./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 17:12:57,860 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 17:12:57,896 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 17:12:57,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 17:12:57,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 17:12:57,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 17:12:57,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 17:12:57,913 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 17:12:57,914 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 17:12:57,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 17:12:57,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 17:12:57,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 17:12:57,915 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 17:12:57,915 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 17:12:57,915 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 17:12:57,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 17:12:57,916 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 17:12:57,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 17:12:57,917 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 17:12:57,917 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 17:12:57,917 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 17:12:57,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 17:12:57,918 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 17:12:57,918 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 17:12:57,919 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 17:12:57,919 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 17:12:57,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 17:12:57,920 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 17:12:57,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 17:12:57,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 17:12:57,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:12:57,921 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 17:12:57,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 17:12:57,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 17:12:57,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 17:12:57,922 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 17:12:57,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 17:12:57,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 17:12:57,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 17:12:57,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 17:12:58,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 17:12:58,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 17:12:58,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 17:12:58,156 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 17:12:58,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 17:12:58,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-11-22 17:12:59,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 17:12:59,420 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 17:12:59,421 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-11-22 17:12:59,428 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9cd9011a/2f8aab80053043bf9a907e69a843dd7c/FLAG0c4b6d441 [2023-11-22 17:12:59,446 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9cd9011a/2f8aab80053043bf9a907e69a843dd7c [2023-11-22 17:12:59,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 17:12:59,449 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 17:12:59,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 17:12:59,450 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 17:12:59,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 17:12:59,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:12:59" (1/1) ... [2023-11-22 17:12:59,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698aea26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:12:59, skipping insertion in model container [2023-11-22 17:12:59,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:12:59" (1/1) ... [2023-11-22 17:12:59,478 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 17:12:59,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:12:59,686 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-22 17:12:59,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ac533ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:12:59, skipping insertion in model container [2023-11-22 17:12:59,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 17:12:59,687 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-22 17:12:59,689 INFO L158 Benchmark]: Toolchain (without parser) took 238.44ms. Allocated memory is still 172.0MB. Free memory was 99.6MB in the beginning and 88.9MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 17:12:59,689 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 172.0MB. Free memory was 124.2MB in the beginning and 124.0MB in the end (delta: 243.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 17:12:59,690 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.89ms. Allocated memory is still 172.0MB. Free memory was 99.4MB in the beginning and 88.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 17:12:59,691 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 172.0MB. Free memory was 124.2MB in the beginning and 124.0MB in the end (delta: 243.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.89ms. Allocated memory is still 172.0MB. Free memory was 99.4MB in the beginning and 88.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 17:13:01,560 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 17:13:01,642 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-22 17:13:01,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 17:13:01,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 17:13:01,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 17:13:01,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 17:13:01,680 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 17:13:01,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 17:13:01,684 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 17:13:01,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 17:13:01,685 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 17:13:01,685 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 17:13:01,686 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 17:13:01,686 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 17:13:01,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 17:13:01,687 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 17:13:01,687 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 17:13:01,687 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 17:13:01,687 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 17:13:01,687 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 17:13:01,688 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 17:13:01,688 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 17:13:01,689 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-22 17:13:01,689 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-22 17:13:01,689 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 17:13:01,689 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 17:13:01,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 17:13:01,690 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 17:13:01,690 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 17:13:01,691 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 17:13:01,691 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 17:13:01,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:13:01,692 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 17:13:01,692 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 17:13:01,692 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-22 17:13:01,692 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-22 17:13:01,693 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 17:13:01,693 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 17:13:01,694 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 17:13:01,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 17:13:01,694 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-22 17:13:01,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 17:13:01,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 17:13:01,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 17:13:01,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 17:13:01,991 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 17:13:01,991 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 17:13:01,992 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-11-22 17:13:03,075 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 17:13:03,263 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 17:13:03,265 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-11-22 17:13:03,276 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4160412/2cb5c23278424712993fb072d454b9f0/FLAGeacbcf4fc [2023-11-22 17:13:03,290 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4160412/2cb5c23278424712993fb072d454b9f0 [2023-11-22 17:13:03,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 17:13:03,293 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 17:13:03,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 17:13:03,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 17:13:03,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 17:13:03,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168872ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03, skipping insertion in model container [2023-11-22 17:13:03,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,329 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 17:13:03,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:13:03,521 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-22 17:13:03,529 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 17:13:03,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:13:03,563 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 17:13:03,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:13:03,613 INFO L206 MainTranslator]: Completed translation [2023-11-22 17:13:03,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03 WrapperNode [2023-11-22 17:13:03,614 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 17:13:03,614 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 17:13:03,615 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 17:13:03,615 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 17:13:03,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,637 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,661 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 208 [2023-11-22 17:13:03,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 17:13:03,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 17:13:03,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 17:13:03,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 17:13:03,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,675 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,695 INFO L189 HeapSplitter]: Split 23 memory accesses to 5 slices as follows [2, 15, 2, 2, 2] [2023-11-22 17:13:03,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,696 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,713 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 17:13:03,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 17:13:03,714 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 17:13:03,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 17:13:03,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (1/1) ... [2023-11-22 17:13:03,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:13:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:13:03,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 17:13:03,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 17:13:03,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 17:13:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-22 17:13:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-22 17:13:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-22 17:13:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-22 17:13:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-22 17:13:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 17:13:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-22 17:13:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-22 17:13:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-22 17:13:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-22 17:13:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-22 17:13:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-22 17:13:03,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-22 17:13:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-22 17:13:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-22 17:13:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-22 17:13:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-22 17:13:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 17:13:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 17:13:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 17:13:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 17:13:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-22 17:13:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-22 17:13:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-22 17:13:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-22 17:13:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-22 17:13:03,794 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 17:13:03,902 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 17:13:03,904 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 17:13:04,488 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 17:13:04,711 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 17:13:04,712 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-22 17:13:04,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:13:04 BoogieIcfgContainer [2023-11-22 17:13:04,713 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 17:13:04,715 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 17:13:04,715 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 17:13:04,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 17:13:04,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 05:13:03" (1/3) ... [2023-11-22 17:13:04,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecaec5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:13:04, skipping insertion in model container [2023-11-22 17:13:04,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:13:03" (2/3) ... [2023-11-22 17:13:04,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecaec5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:13:04, skipping insertion in model container [2023-11-22 17:13:04,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:13:04" (3/3) ... [2023-11-22 17:13:04,722 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2023-11-22 17:13:04,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 17:13:04,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-22 17:13:04,738 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 17:13:04,799 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-22 17:13:04,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 125 transitions, 271 flow [2023-11-22 17:13:04,902 INFO L124 PetriNetUnfolderBase]: 15/122 cut-off events. [2023-11-22 17:13:04,903 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-22 17:13:04,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 122 events. 15/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 351 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2023-11-22 17:13:04,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 125 transitions, 271 flow [2023-11-22 17:13:04,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 121 transitions, 260 flow [2023-11-22 17:13:04,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 17:13:04,933 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a01995c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 17:13:04,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2023-11-22 17:13:04,938 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 17:13:04,938 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-22 17:13:04,938 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 17:13:04,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:04,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 17:13:04,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:04,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:04,944 INFO L85 PathProgramCache]: Analyzing trace with hash 770987, now seen corresponding path program 1 times [2023-11-22 17:13:04,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:04,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109418092] [2023-11-22 17:13:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:04,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:04,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:04,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:04,984 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 (2)] Waiting until timeout for monitored process [2023-11-22 17:13:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:05,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 17:13:05,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:05,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-22 17:13:05,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:05,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:05,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-22 17:13:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:05,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:05,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:05,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:05,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:05,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109418092] [2023-11-22 17:13:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109418092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:05,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:05,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:13:05,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725958816] [2023-11-22 17:13:05,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:13:05,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:05,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:13:05,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:13:05,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 125 [2023-11-22 17:13:05,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:05,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:05,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 125 [2023-11-22 17:13:05,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:05,737 INFO L124 PetriNetUnfolderBase]: 703/1397 cut-off events. [2023-11-22 17:13:05,737 INFO L125 PetriNetUnfolderBase]: For 84/85 co-relation queries the response was YES. [2023-11-22 17:13:05,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 1397 events. 703/1397 cut-off events. For 84/85 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7971 event pairs, 266 based on Foata normal form. 1/831 useless extension candidates. Maximal degree in co-relation 2020. Up to 879 conditions per place. [2023-11-22 17:13:05,749 INFO L140 encePairwiseOnDemand]: 119/125 looper letters, 39 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-11-22 17:13:05,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 116 transitions, 332 flow [2023-11-22 17:13:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:13:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:13:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-11-22 17:13:05,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.752 [2023-11-22 17:13:05,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-11-22 17:13:05,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-11-22 17:13:05,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:05,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-11-22 17:13:05,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:05,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:05,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:05,818 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 260 flow. Second operand 3 states and 282 transitions. [2023-11-22 17:13:05,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 116 transitions, 332 flow [2023-11-22 17:13:05,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 116 transitions, 320 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-22 17:13:05,825 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 242 flow [2023-11-22 17:13:05,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2023-11-22 17:13:05,845 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -9 predicate places. [2023-11-22 17:13:05,845 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 242 flow [2023-11-22 17:13:05,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:05,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:05,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 17:13:05,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-22 17:13:06,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:06,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:06,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash 770988, now seen corresponding path program 1 times [2023-11-22 17:13:06,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:06,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594813649] [2023-11-22 17:13:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:06,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:06,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:06,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:06,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-22 17:13:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:06,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 17:13:06,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:06,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-22 17:13:06,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:06,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-22 17:13:06,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:06,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:06,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:06,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:06,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:06,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:06,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:06,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594813649] [2023-11-22 17:13:06,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594813649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:06,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:06,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:13:06,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600246514] [2023-11-22 17:13:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:13:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:13:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:13:06,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 125 [2023-11-22 17:13:06,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:06,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:06,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 125 [2023-11-22 17:13:06,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:07,013 INFO L124 PetriNetUnfolderBase]: 706/1406 cut-off events. [2023-11-22 17:13:07,013 INFO L125 PetriNetUnfolderBase]: For 21/22 co-relation queries the response was YES. [2023-11-22 17:13:07,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332 conditions, 1406 events. 706/1406 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8024 event pairs, 266 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 2282. Up to 892 conditions per place. [2023-11-22 17:13:07,025 INFO L140 encePairwiseOnDemand]: 112/125 looper letters, 43 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2023-11-22 17:13:07,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 125 transitions, 368 flow [2023-11-22 17:13:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:13:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:13:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 372 transitions. [2023-11-22 17:13:07,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.744 [2023-11-22 17:13:07,028 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 372 transitions. [2023-11-22 17:13:07,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 372 transitions. [2023-11-22 17:13:07,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:07,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 372 transitions. [2023-11-22 17:13:07,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:07,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:07,031 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:07,031 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 242 flow. Second operand 4 states and 372 transitions. [2023-11-22 17:13:07,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 125 transitions, 368 flow [2023-11-22 17:13:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:13:07,034 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 320 flow [2023-11-22 17:13:07,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2023-11-22 17:13:07,035 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -5 predicate places. [2023-11-22 17:13:07,035 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 320 flow [2023-11-22 17:13:07,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:07,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:07,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-22 17:13:07,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:07,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:07,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:07,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:07,239 INFO L85 PathProgramCache]: Analyzing trace with hash 740945681, now seen corresponding path program 1 times [2023-11-22 17:13:07,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:07,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673724296] [2023-11-22 17:13:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:07,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:07,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:07,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-22 17:13:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:07,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 17:13:07,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:07,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-22 17:13:07,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:07,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:07,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:07,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-22 17:13:07,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:07,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:07,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:07,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:07,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:07,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:13:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:07,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:07,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673724296] [2023-11-22 17:13:07,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673724296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:13:07,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:13:07,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-22 17:13:07,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138131153] [2023-11-22 17:13:07,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:13:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 17:13:07,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 17:13:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-22 17:13:09,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 125 [2023-11-22 17:13:09,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 320 flow. Second operand has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:09,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:09,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 125 [2023-11-22 17:13:09,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:10,798 INFO L124 PetriNetUnfolderBase]: 715/1433 cut-off events. [2023-11-22 17:13:10,798 INFO L125 PetriNetUnfolderBase]: For 29/30 co-relation queries the response was YES. [2023-11-22 17:13:10,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2450 conditions, 1433 events. 715/1433 cut-off events. For 29/30 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8210 event pairs, 266 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 2296. Up to 895 conditions per place. [2023-11-22 17:13:10,805 INFO L140 encePairwiseOnDemand]: 112/125 looper letters, 43 selfloop transitions, 37 changer transitions 0/152 dead transitions. [2023-11-22 17:13:10,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 600 flow [2023-11-22 17:13:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 17:13:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 17:13:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 879 transitions. [2023-11-22 17:13:10,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7032 [2023-11-22 17:13:10,809 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 879 transitions. [2023-11-22 17:13:10,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 879 transitions. [2023-11-22 17:13:10,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:10,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 879 transitions. [2023-11-22 17:13:10,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.9) internal successors, (879), 10 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:10,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 125.0) internal successors, (1375), 11 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:10,814 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 125.0) internal successors, (1375), 11 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:10,814 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 320 flow. Second operand 10 states and 879 transitions. [2023-11-22 17:13:10,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 600 flow [2023-11-22 17:13:10,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 152 transitions, 600 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 17:13:10,817 INFO L231 Difference]: Finished difference. Result has 123 places, 152 transitions, 564 flow [2023-11-22 17:13:10,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=564, PETRI_PLACES=123, PETRI_TRANSITIONS=152} [2023-11-22 17:13:10,818 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 7 predicate places. [2023-11-22 17:13:10,818 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 152 transitions, 564 flow [2023-11-22 17:13:10,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:10,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:10,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 17:13:10,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:11,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:11,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:11,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash 740979200, now seen corresponding path program 1 times [2023-11-22 17:13:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:11,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271463431] [2023-11-22 17:13:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:11,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:11,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:11,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-22 17:13:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:11,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 17:13:11,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:11,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-22 17:13:11,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,176 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:11,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-22 17:13:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,204 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:11,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-22 17:13:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-22 17:13:11,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,280 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-22 17:13:11,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2023-11-22 17:13:11,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,322 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:11,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-22 17:13:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-22 17:13:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:11,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-11-22 17:13:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:11,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:11,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:11,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271463431] [2023-11-22 17:13:11,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271463431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:11,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:11,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:13:11,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571307651] [2023-11-22 17:13:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:11,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:13:11,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:13:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:13:11,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2023-11-22 17:13:11,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 152 transitions, 564 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:11,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:11,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2023-11-22 17:13:11,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:11,839 INFO L124 PetriNetUnfolderBase]: 715/1396 cut-off events. [2023-11-22 17:13:11,839 INFO L125 PetriNetUnfolderBase]: For 61/62 co-relation queries the response was YES. [2023-11-22 17:13:11,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1396 events. 715/1396 cut-off events. For 61/62 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7680 event pairs, 266 based on Foata normal form. 65/933 useless extension candidates. Maximal degree in co-relation 2387. Up to 923 conditions per place. [2023-11-22 17:13:11,854 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 76 selfloop transitions, 1 changer transitions 0/150 dead transitions. [2023-11-22 17:13:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 714 flow [2023-11-22 17:13:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:13:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:13:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-22 17:13:11,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7546666666666667 [2023-11-22 17:13:11,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-22 17:13:11,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-22 17:13:11,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:11,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-22 17:13:11,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:11,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:11,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:11,859 INFO L175 Difference]: Start difference. First operand has 123 places, 152 transitions, 564 flow. Second operand 3 states and 283 transitions. [2023-11-22 17:13:11,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 714 flow [2023-11-22 17:13:11,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 150 transitions, 619 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-22 17:13:11,864 INFO L231 Difference]: Finished difference. Result has 119 places, 150 transitions, 467 flow [2023-11-22 17:13:11,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=119, PETRI_TRANSITIONS=150} [2023-11-22 17:13:11,865 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 3 predicate places. [2023-11-22 17:13:11,865 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 150 transitions, 467 flow [2023-11-22 17:13:11,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:11,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:11,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 17:13:11,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:12,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:12,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:12,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:12,069 INFO L85 PathProgramCache]: Analyzing trace with hash 740979201, now seen corresponding path program 1 times [2023-11-22 17:13:12,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:12,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017454917] [2023-11-22 17:13:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:12,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:12,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:12,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:12,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-22 17:13:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:12,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 17:13:12,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 17:13:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-22 17:13:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-22 17:13:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:12,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-22 17:13:12,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:12,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-22 17:13:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:12,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:12,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:12,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017454917] [2023-11-22 17:13:12,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017454917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:12,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:12,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:13:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749724609] [2023-11-22 17:13:12,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:12,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:13:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:13:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:13:12,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2023-11-22 17:13:12,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 150 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:12,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:12,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2023-11-22 17:13:12,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:12,806 INFO L124 PetriNetUnfolderBase]: 715/1359 cut-off events. [2023-11-22 17:13:12,806 INFO L125 PetriNetUnfolderBase]: For 41/42 co-relation queries the response was YES. [2023-11-22 17:13:12,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2394 conditions, 1359 events. 715/1359 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7225 event pairs, 266 based on Foata normal form. 65/931 useless extension candidates. Maximal degree in co-relation 2381. Up to 923 conditions per place. [2023-11-22 17:13:12,820 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 76 selfloop transitions, 1 changer transitions 0/148 dead transitions. [2023-11-22 17:13:12,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 148 transitions, 617 flow [2023-11-22 17:13:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:13:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:13:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-22 17:13:12,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7546666666666667 [2023-11-22 17:13:12,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-22 17:13:12,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-22 17:13:12,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:12,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-22 17:13:12,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:12,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:12,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:12,824 INFO L175 Difference]: Start difference. First operand has 119 places, 150 transitions, 467 flow. Second operand 3 states and 283 transitions. [2023-11-22 17:13:12,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 148 transitions, 617 flow [2023-11-22 17:13:12,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 148 transitions, 616 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:12,829 INFO L231 Difference]: Finished difference. Result has 118 places, 148 transitions, 464 flow [2023-11-22 17:13:12,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=118, PETRI_TRANSITIONS=148} [2023-11-22 17:13:12,831 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 2 predicate places. [2023-11-22 17:13:12,831 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 148 transitions, 464 flow [2023-11-22 17:13:12,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:12,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:12,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:12,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:13,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:13,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1619714240, now seen corresponding path program 1 times [2023-11-22 17:13:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:13,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409813333] [2023-11-22 17:13:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:13,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:13,036 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:13,037 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 (7)] Waiting until timeout for monitored process [2023-11-22 17:13:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:13,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 17:13:13,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-22 17:13:13,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 17:13:13,218 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:13,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:13,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-22 17:13:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:13,283 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:13,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-22 17:13:13,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:13,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-22 17:13:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:13,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:13,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409813333] [2023-11-22 17:13:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409813333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:13,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:13,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:13:13,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094269600] [2023-11-22 17:13:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:13,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:13:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:13:13,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:13:13,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2023-11-22 17:13:13,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 148 transitions, 464 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:13,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:13,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2023-11-22 17:13:13,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:13,745 INFO L124 PetriNetUnfolderBase]: 715/1345 cut-off events. [2023-11-22 17:13:13,746 INFO L125 PetriNetUnfolderBase]: For 41/42 co-relation queries the response was YES. [2023-11-22 17:13:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1345 events. 715/1345 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7051 event pairs, 266 based on Foata normal form. 16/882 useless extension candidates. Maximal degree in co-relation 2367. Up to 923 conditions per place. [2023-11-22 17:13:13,770 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 76 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2023-11-22 17:13:13,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 146 transitions, 614 flow [2023-11-22 17:13:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:13:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:13:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-22 17:13:13,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7546666666666667 [2023-11-22 17:13:13,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-22 17:13:13,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-22 17:13:13,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:13,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-22 17:13:13,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:13,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:13,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:13,774 INFO L175 Difference]: Start difference. First operand has 118 places, 148 transitions, 464 flow. Second operand 3 states and 283 transitions. [2023-11-22 17:13:13,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 146 transitions, 614 flow [2023-11-22 17:13:13,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 146 transitions, 613 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:13,776 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 461 flow [2023-11-22 17:13:13,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=461, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2023-11-22 17:13:13,777 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 1 predicate places. [2023-11-22 17:13:13,777 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 461 flow [2023-11-22 17:13:13,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:13,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:13,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:13,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:13,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1619714241, now seen corresponding path program 1 times [2023-11-22 17:13:13,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:13,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696541667] [2023-11-22 17:13:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:13,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:13,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:13,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:13,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-22 17:13:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:14,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 17:13:14,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-22 17:13:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,152 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:14,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-22 17:13:14,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-22 17:13:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,203 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:14,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-22 17:13:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,226 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:14,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-22 17:13:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 17:13:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 17:13:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,283 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:14,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-22 17:13:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:14,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-22 17:13:14,336 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-22 17:13:14,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-22 17:13:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:14,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:14,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696541667] [2023-11-22 17:13:14,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696541667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:14,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:14,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:13:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552318960] [2023-11-22 17:13:14,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:13:14,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:14,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:13:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:13:14,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2023-11-22 17:13:14,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:14,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:14,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2023-11-22 17:13:14,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:14,718 INFO L124 PetriNetUnfolderBase]: 715/1331 cut-off events. [2023-11-22 17:13:14,718 INFO L125 PetriNetUnfolderBase]: For 41/42 co-relation queries the response was YES. [2023-11-22 17:13:14,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 1331 events. 715/1331 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6887 event pairs, 266 based on Foata normal form. 16/882 useless extension candidates. Maximal degree in co-relation 2353. Up to 923 conditions per place. [2023-11-22 17:13:14,726 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 76 selfloop transitions, 1 changer transitions 0/144 dead transitions. [2023-11-22 17:13:14,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 611 flow [2023-11-22 17:13:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:13:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:13:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-22 17:13:14,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7546666666666667 [2023-11-22 17:13:14,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-22 17:13:14,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-22 17:13:14,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:14,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-22 17:13:14,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:14,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:14,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:14,730 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 461 flow. Second operand 3 states and 283 transitions. [2023-11-22 17:13:14,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 611 flow [2023-11-22 17:13:14,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 610 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:14,732 INFO L231 Difference]: Finished difference. Result has 116 places, 144 transitions, 458 flow [2023-11-22 17:13:14,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=458, PETRI_PLACES=116, PETRI_TRANSITIONS=144} [2023-11-22 17:13:14,732 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 0 predicate places. [2023-11-22 17:13:14,733 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 144 transitions, 458 flow [2023-11-22 17:13:14,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:14,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:14,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:14,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:14,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:14,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:14,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1328523035, now seen corresponding path program 1 times [2023-11-22 17:13:14,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:14,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658162477] [2023-11-22 17:13:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:14,938 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 [2023-11-22 17:13:14,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:14,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:14,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-22 17:13:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:15,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 17:13:15,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:15,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:15,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:15,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658162477] [2023-11-22 17:13:15,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658162477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:15,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:15,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:13:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620586867] [2023-11-22 17:13:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:15,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:13:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:13:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:13:15,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 125 [2023-11-22 17:13:15,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 144 transitions, 458 flow. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:15,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:15,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 125 [2023-11-22 17:13:15,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:15,437 INFO L124 PetriNetUnfolderBase]: 1257/2426 cut-off events. [2023-11-22 17:13:15,437 INFO L125 PetriNetUnfolderBase]: For 75/77 co-relation queries the response was YES. [2023-11-22 17:13:15,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4281 conditions, 2426 events. 1257/2426 cut-off events. For 75/77 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14987 event pairs, 538 based on Foata normal form. 0/1579 useless extension candidates. Maximal degree in co-relation 4265. Up to 1073 conditions per place. [2023-11-22 17:13:15,449 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 134 selfloop transitions, 3 changer transitions 0/203 dead transitions. [2023-11-22 17:13:15,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 203 transitions, 943 flow [2023-11-22 17:13:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:13:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:13:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 405 transitions. [2023-11-22 17:13:15,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.81 [2023-11-22 17:13:15,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 405 transitions. [2023-11-22 17:13:15,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 405 transitions. [2023-11-22 17:13:15,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:15,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 405 transitions. [2023-11-22 17:13:15,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:15,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:15,454 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:15,454 INFO L175 Difference]: Start difference. First operand has 116 places, 144 transitions, 458 flow. Second operand 4 states and 405 transitions. [2023-11-22 17:13:15,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 203 transitions, 943 flow [2023-11-22 17:13:15,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 203 transitions, 942 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:15,461 INFO L231 Difference]: Finished difference. Result has 119 places, 144 transitions, 466 flow [2023-11-22 17:13:15,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=466, PETRI_PLACES=119, PETRI_TRANSITIONS=144} [2023-11-22 17:13:15,463 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 3 predicate places. [2023-11-22 17:13:15,463 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 144 transitions, 466 flow [2023-11-22 17:13:15,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:15,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:15,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:15,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:15,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:15,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:15,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash -141102400, now seen corresponding path program 1 times [2023-11-22 17:13:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:15,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798993791] [2023-11-22 17:13:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:15,668 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 [2023-11-22 17:13:15,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:15,669 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:15,671 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 (10)] Waiting until timeout for monitored process [2023-11-22 17:13:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:15,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 17:13:15,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:13:15,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:15,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:15,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798993791] [2023-11-22 17:13:15,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798993791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:15,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:15,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 17:13:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475997857] [2023-11-22 17:13:15,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:15,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:13:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:13:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:13:15,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 125 [2023-11-22 17:13:15,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 144 transitions, 466 flow. Second operand has 5 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:15,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:15,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 125 [2023-11-22 17:13:15,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:16,427 INFO L124 PetriNetUnfolderBase]: 2644/5197 cut-off events. [2023-11-22 17:13:16,428 INFO L125 PetriNetUnfolderBase]: For 215/219 co-relation queries the response was YES. [2023-11-22 17:13:16,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 5197 events. 2644/5197 cut-off events. For 215/219 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 37843 event pairs, 873 based on Foata normal form. 38/3525 useless extension candidates. Maximal degree in co-relation 9055. Up to 1396 conditions per place. [2023-11-22 17:13:16,455 INFO L140 encePairwiseOnDemand]: 119/125 looper letters, 144 selfloop transitions, 9 changer transitions 0/219 dead transitions. [2023-11-22 17:13:16,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 219 transitions, 977 flow [2023-11-22 17:13:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:13:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 17:13:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 514 transitions. [2023-11-22 17:13:16,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8224 [2023-11-22 17:13:16,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 514 transitions. [2023-11-22 17:13:16,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 514 transitions. [2023-11-22 17:13:16,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:16,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 514 transitions. [2023-11-22 17:13:16,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:16,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:16,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:16,461 INFO L175 Difference]: Start difference. First operand has 119 places, 144 transitions, 466 flow. Second operand 5 states and 514 transitions. [2023-11-22 17:13:16,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 219 transitions, 977 flow [2023-11-22 17:13:16,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 219 transitions, 973 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:16,464 INFO L231 Difference]: Finished difference. Result has 124 places, 145 transitions, 495 flow [2023-11-22 17:13:16,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=495, PETRI_PLACES=124, PETRI_TRANSITIONS=145} [2023-11-22 17:13:16,465 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 8 predicate places. [2023-11-22 17:13:16,465 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 145 transitions, 495 flow [2023-11-22 17:13:16,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:16,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:16,466 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-22 17:13:16,471 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 (10)] Ended with exit code 0 [2023-11-22 17:13:16,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:16,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:16,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1032711744, now seen corresponding path program 2 times [2023-11-22 17:13:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:16,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918152154] [2023-11-22 17:13:16,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:13:16,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:16,677 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:16,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-22 17:13:16,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 17:13:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:13:16,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 17:13:16,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:16,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:13:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:16,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-22 17:13:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:16,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:16,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:17,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:17,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:17,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:17,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:17,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:13:17,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:17,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:17,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:13:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:17,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918152154] [2023-11-22 17:13:17,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918152154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:13:17,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:13:17,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-22 17:13:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709460037] [2023-11-22 17:13:17,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:13:17,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 17:13:17,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:17,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 17:13:17,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-22 17:13:22,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 125 [2023-11-22 17:13:22,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 145 transitions, 495 flow. Second operand has 14 states, 14 states have (on average 80.57142857142857) internal successors, (1128), 14 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:22,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:22,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 125 [2023-11-22 17:13:22,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:25,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 17:13:31,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 17:13:38,911 INFO L124 PetriNetUnfolderBase]: 2339/4749 cut-off events. [2023-11-22 17:13:38,912 INFO L125 PetriNetUnfolderBase]: For 488/493 co-relation queries the response was YES. [2023-11-22 17:13:38,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8562 conditions, 4749 events. 2339/4749 cut-off events. For 488/493 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 34615 event pairs, 1029 based on Foata normal form. 42/3274 useless extension candidates. Maximal degree in co-relation 8541. Up to 3039 conditions per place. [2023-11-22 17:13:38,931 INFO L140 encePairwiseOnDemand]: 112/125 looper letters, 44 selfloop transitions, 91 changer transitions 0/199 dead transitions. [2023-11-22 17:13:38,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 199 transitions, 1047 flow [2023-11-22 17:13:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 17:13:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 17:13:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1890 transitions. [2023-11-22 17:13:38,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6872727272727273 [2023-11-22 17:13:38,936 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1890 transitions. [2023-11-22 17:13:38,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1890 transitions. [2023-11-22 17:13:38,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:38,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1890 transitions. [2023-11-22 17:13:38,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.9090909090909) internal successors, (1890), 22 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:38,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 125.0) internal successors, (2875), 23 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:38,945 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 125.0) internal successors, (2875), 23 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:38,945 INFO L175 Difference]: Start difference. First operand has 124 places, 145 transitions, 495 flow. Second operand 22 states and 1890 transitions. [2023-11-22 17:13:38,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 199 transitions, 1047 flow [2023-11-22 17:13:38,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 199 transitions, 1043 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:38,949 INFO L231 Difference]: Finished difference. Result has 150 places, 199 transitions, 1041 flow [2023-11-22 17:13:38,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1041, PETRI_PLACES=150, PETRI_TRANSITIONS=199} [2023-11-22 17:13:38,950 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 34 predicate places. [2023-11-22 17:13:38,950 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 199 transitions, 1041 flow [2023-11-22 17:13:38,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.57142857142857) internal successors, (1128), 14 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:38,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:38,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:38,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:39,154 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:39,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1051456439, now seen corresponding path program 1 times [2023-11-22 17:13:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:39,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626202143] [2023-11-22 17:13:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:39,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:39,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:39,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:39,192 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 (12)] Waiting until timeout for monitored process [2023-11-22 17:13:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:39,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 17:13:39,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:39,292 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-22 17:13:39,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-22 17:13:39,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,310 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-22 17:13:39,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,317 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 17:13:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,329 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 17:13:39,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,345 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-22 17:13:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,352 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 17:13:39,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,377 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-22 17:13:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,394 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-22 17:13:39,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,410 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-22 17:13:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,426 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-22 17:13:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,442 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-22 17:13:39,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,452 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-22 17:13:39,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 17:13:39,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:39,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-22 17:13:39,491 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-22 17:13:39,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-22 17:13:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:39,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:39,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626202143] [2023-11-22 17:13:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626202143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:39,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:39,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:13:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215131713] [2023-11-22 17:13:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:39,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:13:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:13:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:13:39,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2023-11-22 17:13:39,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 199 transitions, 1041 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:39,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:39,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2023-11-22 17:13:39,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:40,236 INFO L124 PetriNetUnfolderBase]: 2339/4698 cut-off events. [2023-11-22 17:13:40,236 INFO L125 PetriNetUnfolderBase]: For 520/525 co-relation queries the response was YES. [2023-11-22 17:13:40,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8783 conditions, 4698 events. 2339/4698 cut-off events. For 520/525 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 33932 event pairs, 1029 based on Foata normal form. 75/3343 useless extension candidates. Maximal degree in co-relation 8755. Up to 3198 conditions per place. [2023-11-22 17:13:40,270 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 131 selfloop transitions, 1 changer transitions 0/197 dead transitions. [2023-11-22 17:13:40,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 197 transitions, 1301 flow [2023-11-22 17:13:40,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:13:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:13:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-22 17:13:40,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7546666666666667 [2023-11-22 17:13:40,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-22 17:13:40,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-22 17:13:40,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:40,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-22 17:13:40,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:40,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:40,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:40,274 INFO L175 Difference]: Start difference. First operand has 150 places, 199 transitions, 1041 flow. Second operand 3 states and 283 transitions. [2023-11-22 17:13:40,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 197 transitions, 1301 flow [2023-11-22 17:13:40,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 197 transitions, 1044 flow, removed 67 selfloop flow, removed 10 redundant places. [2023-11-22 17:13:40,280 INFO L231 Difference]: Finished difference. Result has 140 places, 197 transitions, 782 flow [2023-11-22 17:13:40,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=782, PETRI_PLACES=140, PETRI_TRANSITIONS=197} [2023-11-22 17:13:40,281 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 24 predicate places. [2023-11-22 17:13:40,281 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 197 transitions, 782 flow [2023-11-22 17:13:40,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:40,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:40,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:40,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:40,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:40,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:40,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1051456440, now seen corresponding path program 1 times [2023-11-22 17:13:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:40,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632676594] [2023-11-22 17:13:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:40,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:40,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:40,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:40,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-22 17:13:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:40,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-22 17:13:40,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:40,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-22 17:13:40,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-22 17:13:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,620 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,636 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,643 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:40,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,675 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 17:13:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 17:13:40,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-22 17:13:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:40,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-22 17:13:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:40,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:40,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:40,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632676594] [2023-11-22 17:13:40,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632676594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:40,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:40,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:13:40,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955208934] [2023-11-22 17:13:40,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:13:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:13:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:13:41,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2023-11-22 17:13:41,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 197 transitions, 782 flow. Second operand has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:41,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:41,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2023-11-22 17:13:41,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:41,682 INFO L124 PetriNetUnfolderBase]: 2339/4647 cut-off events. [2023-11-22 17:13:41,683 INFO L125 PetriNetUnfolderBase]: For 503/508 co-relation queries the response was YES. [2023-11-22 17:13:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8431 conditions, 4647 events. 2339/4647 cut-off events. For 503/508 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 33166 event pairs, 1029 based on Foata normal form. 75/3343 useless extension candidates. Maximal degree in co-relation 8404. Up to 3198 conditions per place. [2023-11-22 17:13:41,702 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 131 selfloop transitions, 1 changer transitions 0/195 dead transitions. [2023-11-22 17:13:41,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 195 transitions, 1042 flow [2023-11-22 17:13:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:13:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:13:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-22 17:13:41,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7546666666666667 [2023-11-22 17:13:41,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-22 17:13:41,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-22 17:13:41,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:41,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-22 17:13:41,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:41,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:41,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:41,706 INFO L175 Difference]: Start difference. First operand has 140 places, 197 transitions, 782 flow. Second operand 3 states and 283 transitions. [2023-11-22 17:13:41,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 195 transitions, 1042 flow [2023-11-22 17:13:41,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 195 transitions, 1041 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:41,711 INFO L231 Difference]: Finished difference. Result has 139 places, 195 transitions, 779 flow [2023-11-22 17:13:41,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=779, PETRI_PLACES=139, PETRI_TRANSITIONS=195} [2023-11-22 17:13:41,712 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 23 predicate places. [2023-11-22 17:13:41,712 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 195 transitions, 779 flow [2023-11-22 17:13:41,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:41,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:41,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:41,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-22 17:13:41,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:41,917 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:41,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1764564312, now seen corresponding path program 1 times [2023-11-22 17:13:41,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:41,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644163554] [2023-11-22 17:13:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:41,918 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 [2023-11-22 17:13:41,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:41,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:41,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-22 17:13:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:42,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 17:13:42,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:13:42,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:13:42,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:42,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644163554] [2023-11-22 17:13:42,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644163554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:13:42,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:13:42,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 17:13:42,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354010304] [2023-11-22 17:13:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:13:42,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:13:42,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:13:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:13:42,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 125 [2023-11-22 17:13:42,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 195 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:42,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:13:42,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 125 [2023-11-22 17:13:42,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:13:42,776 INFO L124 PetriNetUnfolderBase]: 3184/6415 cut-off events. [2023-11-22 17:13:42,776 INFO L125 PetriNetUnfolderBase]: For 628/633 co-relation queries the response was YES. [2023-11-22 17:13:42,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11539 conditions, 6415 events. 3184/6415 cut-off events. For 628/633 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 48877 event pairs, 965 based on Foata normal form. 0/4503 useless extension candidates. Maximal degree in co-relation 11511. Up to 1922 conditions per place. [2023-11-22 17:13:42,862 INFO L140 encePairwiseOnDemand]: 119/125 looper letters, 208 selfloop transitions, 15 changer transitions 0/285 dead transitions. [2023-11-22 17:13:42,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 285 transitions, 1507 flow [2023-11-22 17:13:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:13:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 17:13:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 510 transitions. [2023-11-22 17:13:42,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.816 [2023-11-22 17:13:42,867 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 510 transitions. [2023-11-22 17:13:42,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 510 transitions. [2023-11-22 17:13:42,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:13:42,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 510 transitions. [2023-11-22 17:13:42,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:42,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:42,873 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:42,873 INFO L175 Difference]: Start difference. First operand has 139 places, 195 transitions, 779 flow. Second operand 5 states and 510 transitions. [2023-11-22 17:13:42,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 285 transitions, 1507 flow [2023-11-22 17:13:42,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 285 transitions, 1506 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:13:42,879 INFO L231 Difference]: Finished difference. Result has 144 places, 196 transitions, 829 flow [2023-11-22 17:13:42,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=829, PETRI_PLACES=144, PETRI_TRANSITIONS=196} [2023-11-22 17:13:42,880 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 28 predicate places. [2023-11-22 17:13:42,881 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 196 transitions, 829 flow [2023-11-22 17:13:42,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:13:42,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:13:42,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:13:42,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-22 17:13:43,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:43,084 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:13:43,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:13:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash 78531978, now seen corresponding path program 1 times [2023-11-22 17:13:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:13:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106417205] [2023-11-22 17:13:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:13:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:13:43,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:13:43,086 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:13:43,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-22 17:13:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:13:43,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-22 17:13:43,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:13:43,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-22 17:13:43,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 17:13:43,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:13:43,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:43,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:43,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:13:43,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:43,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-22 17:13:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:43,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:43,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:13:43,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:13:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:13:43,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:43,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-22 17:13:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-22 17:13:43,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:13:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 17:13:43,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-22 17:13:43,733 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-22 17:13:43,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-22 17:13:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:13:43,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-22 17:13:43,808 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-22 17:13:43,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-22 17:13:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:13:43,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:13:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:13:44,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:13:44,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106417205] [2023-11-22 17:13:44,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106417205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:13:44,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:13:44,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-22 17:13:44,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951000300] [2023-11-22 17:13:44,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:13:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-22 17:13:44,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:13:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-22 17:13:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-22 17:13:47,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:13:52,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:13:56,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:13:59,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:14:04,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:14:08,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:14:12,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:14:15,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:14:18,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-22 17:14:18,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 125 [2023-11-22 17:14:18,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 196 transitions, 829 flow. Second operand has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:18,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:14:18,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 125 [2023-11-22 17:14:18,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:14:29,837 INFO L124 PetriNetUnfolderBase]: 23440/37731 cut-off events. [2023-11-22 17:14:29,837 INFO L125 PetriNetUnfolderBase]: For 5755/5769 co-relation queries the response was YES. [2023-11-22 17:14:30,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76125 conditions, 37731 events. 23440/37731 cut-off events. For 5755/5769 co-relation queries the response was YES. Maximal size of possible extension queue 2184. Compared 318257 event pairs, 14218 based on Foata normal form. 0/30680 useless extension candidates. Maximal degree in co-relation 76094. Up to 15378 conditions per place. [2023-11-22 17:14:30,189 INFO L140 encePairwiseOnDemand]: 106/125 looper letters, 235 selfloop transitions, 183 changer transitions 0/452 dead transitions. [2023-11-22 17:14:30,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 452 transitions, 2729 flow [2023-11-22 17:14:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 17:14:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 17:14:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 909 transitions. [2023-11-22 17:14:30,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4848 [2023-11-22 17:14:30,194 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 909 transitions. [2023-11-22 17:14:30,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 909 transitions. [2023-11-22 17:14:30,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:14:30,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 909 transitions. [2023-11-22 17:14:30,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.6) internal successors, (909), 15 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:30,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 125.0) internal successors, (2000), 16 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:30,199 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 125.0) internal successors, (2000), 16 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:30,199 INFO L175 Difference]: Start difference. First operand has 144 places, 196 transitions, 829 flow. Second operand 15 states and 909 transitions. [2023-11-22 17:14:30,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 452 transitions, 2729 flow [2023-11-22 17:14:30,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 452 transitions, 2706 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:14:30,215 INFO L231 Difference]: Finished difference. Result has 167 places, 316 transitions, 2173 flow [2023-11-22 17:14:30,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2173, PETRI_PLACES=167, PETRI_TRANSITIONS=316} [2023-11-22 17:14:30,216 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 51 predicate places. [2023-11-22 17:14:30,216 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 316 transitions, 2173 flow [2023-11-22 17:14:30,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:30,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:14:30,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:14:30,221 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 (15)] Ended with exit code 0 [2023-11-22 17:14:30,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:30,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:14:30,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:14:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1086502400, now seen corresponding path program 1 times [2023-11-22 17:14:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:14:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101138459] [2023-11-22 17:14:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:14:30,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:30,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:14:30,424 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:14:30,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-22 17:14:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:14:30,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 17:14:30,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:14:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:14:30,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:14:30,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:14:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101138459] [2023-11-22 17:14:30,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101138459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:14:30,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:14:30,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 17:14:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193001657] [2023-11-22 17:14:30,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:14:30,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:14:30,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:14:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:14:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:14:30,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 125 [2023-11-22 17:14:30,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 316 transitions, 2173 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:30,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:14:30,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 125 [2023-11-22 17:14:30,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:14:32,965 INFO L124 PetriNetUnfolderBase]: 8771/18406 cut-off events. [2023-11-22 17:14:32,965 INFO L125 PetriNetUnfolderBase]: For 4924/5319 co-relation queries the response was YES. [2023-11-22 17:14:33,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35388 conditions, 18406 events. 8771/18406 cut-off events. For 4924/5319 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 172094 event pairs, 3477 based on Foata normal form. 175/14415 useless extension candidates. Maximal degree in co-relation 35345. Up to 4879 conditions per place. [2023-11-22 17:14:33,079 INFO L140 encePairwiseOnDemand]: 119/125 looper letters, 280 selfloop transitions, 33 changer transitions 0/377 dead transitions. [2023-11-22 17:14:33,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 377 transitions, 2969 flow [2023-11-22 17:14:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:14:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 17:14:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 509 transitions. [2023-11-22 17:14:33,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8144 [2023-11-22 17:14:33,083 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 509 transitions. [2023-11-22 17:14:33,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 509 transitions. [2023-11-22 17:14:33,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:14:33,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 509 transitions. [2023-11-22 17:14:33,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:33,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:33,087 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:33,087 INFO L175 Difference]: Start difference. First operand has 167 places, 316 transitions, 2173 flow. Second operand 5 states and 509 transitions. [2023-11-22 17:14:33,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 377 transitions, 2969 flow [2023-11-22 17:14:33,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 377 transitions, 2969 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 17:14:33,116 INFO L231 Difference]: Finished difference. Result has 172 places, 316 transitions, 2244 flow [2023-11-22 17:14:33,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2244, PETRI_PLACES=172, PETRI_TRANSITIONS=316} [2023-11-22 17:14:33,117 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 56 predicate places. [2023-11-22 17:14:33,117 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 316 transitions, 2244 flow [2023-11-22 17:14:33,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:33,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:14:33,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:14:33,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-22 17:14:33,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:33,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:14:33,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:14:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1860475192, now seen corresponding path program 1 times [2023-11-22 17:14:33,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:14:33,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769419342] [2023-11-22 17:14:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:14:33,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:33,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:14:33,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:14:33,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-22 17:14:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:14:33,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 17:14:33,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:14:33,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-22 17:14:33,491 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-22 17:14:33,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-22 17:14:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 17:14:33,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:14:33,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:14:33,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769419342] [2023-11-22 17:14:33,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769419342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:14:33,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:14:33,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:14:33,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806021879] [2023-11-22 17:14:33,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:14:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:14:33,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:14:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:14:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:14:33,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 125 [2023-11-22 17:14:33,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 316 transitions, 2244 flow. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:33,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:14:33,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 125 [2023-11-22 17:14:33,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:14:35,623 INFO L124 PetriNetUnfolderBase]: 9744/19383 cut-off events. [2023-11-22 17:14:35,624 INFO L125 PetriNetUnfolderBase]: For 4609/4773 co-relation queries the response was YES. [2023-11-22 17:14:35,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38624 conditions, 19383 events. 9744/19383 cut-off events. For 4609/4773 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 176243 event pairs, 5699 based on Foata normal form. 0/15689 useless extension candidates. Maximal degree in co-relation 38578. Up to 13257 conditions per place. [2023-11-22 17:14:35,748 INFO L140 encePairwiseOnDemand]: 118/125 looper letters, 210 selfloop transitions, 44 changer transitions 0/312 dead transitions. [2023-11-22 17:14:35,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 312 transitions, 2744 flow [2023-11-22 17:14:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:14:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 17:14:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-11-22 17:14:35,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6528 [2023-11-22 17:14:35,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-11-22 17:14:35,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-11-22 17:14:35,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:14:35,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-11-22 17:14:35,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:35,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:35,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:35,753 INFO L175 Difference]: Start difference. First operand has 172 places, 316 transitions, 2244 flow. Second operand 5 states and 408 transitions. [2023-11-22 17:14:35,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 312 transitions, 2744 flow [2023-11-22 17:14:35,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 312 transitions, 2742 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:14:35,798 INFO L231 Difference]: Finished difference. Result has 171 places, 312 transitions, 2322 flow [2023-11-22 17:14:35,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=2234, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2322, PETRI_PLACES=171, PETRI_TRANSITIONS=312} [2023-11-22 17:14:35,799 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 55 predicate places. [2023-11-22 17:14:35,799 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 312 transitions, 2322 flow [2023-11-22 17:14:35,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:35,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:14:35,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:14:35,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-22 17:14:36,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:36,004 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:14:36,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:14:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1860475191, now seen corresponding path program 1 times [2023-11-22 17:14:36,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:14:36,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507629075] [2023-11-22 17:14:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:14:36,005 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 [2023-11-22 17:14:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:14:36,007 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:14:36,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-22 17:14:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:14:36,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 17:14:36,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:14:36,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-22 17:14:36,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:14:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:14:36,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-22 17:14:36,518 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-22 17:14:36,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-22 17:14:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:14:36,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:14:37,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:14:37,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 62 [2023-11-22 17:14:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:14:37,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:14:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507629075] [2023-11-22 17:14:37,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507629075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:14:37,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:14:37,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-22 17:14:37,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318887789] [2023-11-22 17:14:37,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:14:37,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-22 17:14:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:14:37,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-22 17:14:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-22 17:14:43,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 125 [2023-11-22 17:14:43,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 312 transitions, 2322 flow. Second operand has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:43,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:14:43,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 125 [2023-11-22 17:14:43,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:14:50,185 INFO L124 PetriNetUnfolderBase]: 17247/34136 cut-off events. [2023-11-22 17:14:50,186 INFO L125 PetriNetUnfolderBase]: For 7884/8192 co-relation queries the response was YES. [2023-11-22 17:14:50,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66426 conditions, 34136 events. 17247/34136 cut-off events. For 7884/8192 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 333893 event pairs, 8186 based on Foata normal form. 0/26917 useless extension candidates. Maximal degree in co-relation 66379. Up to 8255 conditions per place. [2023-11-22 17:14:50,413 INFO L140 encePairwiseOnDemand]: 110/125 looper letters, 221 selfloop transitions, 334 changer transitions 0/610 dead transitions. [2023-11-22 17:14:50,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 610 transitions, 5269 flow [2023-11-22 17:14:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 17:14:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-22 17:14:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1770 transitions. [2023-11-22 17:14:50,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6742857142857143 [2023-11-22 17:14:50,419 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1770 transitions. [2023-11-22 17:14:50,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1770 transitions. [2023-11-22 17:14:50,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:14:50,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1770 transitions. [2023-11-22 17:14:50,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 84.28571428571429) internal successors, (1770), 21 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:50,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 125.0) internal successors, (2750), 22 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:50,427 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 125.0) internal successors, (2750), 22 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:50,427 INFO L175 Difference]: Start difference. First operand has 171 places, 312 transitions, 2322 flow. Second operand 21 states and 1770 transitions. [2023-11-22 17:14:50,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 610 transitions, 5269 flow [2023-11-22 17:14:50,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 610 transitions, 5166 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 17:14:50,488 INFO L231 Difference]: Finished difference. Result has 193 places, 456 transitions, 4457 flow [2023-11-22 17:14:50,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4457, PETRI_PLACES=193, PETRI_TRANSITIONS=456} [2023-11-22 17:14:50,489 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 77 predicate places. [2023-11-22 17:14:50,489 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 456 transitions, 4457 flow [2023-11-22 17:14:50,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:50,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:14:50,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:14:50,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-22 17:14:50,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:50,693 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:14:50,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:14:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1562164009, now seen corresponding path program 1 times [2023-11-22 17:14:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:14:50,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580474825] [2023-11-22 17:14:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:14:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:14:50,695 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:14:50,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-22 17:14:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:14:50,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 17:14:50,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:14:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:14:50,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:14:50,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:14:50,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580474825] [2023-11-22 17:14:50,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580474825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:14:50,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:14:50,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:14:50,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404230788] [2023-11-22 17:14:50,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:14:50,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:14:50,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:14:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:14:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:14:50,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 125 [2023-11-22 17:14:50,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 456 transitions, 4457 flow. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:50,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:14:50,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 125 [2023-11-22 17:14:50,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:14:53,869 INFO L124 PetriNetUnfolderBase]: 14699/28154 cut-off events. [2023-11-22 17:14:53,869 INFO L125 PetriNetUnfolderBase]: For 15494/16878 co-relation queries the response was YES. [2023-11-22 17:14:54,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58525 conditions, 28154 events. 14699/28154 cut-off events. For 15494/16878 co-relation queries the response was YES. Maximal size of possible extension queue 1115. Compared 257887 event pairs, 9380 based on Foata normal form. 0/23526 useless extension candidates. Maximal degree in co-relation 58473. Up to 18455 conditions per place. [2023-11-22 17:14:54,089 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 520 selfloop transitions, 3 changer transitions 0/585 dead transitions. [2023-11-22 17:14:54,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 585 transitions, 6696 flow [2023-11-22 17:14:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:14:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:14:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 403 transitions. [2023-11-22 17:14:54,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.806 [2023-11-22 17:14:54,092 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 403 transitions. [2023-11-22 17:14:54,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 403 transitions. [2023-11-22 17:14:54,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:14:54,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 403 transitions. [2023-11-22 17:14:54,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:54,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:54,095 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:54,095 INFO L175 Difference]: Start difference. First operand has 193 places, 456 transitions, 4457 flow. Second operand 4 states and 403 transitions. [2023-11-22 17:14:54,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 585 transitions, 6696 flow [2023-11-22 17:14:54,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 585 transitions, 6557 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-22 17:14:54,148 INFO L231 Difference]: Finished difference. Result has 194 places, 456 transitions, 4348 flow [2023-11-22 17:14:54,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=4339, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4348, PETRI_PLACES=194, PETRI_TRANSITIONS=456} [2023-11-22 17:14:54,148 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 78 predicate places. [2023-11-22 17:14:54,148 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 456 transitions, 4348 flow [2023-11-22 17:14:54,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:14:54,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:14:54,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:14:54,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-22 17:14:54,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:54,352 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:14:54,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:14:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2089962760, now seen corresponding path program 1 times [2023-11-22 17:14:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:14:54,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137689318] [2023-11-22 17:14:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:14:54,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:14:54,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:14:54,354 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:14:54,354 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 (20)] Waiting until timeout for monitored process [2023-11-22 17:14:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:14:54,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 17:14:54,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:14:54,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-22 17:14:54,668 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-22 17:14:54,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-11-22 17:14:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:14:55,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:14:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:14:56,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:14:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137689318] [2023-11-22 17:14:56,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137689318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:14:56,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:14:56,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-22 17:14:56,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234869090] [2023-11-22 17:14:56,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:14:56,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 17:14:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:14:56,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 17:14:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-22 17:15:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 125 [2023-11-22 17:15:03,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 456 transitions, 4348 flow. Second operand has 18 states, 18 states have (on average 75.33333333333333) internal successors, (1356), 18 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:03,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:03,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 125 [2023-11-22 17:15:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:13,399 INFO L124 PetriNetUnfolderBase]: 28499/54012 cut-off events. [2023-11-22 17:15:13,399 INFO L125 PetriNetUnfolderBase]: For 25340/26111 co-relation queries the response was YES. [2023-11-22 17:15:13,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112224 conditions, 54012 events. 28499/54012 cut-off events. For 25340/26111 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 542421 event pairs, 10041 based on Foata normal form. 0/43916 useless extension candidates. Maximal degree in co-relation 112171. Up to 13270 conditions per place. [2023-11-22 17:15:13,941 INFO L140 encePairwiseOnDemand]: 110/125 looper letters, 221 selfloop transitions, 353 changer transitions 0/627 dead transitions. [2023-11-22 17:15:13,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 627 transitions, 6228 flow [2023-11-22 17:15:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 17:15:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-22 17:15:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1785 transitions. [2023-11-22 17:15:13,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2023-11-22 17:15:13,970 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1785 transitions. [2023-11-22 17:15:13,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1785 transitions. [2023-11-22 17:15:13,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:13,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1785 transitions. [2023-11-22 17:15:13,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.0) internal successors, (1785), 21 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:13,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 125.0) internal successors, (2750), 22 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:13,978 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 125.0) internal successors, (2750), 22 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:13,978 INFO L175 Difference]: Start difference. First operand has 194 places, 456 transitions, 4348 flow. Second operand 21 states and 1785 transitions. [2023-11-22 17:15:13,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 627 transitions, 6228 flow [2023-11-22 17:15:14,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 627 transitions, 6223 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:14,125 INFO L231 Difference]: Finished difference. Result has 220 places, 470 transitions, 5518 flow [2023-11-22 17:15:14,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5518, PETRI_PLACES=220, PETRI_TRANSITIONS=470} [2023-11-22 17:15:14,125 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 104 predicate places. [2023-11-22 17:15:14,125 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 470 transitions, 5518 flow [2023-11-22 17:15:14,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.33333333333333) internal successors, (1356), 18 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:14,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:14,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:14,130 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 [2023-11-22 17:15:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:15:14,329 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:15:14,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash -364335321, now seen corresponding path program 1 times [2023-11-22 17:15:14,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:15:14,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234447988] [2023-11-22 17:15:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:14,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:15:14,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:15:14,331 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:15:14,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-22 17:15:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:14,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 17:15:14,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:15:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:15:14,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:15:14,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-22 17:15:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:15:14,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:15:14,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234447988] [2023-11-22 17:15:14,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234447988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:15:14,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:15:14,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-22 17:15:14,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356157422] [2023-11-22 17:15:14,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:15:14,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 17:15:14,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:15:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 17:15:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-22 17:15:16,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 125 [2023-11-22 17:15:16,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 470 transitions, 5518 flow. Second operand has 10 states, 10 states have (on average 81.4) internal successors, (814), 10 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:16,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:16,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 125 [2023-11-22 17:15:16,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:24,251 INFO L124 PetriNetUnfolderBase]: 24035/47072 cut-off events. [2023-11-22 17:15:24,251 INFO L125 PetriNetUnfolderBase]: For 30565/33119 co-relation queries the response was YES. [2023-11-22 17:15:24,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100072 conditions, 47072 events. 24035/47072 cut-off events. For 30565/33119 co-relation queries the response was YES. Maximal size of possible extension queue 1852. Compared 475701 event pairs, 8872 based on Foata normal form. 8/39251 useless extension candidates. Maximal degree in co-relation 100011. Up to 14138 conditions per place. [2023-11-22 17:15:24,963 INFO L140 encePairwiseOnDemand]: 113/125 looper letters, 400 selfloop transitions, 111 changer transitions 0/575 dead transitions. [2023-11-22 17:15:24,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 575 transitions, 6932 flow [2023-11-22 17:15:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 17:15:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-22 17:15:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 864 transitions. [2023-11-22 17:15:24,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.768 [2023-11-22 17:15:24,966 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 864 transitions. [2023-11-22 17:15:24,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 864 transitions. [2023-11-22 17:15:24,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:24,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 864 transitions. [2023-11-22 17:15:24,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.0) internal successors, (864), 9 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:24,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 125.0) internal successors, (1250), 10 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:24,969 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 125.0) internal successors, (1250), 10 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:24,969 INFO L175 Difference]: Start difference. First operand has 220 places, 470 transitions, 5518 flow. Second operand 9 states and 864 transitions. [2023-11-22 17:15:24,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 575 transitions, 6932 flow [2023-11-22 17:15:25,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 575 transitions, 6748 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-22 17:15:25,131 INFO L231 Difference]: Finished difference. Result has 222 places, 473 transitions, 5625 flow [2023-11-22 17:15:25,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5625, PETRI_PLACES=222, PETRI_TRANSITIONS=473} [2023-11-22 17:15:25,132 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 106 predicate places. [2023-11-22 17:15:25,132 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 473 transitions, 5625 flow [2023-11-22 17:15:25,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.4) internal successors, (814), 10 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:25,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:25,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:25,137 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 (21)] Ended with exit code 0 [2023-11-22 17:15:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:15:25,337 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:15:25,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1745090318, now seen corresponding path program 1 times [2023-11-22 17:15:25,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:15:25,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38724880] [2023-11-22 17:15:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:25,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:15:25,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:15:25,338 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:15:25,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-22 17:15:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:25,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 17:15:25,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:15:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:15:25,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 17:15:25,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:15:25,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38724880] [2023-11-22 17:15:25,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38724880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:25,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:25,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 17:15:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382442975] [2023-11-22 17:15:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:25,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 17:15:25,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:15:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 17:15:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 17:15:25,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 125 [2023-11-22 17:15:25,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 473 transitions, 5625 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:25,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:25,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 125 [2023-11-22 17:15:25,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:33,539 INFO L124 PetriNetUnfolderBase]: 27825/56128 cut-off events. [2023-11-22 17:15:33,539 INFO L125 PetriNetUnfolderBase]: For 60701/65868 co-relation queries the response was YES. [2023-11-22 17:15:34,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121503 conditions, 56128 events. 27825/56128 cut-off events. For 60701/65868 co-relation queries the response was YES. Maximal size of possible extension queue 2173. Compared 594210 event pairs, 12159 based on Foata normal form. 261/48369 useless extension candidates. Maximal degree in co-relation 121438. Up to 20234 conditions per place. [2023-11-22 17:15:34,461 INFO L140 encePairwiseOnDemand]: 119/125 looper letters, 429 selfloop transitions, 45 changer transitions 0/541 dead transitions. [2023-11-22 17:15:34,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 541 transitions, 6868 flow [2023-11-22 17:15:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:15:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 17:15:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 505 transitions. [2023-11-22 17:15:34,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.808 [2023-11-22 17:15:34,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 505 transitions. [2023-11-22 17:15:34,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 505 transitions. [2023-11-22 17:15:34,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:34,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 505 transitions. [2023-11-22 17:15:34,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:34,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:34,468 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:34,468 INFO L175 Difference]: Start difference. First operand has 222 places, 473 transitions, 5625 flow. Second operand 5 states and 505 transitions. [2023-11-22 17:15:34,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 541 transitions, 6868 flow [2023-11-22 17:15:34,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 541 transitions, 6722 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-22 17:15:34,639 INFO L231 Difference]: Finished difference. Result has 224 places, 474 transitions, 5623 flow [2023-11-22 17:15:34,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5623, PETRI_PLACES=224, PETRI_TRANSITIONS=474} [2023-11-22 17:15:34,640 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 108 predicate places. [2023-11-22 17:15:34,640 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 474 transitions, 5623 flow [2023-11-22 17:15:34,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:34,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:34,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:34,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-22 17:15:34,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:15:34,844 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-22 17:15:34,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1137323983, now seen corresponding path program 1 times [2023-11-22 17:15:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 17:15:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223794543] [2023-11-22 17:15:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 17:15:34,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 17:15:34,848 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 17:15:34,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-22 17:15:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:34,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-22 17:15:34,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:15:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:15:35,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:15:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 17:15:35,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 17:15:35,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223794543] [2023-11-22 17:15:35,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223794543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:15:35,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 17:15:35,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-22 17:15:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420738849] [2023-11-22 17:15:35,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 17:15:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-22 17:15:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 17:15:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-22 17:15:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-22 17:15:36,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 125 [2023-11-22 17:15:36,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 474 transitions, 5623 flow. Second operand has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:15:36,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:36,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 125 [2023-11-22 17:15:36,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand