conditions per place. [2024-06-21 21:07:53,045 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 472 selfloop transitions, 28 changer transitions 0/512 dead transitions. [2024-06-21 21:07:53,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 512 transitions, 6231 flow [2024-06-21 21:07:53,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 21:07:53,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 21:07:53,047 INFO L175 Difference]: Start difference. First operand has 396 places, 477 transitions, 5021 flow. Second operand 9 states and 184 transitions. [2024-06-21 21:07:53,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 512 transitions, 6231 flow [2024-06-21 21:08:00,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 512 transitions, 6018 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:00,777 INFO L231 Difference]: Finished difference. Result has 397 places, 479 transitions, 5004 flow [2024-06-21 21:08:00,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5004, PETRI_PLACES=397, PETRI_TRANSITIONS=479} [2024-06-21 21:08:00,777 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-21 21:08:00,777 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 479 transitions, 5004 flow [2024-06-21 21:08:00,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:00,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:00,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:00,788 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 (148)] Forceful destruction successful, exit code 0 [2024-06-21 21:08:00,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:08:00,981 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:00,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash 47788833, now seen corresponding path program 26 times [2024-06-21 21:08:00,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:08:00,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129225248] [2024-06-21 21:08:00,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 21:08:00,982 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 [2024-06-21 21:08:00,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:08:00,983 INFO L229 MonitoredProcess]: Starting monitored process 149 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) [2024-06-21 21:08:00,984 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 (149)] Waiting until timeout for monitored process [2024-06-21 21:08:01,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:08:01,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:08:01,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:08:01,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:08:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:02,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:08:02,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:08:02,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129225248] [2024-06-21 21:08:02,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129225248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:02,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:02,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:02,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502407970] [2024-06-21 21:08:02,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:02,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:02,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:08:02,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:02,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:02,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:08:02,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 479 transitions, 5004 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:02,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:02,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:08:02,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:05,010 INFO L124 PetriNetUnfolderBase]: 5372/8394 cut-off events. [2024-06-21 21:08:05,010 INFO L125 PetriNetUnfolderBase]: For 4309595/4309595 co-relation queries the response was YES. [2024-06-21 21:08:05,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107822 conditions, 8394 events. 5372/8394 cut-off events. For 4309595/4309595 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 51453 event pairs, 1028 based on Foata normal form. 8/8400 useless extension candidates. Maximal degree in co-relation 107624. Up to 7381 conditions per place. [2024-06-21 21:08:05,171 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 430 selfloop transitions, 86 changer transitions 0/532 dead transitions. [2024-06-21 21:08:05,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 532 transitions, 7576 flow [2024-06-21 21:08:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:08:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:08:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 21:08:05,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 21:08:05,173 INFO L175 Difference]: Start difference. First operand has 397 places, 479 transitions, 5004 flow. Second operand 10 states and 231 transitions. [2024-06-21 21:08:05,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 532 transitions, 7576 flow [2024-06-21 21:08:12,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 532 transitions, 7408 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:12,542 INFO L231 Difference]: Finished difference. Result has 401 places, 484 transitions, 5376 flow [2024-06-21 21:08:12,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4836, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5376, PETRI_PLACES=401, PETRI_TRANSITIONS=484} [2024-06-21 21:08:12,543 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-21 21:08:12,543 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 484 transitions, 5376 flow [2024-06-21 21:08:12,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:12,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:12,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:12,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Ended with exit code 0 [2024-06-21 21:08:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:08:12,746 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:12,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash 47966463, now seen corresponding path program 27 times [2024-06-21 21:08:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:08:12,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339613894] [2024-06-21 21:08:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-21 21:08:12,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:08:12,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:08:12,748 INFO L229 MonitoredProcess]: Starting monitored process 150 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) [2024-06-21 21:08:12,749 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 (150)] Waiting until timeout for monitored process [2024-06-21 21:08:12,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-21 21:08:12,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:08:12,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:08:12,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:08:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:14,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:08:14,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:08:14,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339613894] [2024-06-21 21:08:14,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339613894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:14,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:14,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:14,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557840648] [2024-06-21 21:08:14,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:14,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:14,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:08:14,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:14,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:14,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:08:14,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 484 transitions, 5376 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:14,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:14,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:08:14,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:16,819 INFO L124 PetriNetUnfolderBase]: 5365/8380 cut-off events. [2024-06-21 21:08:16,820 INFO L125 PetriNetUnfolderBase]: For 4294176/4294176 co-relation queries the response was YES. [2024-06-21 21:08:16,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106647 conditions, 8380 events. 5365/8380 cut-off events. For 4294176/4294176 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 51367 event pairs, 1028 based on Foata normal form. 12/8390 useless extension candidates. Maximal degree in co-relation 106447. Up to 7540 conditions per place. [2024-06-21 21:08:16,963 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 437 selfloop transitions, 75 changer transitions 0/528 dead transitions. [2024-06-21 21:08:16,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 528 transitions, 7056 flow [2024-06-21 21:08:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:08:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:08:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 21:08:16,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-21 21:08:16,964 INFO L175 Difference]: Start difference. First operand has 401 places, 484 transitions, 5376 flow. Second operand 10 states and 225 transitions. [2024-06-21 21:08:16,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 528 transitions, 7056 flow [2024-06-21 21:08:23,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 528 transitions, 6640 flow, removed 161 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:23,854 INFO L231 Difference]: Finished difference. Result has 405 places, 484 transitions, 5119 flow [2024-06-21 21:08:23,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5119, PETRI_PLACES=405, PETRI_TRANSITIONS=484} [2024-06-21 21:08:23,854 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 360 predicate places. [2024-06-21 21:08:23,855 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 484 transitions, 5119 flow [2024-06-21 21:08:23,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:23,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:23,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:23,860 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 (150)] Forceful destruction successful, exit code 0 [2024-06-21 21:08:24,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:08:24,058 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:24,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 43204863, now seen corresponding path program 28 times [2024-06-21 21:08:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:08:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326923117] [2024-06-21 21:08:24,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-21 21:08:24,059 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 [2024-06-21 21:08:24,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:08:24,060 INFO L229 MonitoredProcess]: Starting monitored process 151 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) [2024-06-21 21:08:24,061 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 (151)] Waiting until timeout for monitored process [2024-06-21 21:08:24,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-21 21:08:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:08:24,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:08:24,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:08:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:25,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:08:25,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:08:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326923117] [2024-06-21 21:08:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326923117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:25,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:25,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:25,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484238244] [2024-06-21 21:08:25,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:25,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:25,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:08:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:25,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:08:25,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 484 transitions, 5119 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:25,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:25,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:08:25,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:28,219 INFO L124 PetriNetUnfolderBase]: 5407/8451 cut-off events. [2024-06-21 21:08:28,219 INFO L125 PetriNetUnfolderBase]: For 4339780/4339780 co-relation queries the response was YES. [2024-06-21 21:08:28,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107670 conditions, 8451 events. 5407/8451 cut-off events. For 4339780/4339780 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 51968 event pairs, 971 based on Foata normal form. 8/8457 useless extension candidates. Maximal degree in co-relation 107468. Up to 6576 conditions per place. [2024-06-21 21:08:28,362 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 379 selfloop transitions, 142 changer transitions 0/537 dead transitions. [2024-06-21 21:08:28,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 537 transitions, 7725 flow [2024-06-21 21:08:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:08:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:08:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 21:08:28,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 21:08:28,363 INFO L175 Difference]: Start difference. First operand has 405 places, 484 transitions, 5119 flow. Second operand 10 states and 231 transitions. [2024-06-21 21:08:28,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 537 transitions, 7725 flow [2024-06-21 21:08:33,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 537 transitions, 7557 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:08:33,906 INFO L231 Difference]: Finished difference. Result has 407 places, 489 transitions, 5656 flow [2024-06-21 21:08:33,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4951, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5656, PETRI_PLACES=407, PETRI_TRANSITIONS=489} [2024-06-21 21:08:33,907 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-21 21:08:33,907 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 489 transitions, 5656 flow [2024-06-21 21:08:33,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:33,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:33,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:33,937 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 (151)] Forceful destruction successful, exit code 0 [2024-06-21 21:08:34,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:08:34,121 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:34,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash -152824221, now seen corresponding path program 1 times [2024-06-21 21:08:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:08:34,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866314830] [2024-06-21 21:08:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:34,121 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 [2024-06-21 21:08:34,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:08:34,122 INFO L229 MonitoredProcess]: Starting monitored process 152 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) [2024-06-21 21:08:34,124 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 (152)] Waiting until timeout for monitored process [2024-06-21 21:08:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:34,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:08:34,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:08:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:35,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:08:35,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:08:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866314830] [2024-06-21 21:08:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866314830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:35,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354789501] [2024-06-21 21:08:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:35,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:08:35,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:35,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:08:35,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 489 transitions, 5656 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:35,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:35,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:08:35,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:38,211 INFO L124 PetriNetUnfolderBase]: 6274/9523 cut-off events. [2024-06-21 21:08:38,212 INFO L125 PetriNetUnfolderBase]: For 4382525/4382525 co-relation queries the response was YES. [2024-06-21 21:08:38,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114829 conditions, 9523 events. 6274/9523 cut-off events. For 4382525/4382525 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 55627 event pairs, 1432 based on Foata normal form. 2/9523 useless extension candidates. Maximal degree in co-relation 114625. Up to 9257 conditions per place. [2024-06-21 21:08:38,373 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 483 selfloop transitions, 30 changer transitions 0/525 dead transitions. [2024-06-21 21:08:38,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 525 transitions, 6810 flow [2024-06-21 21:08:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 21:08:38,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-21 21:08:38,375 INFO L175 Difference]: Start difference. First operand has 407 places, 489 transitions, 5656 flow. Second operand 9 states and 185 transitions. [2024-06-21 21:08:38,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 525 transitions, 6810 flow [2024-06-21 21:08:46,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 525 transitions, 6394 flow, removed 138 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:46,446 INFO L231 Difference]: Finished difference. Result has 410 places, 492 transitions, 5360 flow [2024-06-21 21:08:46,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5360, PETRI_PLACES=410, PETRI_TRANSITIONS=492} [2024-06-21 21:08:46,446 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 365 predicate places. [2024-06-21 21:08:46,447 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 492 transitions, 5360 flow [2024-06-21 21:08:46,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:46,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:46,452 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 (152)] Forceful destruction successful, exit code 0 [2024-06-21 21:08:46,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:08:46,650 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:46,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -448289375, now seen corresponding path program 29 times [2024-06-21 21:08:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:08:46,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357925027] [2024-06-21 21:08:46,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-21 21:08:46,651 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 [2024-06-21 21:08:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:08:46,652 INFO L229 MonitoredProcess]: Starting monitored process 153 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) [2024-06-21 21:08:46,693 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 (153)] Waiting until timeout for monitored process [2024-06-21 21:08:46,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-21 21:08:46,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:08:46,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-21 21:08:46,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:08:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:48,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:08:48,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:08:48,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357925027] [2024-06-21 21:08:48,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357925027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:48,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:48,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92806139] [2024-06-21 21:08:48,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:48,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:48,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:08:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:48,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 21:08:48,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 492 transitions, 5360 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:48,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:48,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 21:08:48,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:50,866 INFO L124 PetriNetUnfolderBase]: 5378/8407 cut-off events. [2024-06-21 21:08:50,867 INFO L125 PetriNetUnfolderBase]: For 4323710/4323710 co-relation queries the response was YES. [2024-06-21 21:08:50,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104644 conditions, 8407 events. 5378/8407 cut-off events. For 4323710/4323710 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51664 event pairs, 1072 based on Foata normal form. 16/8416 useless extension candidates. Maximal degree in co-relation 104438. Up to 7721 conditions per place. [2024-06-21 21:08:51,009 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 476 selfloop transitions, 41 changer transitions 0/533 dead transitions. [2024-06-21 21:08:51,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 533 transitions, 6502 flow [2024-06-21 21:08:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:08:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:08:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 21:08:51,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-21 21:08:51,011 INFO L175 Difference]: Start difference. First operand has 410 places, 492 transitions, 5360 flow. Second operand 10 states and 216 transitions. [2024-06-21 21:08:51,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 533 transitions, 6502 flow [2024-06-21 21:09:00,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 533 transitions, 6336 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-21 21:09:00,251 INFO L231 Difference]: Finished difference. Result has 412 places, 492 transitions, 5285 flow [2024-06-21 21:09:00,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5194, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5285, PETRI_PLACES=412, PETRI_TRANSITIONS=492} [2024-06-21 21:09:00,251 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-21 21:09:00,251 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 492 transitions, 5285 flow [2024-06-21 21:09:00,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:00,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:00,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:00,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Ended with exit code 0 [2024-06-21 21:09:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-21 21:09:00,455 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:00,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash 190375671, now seen corresponding path program 6 times [2024-06-21 21:09:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-21 21:09:00,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960238004] [2024-06-21 21:09:00,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-21 21:09:00,455 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 [2024-06-21 21:09:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-21 21:09:00,456 INFO L229 MonitoredProcess]: Starting monitored process 154 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) [2024-06-21 21:09:00,457 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 (154)] Waiting until timeout for monitored process [2024-06-21 21:09:00,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-21 21:09:00,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 21:09:00,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-21 21:09:00,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 21:09:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:01,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 21:09:01,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-21 21:09:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960238004] [2024-06-21 21:09:01,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960238004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:01,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:01,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:01,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546906066] [2024-06-21 21:09:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:01,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-21 21:09:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:01,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 21:09:01,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 492 transitions, 5285 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:01,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:01,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 21:09:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand