./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c4f91361 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/chl-array-int-subst.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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 15:49:04,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 15:49:04,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 15:49:04,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 15:49:04,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 15:49:04,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 15:49:04,400 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 15:49:04,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 15:49:04,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 15:49:04,404 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 15:49:04,405 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 15:49:04,405 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 15:49:04,406 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 15:49:04,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 15:49:04,407 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 15:49:04,407 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 15:49:04,408 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 15:49:04,408 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 15:49:04,408 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 15:49:04,408 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 15:49:04,408 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 15:49:04,409 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 15:49:04,409 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 15:49:04,409 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 15:49:04,409 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 15:49:04,410 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 15:49:04,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 15:49:04,410 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 15:49:04,411 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 15:49:04,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 15:49:04,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:49:04,412 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 15:49:04,412 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 15:49:04,412 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 15:49:04,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 15:49:04,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 15:49:04,413 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 15:49:04,413 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 15:49:04,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 15:49:04,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-23 15:49:04,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 15:49:04,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 15:49:04,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 15:49:04,695 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 15:49:04,695 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 15:49:04,696 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-11-23 15:49:05,770 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 15:49:05,914 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 15:49:05,915 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-11-23 15:49:05,921 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88aec53e/544df8316e494323b3fcfc7f1698b0ab/FLAG3805a9a02 [2023-11-23 15:49:05,930 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88aec53e/544df8316e494323b3fcfc7f1698b0ab [2023-11-23 15:49:05,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 15:49:05,933 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 15:49:05,934 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 15:49:05,934 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 15:49:05,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 15:49:05,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:05" (1/1) ... [2023-11-23 15:49:05,939 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5a4ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:05, skipping insertion in model container [2023-11-23 15:49:05,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:05" (1/1) ... [2023-11-23 15:49:05,956 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:49:06,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:49:06,089 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) [2023-11-23 15:49:06,089 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@91a79d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:06, skipping insertion in model container [2023-11-23 15:49:06,089 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 15:49:06,090 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 15:49:06,091 INFO L158 Benchmark]: Toolchain (without parser) took 157.31ms. Allocated memory is still 134.2MB. 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. [2023-11-23 15:49:06,091 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 111.1MB. Free memory is still 83.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 15:49:06,092 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.80ms. Allocated memory is still 134.2MB. 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. [2023-11-23 15:49:06,093 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 111.1MB. Free memory is still 83.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.80ms. Allocated memory is still 134.2MB. 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: 118]: 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/chl-array-int-subst.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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 15:49:07,954 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 15:49:08,028 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-23 15:49:08,031 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 15:49:08,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 15:49:08,064 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 15:49:08,064 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 15:49:08,065 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 15:49:08,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 15:49:08,069 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 15:49:08,069 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 15:49:08,069 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 15:49:08,069 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 15:49:08,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 15:49:08,071 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 15:49:08,071 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 15:49:08,071 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 15:49:08,071 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 15:49:08,072 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 15:49:08,072 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 15:49:08,072 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 15:49:08,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 15:49:08,073 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 15:49:08,073 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 15:49:08,073 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 15:49:08,073 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 15:49:08,074 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 15:49:08,074 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 15:49:08,074 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 15:49:08,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 15:49:08,075 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 15:49:08,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 15:49:08,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:49:08,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 15:49:08,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 15:49:08,077 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-23 15:49:08,077 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 15:49:08,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 15:49:08,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 15:49:08,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 15:49:08,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 15:49:08,078 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-23 15:49:08,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-23 15:49:08,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 15:49:08,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 15:49:08,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 15:49:08,404 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 15:49:08,405 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 15:49:08,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-11-23 15:49:09,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 15:49:09,720 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 15:49:09,721 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-11-23 15:49:09,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ecdb1b5/e4a445ac8c0747dbb5e5a7c079dab442/FLAGd2c289a52 [2023-11-23 15:49:09,746 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ecdb1b5/e4a445ac8c0747dbb5e5a7c079dab442 [2023-11-23 15:49:09,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 15:49:09,749 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 15:49:09,751 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 15:49:09,752 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 15:49:09,755 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 15:49:09,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:09" (1/1) ... [2023-11-23 15:49:09,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393bf72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:09, skipping insertion in model container [2023-11-23 15:49:09,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:09" (1/1) ... [2023-11-23 15:49:09,781 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:49:09,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:49:09,979 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 15:49:09,985 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:49:10,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:49:10,022 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 15:49:10,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:49:10,068 INFO L206 MainTranslator]: Completed translation [2023-11-23 15:49:10,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10 WrapperNode [2023-11-23 15:49:10,069 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 15:49:10,070 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 15:49:10,070 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 15:49:10,070 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 15:49:10,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,124 INFO L138 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 285 [2023-11-23 15:49:10,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 15:49:10,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 15:49:10,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 15:49:10,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 15:49:10,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,143 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,181 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,184 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 15:49:10,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 15:49:10,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 15:49:10,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 15:49:10,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (1/1) ... [2023-11-23 15:49:10,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:49:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:49:10,209 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) [2023-11-23 15:49:10,229 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 [2023-11-23 15:49:10,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 15:49:10,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 15:49:10,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 15:49:10,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 15:49:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 15:49:10,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 15:49:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 15:49:10,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 15:49:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 15:49:10,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 15:49:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 15:49:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 15:49:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 15:49:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 15:49:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 15:49:10,255 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 15:49:10,345 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 15:49:10,362 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 15:49:11,018 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 15:49:11,274 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 15:49:11,274 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 15:49:11,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:49:11 BoogieIcfgContainer [2023-11-23 15:49:11,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 15:49:11,276 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 15:49:11,276 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 15:49:11,278 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 15:49:11,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:49:09" (1/3) ... [2023-11-23 15:49:11,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cca0b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:49:11, skipping insertion in model container [2023-11-23 15:49:11,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:10" (2/3) ... [2023-11-23 15:49:11,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cca0b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:49:11, skipping insertion in model container [2023-11-23 15:49:11,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:49:11" (3/3) ... [2023-11-23 15:49:11,282 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-11-23 15:49:11,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 15:49:11,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-23 15:49:11,296 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 15:49:11,369 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 15:49:11,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 107 transitions, 235 flow [2023-11-23 15:49:11,442 INFO L124 PetriNetUnfolderBase]: 9/104 cut-off events. [2023-11-23 15:49:11,442 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 15:49:11,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 9/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 324 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-11-23 15:49:11,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 107 transitions, 235 flow [2023-11-23 15:49:11,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 103 transitions, 224 flow [2023-11-23 15:49:11,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 15:49:11,470 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;@38d8f293, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 15:49:11,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-23 15:49:11,477 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 15:49:11,477 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-23 15:49:11,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 15:49:11,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:11,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 15:49:11,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:11,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash 881931, now seen corresponding path program 1 times [2023-11-23 15:49:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846780660] [2023-11-23 15:49:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:11,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 15:49:11,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:11,497 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) [2023-11-23 15:49:11,553 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 [2023-11-23 15:49:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:11,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 15:49:11,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:11,702 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 [2023-11-23 15:49:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,717 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 [2023-11-23 15:49:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,722 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 [2023-11-23 15:49:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,728 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 [2023-11-23 15:49:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,735 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 [2023-11-23 15:49:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,738 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 [2023-11-23 15:49:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,749 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 [2023-11-23 15:49:11,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,759 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 [2023-11-23 15:49:11,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,773 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 [2023-11-23 15:49:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,788 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 [2023-11-23 15:49:11,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,797 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 [2023-11-23 15:49:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,806 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 [2023-11-23 15:49:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,814 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 [2023-11-23 15:49:11,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,817 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 [2023-11-23 15:49:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,824 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 [2023-11-23 15:49:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,827 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 [2023-11-23 15:49:11,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,833 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 [2023-11-23 15:49:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,842 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 [2023-11-23 15:49:11,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,850 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 [2023-11-23 15:49:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,853 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 [2023-11-23 15:49:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,857 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 [2023-11-23 15:49:11,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,863 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 [2023-11-23 15:49:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,869 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 [2023-11-23 15:49:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:11,878 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 [2023-11-23 15:49:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:11,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:11,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:11,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846780660] [2023-11-23 15:49:11,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846780660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:11,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:11,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 15:49:11,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068491482] [2023-11-23 15:49:11,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:11,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:49:11,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:49:11,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:49:12,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-23 15:49:12,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:12,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:12,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-23 15:49:12,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:12,367 INFO L124 PetriNetUnfolderBase]: 977/2230 cut-off events. [2023-11-23 15:49:12,367 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-11-23 15:49:12,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 2230 events. 977/2230 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16486 event pairs, 608 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 3295. Up to 1318 conditions per place. [2023-11-23 15:49:12,413 INFO L140 encePairwiseOnDemand]: 101/107 looper letters, 36 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-11-23 15:49:12,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 98 transitions, 290 flow [2023-11-23 15:49:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:49:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:49:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-11-23 15:49:12,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7289719626168224 [2023-11-23 15:49:12,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-11-23 15:49:12,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-11-23 15:49:12,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:12,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-11-23 15:49:12,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:12,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:12,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:12,433 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 224 flow. Second operand 3 states and 234 transitions. [2023-11-23 15:49:12,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 98 transitions, 290 flow [2023-11-23 15:49:12,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 98 transitions, 278 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 15:49:12,439 INFO L231 Difference]: Finished difference. Result has 95 places, 98 transitions, 206 flow [2023-11-23 15:49:12,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=95, PETRI_TRANSITIONS=98} [2023-11-23 15:49:12,443 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -9 predicate places. [2023-11-23 15:49:12,443 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 98 transitions, 206 flow [2023-11-23 15:49:12,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:12,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:12,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 15:49:12,448 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 [2023-11-23 15:49:12,645 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 [2023-11-23 15:49:12,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:12,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash 881932, now seen corresponding path program 1 times [2023-11-23 15:49:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318219274] [2023-11-23 15:49:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:12,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 15:49:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:12,652 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) [2023-11-23 15:49:12,673 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 [2023-11-23 15:49:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:12,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 15:49:12,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:12,751 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 [2023-11-23 15:49:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,759 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 [2023-11-23 15:49:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,777 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 [2023-11-23 15:49:12,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,790 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 [2023-11-23 15:49:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,796 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 [2023-11-23 15:49:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,804 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 [2023-11-23 15:49:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,813 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 [2023-11-23 15:49:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,819 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 [2023-11-23 15:49:12,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,827 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 [2023-11-23 15:49:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,833 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 [2023-11-23 15:49:12,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,846 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 [2023-11-23 15:49:12,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,853 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 [2023-11-23 15:49:12,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,868 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 [2023-11-23 15:49:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,874 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 [2023-11-23 15:49:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,889 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 [2023-11-23 15:49:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,905 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 [2023-11-23 15:49:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,917 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 [2023-11-23 15:49:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,923 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 [2023-11-23 15:49:12,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,930 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 [2023-11-23 15:49:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,936 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 [2023-11-23 15:49:12,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,943 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 [2023-11-23 15:49:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,954 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 [2023-11-23 15:49:12,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,959 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 [2023-11-23 15:49:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:12,965 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 [2023-11-23 15:49:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:13,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:13,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318219274] [2023-11-23 15:49:13,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318219274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:13,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:13,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:49:13,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598503834] [2023-11-23 15:49:13,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:13,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:49:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:13,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:49:13,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:49:13,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-23 15:49:13,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 98 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:13,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:13,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-23 15:49:13,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:13,587 INFO L124 PetriNetUnfolderBase]: 980/2239 cut-off events. [2023-11-23 15:49:13,587 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-23 15:49:13,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3614 conditions, 2239 events. 980/2239 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16552 event pairs, 608 based on Foata normal form. 0/1484 useless extension candidates. Maximal degree in co-relation 3564. Up to 1331 conditions per place. [2023-11-23 15:49:13,600 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 40 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2023-11-23 15:49:13,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 107 transitions, 326 flow [2023-11-23 15:49:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:49:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:49:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2023-11-23 15:49:13,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7219626168224299 [2023-11-23 15:49:13,602 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 309 transitions. [2023-11-23 15:49:13,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 309 transitions. [2023-11-23 15:49:13,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:13,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 309 transitions. [2023-11-23 15:49:13,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:13,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:13,604 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:13,605 INFO L175 Difference]: Start difference. First operand has 95 places, 98 transitions, 206 flow. Second operand 4 states and 309 transitions. [2023-11-23 15:49:13,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 107 transitions, 326 flow [2023-11-23 15:49:13,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:49:13,606 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 284 flow [2023-11-23 15:49:13,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2023-11-23 15:49:13,607 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -5 predicate places. [2023-11-23 15:49:13,607 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 284 flow [2023-11-23 15:49:13,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:13,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:13,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-23 15:49:13,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-23 15:49:13,809 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 [2023-11-23 15:49:13,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:13,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:13,813 INFO L85 PathProgramCache]: Analyzing trace with hash 847565216, now seen corresponding path program 1 times [2023-11-23 15:49:13,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:13,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727320470] [2023-11-23 15:49:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:13,813 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 [2023-11-23 15:49:13,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:13,814 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) [2023-11-23 15:49:13,815 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 [2023-11-23 15:49:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:13,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 15:49:13,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:13,929 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 [2023-11-23 15:49:13,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:13,940 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 [2023-11-23 15:49:13,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:13,951 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 [2023-11-23 15:49:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:13,956 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 [2023-11-23 15:49:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:13,961 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 [2023-11-23 15:49:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:13,967 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 [2023-11-23 15:49:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:13,983 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 [2023-11-23 15:49:13,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:13,995 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 [2023-11-23 15:49:14,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,001 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 [2023-11-23 15:49:14,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,008 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 [2023-11-23 15:49:14,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,013 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 [2023-11-23 15:49:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,020 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 [2023-11-23 15:49:14,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,034 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 [2023-11-23 15:49:14,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,052 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 [2023-11-23 15:49:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,066 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 [2023-11-23 15:49:14,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,078 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 [2023-11-23 15:49:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,092 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 [2023-11-23 15:49:14,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,098 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 [2023-11-23 15:49:14,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,113 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 [2023-11-23 15:49:14,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,118 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 [2023-11-23 15:49:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,124 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 [2023-11-23 15:49:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,128 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 [2023-11-23 15:49:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,134 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 [2023-11-23 15:49:14,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:14,144 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 [2023-11-23 15:49:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:14,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:49:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:14,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727320470] [2023-11-23 15:49:14,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727320470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:49:14,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:49:14,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-23 15:49:14,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186280382] [2023-11-23 15:49:14,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:49:14,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:49:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:49:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:49:15,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-23 15:49:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 65.0) internal successors, (650), 10 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-23 15:49:15,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:17,459 INFO L124 PetriNetUnfolderBase]: 989/2266 cut-off events. [2023-11-23 15:49:17,459 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-23 15:49:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 2266 events. 989/2266 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16723 event pairs, 608 based on Foata normal form. 0/1511 useless extension candidates. Maximal degree in co-relation 3578. Up to 1334 conditions per place. [2023-11-23 15:49:17,472 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 40 selfloop transitions, 37 changer transitions 0/134 dead transitions. [2023-11-23 15:49:17,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 558 flow [2023-11-23 15:49:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:49:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 15:49:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 726 transitions. [2023-11-23 15:49:17,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2023-11-23 15:49:17,475 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 726 transitions. [2023-11-23 15:49:17,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 726 transitions. [2023-11-23 15:49:17,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:17,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 726 transitions. [2023-11-23 15:49:17,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.6) internal successors, (726), 10 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:17,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:17,481 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:17,482 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 284 flow. Second operand 10 states and 726 transitions. [2023-11-23 15:49:17,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 558 flow [2023-11-23 15:49:17,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 134 transitions, 558 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 15:49:17,488 INFO L231 Difference]: Finished difference. Result has 111 places, 134 transitions, 528 flow [2023-11-23 15:49:17,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=528, PETRI_PLACES=111, PETRI_TRANSITIONS=134} [2023-11-23 15:49:17,489 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2023-11-23 15:49:17,489 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 134 transitions, 528 flow [2023-11-23 15:49:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.0) internal successors, (650), 10 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:17,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:17,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:49:17,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-23 15:49:17,692 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 [2023-11-23 15:49:17,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:17,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash 847567260, now seen corresponding path program 1 times [2023-11-23 15:49:17,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:17,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10138366] [2023-11-23 15:49:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:17,694 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 [2023-11-23 15:49:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:17,695 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) [2023-11-23 15:49:17,696 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 (5)] Waiting until timeout for monitored process [2023-11-23 15:49:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:17,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 15:49:17,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:17,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,837 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 15:49:17,837 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 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-23 15:49:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,857 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 [2023-11-23 15:49:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,887 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:17,888 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 [2023-11-23 15:49:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,923 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-23 15:49:17,923 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 [2023-11-23 15:49:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,939 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 [2023-11-23 15:49:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,965 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:17,965 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 [2023-11-23 15:49:17,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:17,985 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 [2023-11-23 15:49:18,015 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 15:49:18,016 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 [2023-11-23 15:49:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:18,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:18,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:18,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10138366] [2023-11-23 15:49:18,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10138366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:18,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:18,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:49:18,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414600052] [2023-11-23 15:49:18,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:18,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:49:18,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:49:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:49:18,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-23 15:49:18,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 134 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:18,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:18,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-23 15:49:18,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:18,520 INFO L124 PetriNetUnfolderBase]: 989/2240 cut-off events. [2023-11-23 15:49:18,521 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-23 15:49:18,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 2240 events. 989/2240 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16364 event pairs, 608 based on Foata normal form. 126/1643 useless extension candidates. Maximal degree in co-relation 3680. Up to 1362 conditions per place. [2023-11-23 15:49:18,537 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/132 dead transitions. [2023-11-23 15:49:18,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 132 transitions, 672 flow [2023-11-23 15:49:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:49:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:49:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-23 15:49:18,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-23 15:49:18,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-23 15:49:18,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-23 15:49:18,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:18,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-23 15:49:18,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:18,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:18,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:18,541 INFO L175 Difference]: Start difference. First operand has 111 places, 134 transitions, 528 flow. Second operand 3 states and 235 transitions. [2023-11-23 15:49:18,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 132 transitions, 672 flow [2023-11-23 15:49:18,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 577 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-23 15:49:18,548 INFO L231 Difference]: Finished difference. Result has 107 places, 132 transitions, 431 flow [2023-11-23 15:49:18,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=431, PETRI_PLACES=107, PETRI_TRANSITIONS=132} [2023-11-23 15:49:18,549 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2023-11-23 15:49:18,549 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 132 transitions, 431 flow [2023-11-23 15:49:18,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:18,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:18,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:49:18,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-23 15:49:18,753 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 [2023-11-23 15:49:18,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:18,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:18,754 INFO L85 PathProgramCache]: Analyzing trace with hash 847567261, now seen corresponding path program 1 times [2023-11-23 15:49:18,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:18,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974204767] [2023-11-23 15:49:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:18,754 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 [2023-11-23 15:49:18,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:18,755 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) [2023-11-23 15:49:18,756 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 [2023-11-23 15:49:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:18,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 15:49:18,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,880 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 15 treesize of output 18 [2023-11-23 15:49:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,890 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 [2023-11-23 15:49:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,920 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 15:49:18,921 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 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-23 15:49:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,932 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 [2023-11-23 15:49:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,985 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 15:49:18,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-23 15:49:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:18,995 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 [2023-11-23 15:49:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,087 INFO L349 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2023-11-23 15:49:19,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-23 15:49:19,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-23 15:49:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,162 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 15:49:19,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-23 15:49:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,175 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 [2023-11-23 15:49:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,205 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 15 treesize of output 18 [2023-11-23 15:49:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,213 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 [2023-11-23 15:49:19,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,294 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 15:49:19,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2023-11-23 15:49:19,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,309 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 14 treesize of output 9 [2023-11-23 15:49:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,400 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 [2023-11-23 15:49:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:19,430 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 15:49:19,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-23 15:49:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:19,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:19,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:19,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974204767] [2023-11-23 15:49:19,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974204767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:19,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:19,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:49:19,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956173082] [2023-11-23 15:49:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:19,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:49:19,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:49:19,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:49:20,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 107 [2023-11-23 15:49:20,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 132 transitions, 431 flow. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:20,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:20,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 107 [2023-11-23 15:49:20,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:20,515 INFO L124 PetriNetUnfolderBase]: 989/2214 cut-off events. [2023-11-23 15:49:20,516 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-23 15:49:20,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 2214 events. 989/2214 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15963 event pairs, 608 based on Foata normal form. 126/1641 useless extension candidates. Maximal degree in co-relation 3685. Up to 1362 conditions per place. [2023-11-23 15:49:20,529 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/130 dead transitions. [2023-11-23 15:49:20,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 130 transitions, 575 flow [2023-11-23 15:49:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:49:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:49:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-11-23 15:49:20,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7133956386292835 [2023-11-23 15:49:20,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-11-23 15:49:20,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-11-23 15:49:20,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:20,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-11-23 15:49:20,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:20,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:20,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:20,546 INFO L175 Difference]: Start difference. First operand has 107 places, 132 transitions, 431 flow. Second operand 3 states and 229 transitions. [2023-11-23 15:49:20,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 130 transitions, 575 flow [2023-11-23 15:49:20,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 130 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:20,549 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 428 flow [2023-11-23 15:49:20,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2023-11-23 15:49:20,552 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-11-23 15:49:20,552 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 428 flow [2023-11-23 15:49:20,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:20,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:20,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:20,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-23 15:49:20,756 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 [2023-11-23 15:49:20,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:20,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:20,757 INFO L85 PathProgramCache]: Analyzing trace with hash -235543036, now seen corresponding path program 1 times [2023-11-23 15:49:20,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:20,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267279504] [2023-11-23 15:49:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:20,757 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 [2023-11-23 15:49:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:20,758 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) [2023-11-23 15:49:20,788 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 [2023-11-23 15:49:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:20,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 15:49:20,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:20,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,862 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 [2023-11-23 15:49:20,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,883 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 [2023-11-23 15:49:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,901 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 [2023-11-23 15:49:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,910 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 [2023-11-23 15:49:20,923 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:20,929 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,955 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 [2023-11-23 15:49:20,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:20,993 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 [2023-11-23 15:49:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,012 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 [2023-11-23 15:49:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:21,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:21,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:21,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267279504] [2023-11-23 15:49:21,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267279504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:21,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:21,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:49:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478290907] [2023-11-23 15:49:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:21,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:49:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:21,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:49:21,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:49:21,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-23 15:49:21,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:21,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:21,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-23 15:49:21,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:21,556 INFO L124 PetriNetUnfolderBase]: 989/2206 cut-off events. [2023-11-23 15:49:21,557 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-23 15:49:21,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 2206 events. 989/2206 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15819 event pairs, 608 based on Foata normal form. 25/1540 useless extension candidates. Maximal degree in co-relation 3677. Up to 1362 conditions per place. [2023-11-23 15:49:21,567 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-23 15:49:21,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 128 transitions, 572 flow [2023-11-23 15:49:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:49:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:49:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-23 15:49:21,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-23 15:49:21,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-23 15:49:21,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-23 15:49:21,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:21,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-23 15:49:21,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:21,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:21,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:21,571 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 428 flow. Second operand 3 states and 235 transitions. [2023-11-23 15:49:21,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 128 transitions, 572 flow [2023-11-23 15:49:21,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 128 transitions, 571 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:21,573 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 425 flow [2023-11-23 15:49:21,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2023-11-23 15:49:21,576 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-11-23 15:49:21,577 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 425 flow [2023-11-23 15:49:21,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:21,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:21,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:21,590 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 (7)] Ended with exit code 0 [2023-11-23 15:49:21,779 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 [2023-11-23 15:49:21,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:21,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash -235543037, now seen corresponding path program 1 times [2023-11-23 15:49:21,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:21,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980852083] [2023-11-23 15:49:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:21,781 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 [2023-11-23 15:49:21,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:21,782 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) [2023-11-23 15:49:21,784 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 [2023-11-23 15:49:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:21,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 15:49:21,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,892 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 15:49:21,893 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 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-23 15:49:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,912 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 [2023-11-23 15:49:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,946 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:21,946 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 [2023-11-23 15:49:21,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,963 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 [2023-11-23 15:49:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,984 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:21,984 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 [2023-11-23 15:49:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:21,997 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 [2023-11-23 15:49:22,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:22,017 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:22,018 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 [2023-11-23 15:49:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:22,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:22,030 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 [2023-11-23 15:49:22,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:22,047 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 [2023-11-23 15:49:22,071 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 15:49:22,071 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 [2023-11-23 15:49:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:22,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:22,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:22,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980852083] [2023-11-23 15:49:22,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980852083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:22,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:22,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:49:22,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465469689] [2023-11-23 15:49:22,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:22,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:49:22,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:49:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:49:22,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-23 15:49:22,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:22,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:22,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-23 15:49:22,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:22,490 INFO L124 PetriNetUnfolderBase]: 989/2198 cut-off events. [2023-11-23 15:49:22,491 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-23 15:49:22,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3684 conditions, 2198 events. 989/2198 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15703 event pairs, 608 based on Foata normal form. 25/1540 useless extension candidates. Maximal degree in co-relation 3669. Up to 1362 conditions per place. [2023-11-23 15:49:22,502 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/126 dead transitions. [2023-11-23 15:49:22,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 126 transitions, 569 flow [2023-11-23 15:49:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:49:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:49:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-23 15:49:22,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-23 15:49:22,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-23 15:49:22,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-23 15:49:22,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:22,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-23 15:49:22,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:22,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:22,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:22,511 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 425 flow. Second operand 3 states and 235 transitions. [2023-11-23 15:49:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 126 transitions, 569 flow [2023-11-23 15:49:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 126 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:22,514 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 422 flow [2023-11-23 15:49:22,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2023-11-23 15:49:22,515 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2023-11-23 15:49:22,515 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 422 flow [2023-11-23 15:49:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:22,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:22,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:22,536 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 [2023-11-23 15:49:22,721 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 [2023-11-23 15:49:22,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:22,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1288195623, now seen corresponding path program 1 times [2023-11-23 15:49:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:22,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35070183] [2023-11-23 15:49:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:22,722 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 [2023-11-23 15:49:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:22,723 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) [2023-11-23 15:49:22,724 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 [2023-11-23 15:49:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:22,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 15:49:22,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:22,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:22,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:22,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35070183] [2023-11-23 15:49:22,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35070183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:22,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:22,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 15:49:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989987818] [2023-11-23 15:49:22,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:22,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:49:22,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:49:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:49:22,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-23 15:49:22,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:22,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:22,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-23 15:49:22,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:23,445 INFO L124 PetriNetUnfolderBase]: 1848/3807 cut-off events. [2023-11-23 15:49:23,445 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-23 15:49:23,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6599 conditions, 3807 events. 1848/3807 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28364 event pairs, 797 based on Foata normal form. 0/2734 useless extension candidates. Maximal degree in co-relation 6583. Up to 1591 conditions per place. [2023-11-23 15:49:23,461 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 143 selfloop transitions, 4 changer transitions 0/198 dead transitions. [2023-11-23 15:49:23,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 198 transitions, 955 flow [2023-11-23 15:49:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:49:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:49:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-11-23 15:49:23,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7869158878504673 [2023-11-23 15:49:23,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-11-23 15:49:23,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-11-23 15:49:23,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:23,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-11-23 15:49:23,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:23,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:23,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:23,465 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 422 flow. Second operand 5 states and 421 transitions. [2023-11-23 15:49:23,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 198 transitions, 955 flow [2023-11-23 15:49:23,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 198 transitions, 954 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:23,468 INFO L231 Difference]: Finished difference. Result has 109 places, 127 transitions, 438 flow [2023-11-23 15:49:23,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=109, PETRI_TRANSITIONS=127} [2023-11-23 15:49:23,468 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 5 predicate places. [2023-11-23 15:49:23,469 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 127 transitions, 438 flow [2023-11-23 15:49:23,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:23,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:23,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:23,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-23 15:49:23,672 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 [2023-11-23 15:49:23,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:23,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash 914897484, now seen corresponding path program 1 times [2023-11-23 15:49:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:23,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397975296] [2023-11-23 15:49:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:23,673 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 [2023-11-23 15:49:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:23,674 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) [2023-11-23 15:49:23,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-23 15:49:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:23,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 15:49:23,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:23,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,785 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 15:49:23,785 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 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-23 15:49:23,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,796 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,796 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 [2023-11-23 15:49:23,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,804 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,804 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 [2023-11-23 15:49:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,822 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,822 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 [2023-11-23 15:49:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,828 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,829 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 [2023-11-23 15:49:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,835 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,835 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 [2023-11-23 15:49:23,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,851 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,851 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 [2023-11-23 15:49:23,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,870 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,870 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 [2023-11-23 15:49:23,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,876 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,876 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 [2023-11-23 15:49:23,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,918 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,918 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 [2023-11-23 15:49:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,935 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,935 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 [2023-11-23 15:49:23,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,954 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 15:49:23,955 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 [2023-11-23 15:49:23,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:23,971 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 [2023-11-23 15:49:23,996 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 15:49:23,996 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 [2023-11-23 15:49:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:24,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:24,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397975296] [2023-11-23 15:49:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397975296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:24,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:24,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:49:24,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506122896] [2023-11-23 15:49:24,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:49:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:24,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:49:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:49:24,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-23 15:49:24,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 127 transitions, 438 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:24,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:24,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-23 15:49:24,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:24,566 INFO L124 PetriNetUnfolderBase]: 1679/3857 cut-off events. [2023-11-23 15:49:24,566 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2023-11-23 15:49:24,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6606 conditions, 3857 events. 1679/3857 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31340 event pairs, 1091 based on Foata normal form. 53/2739 useless extension candidates. Maximal degree in co-relation 6587. Up to 2353 conditions per place. [2023-11-23 15:49:24,585 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 74 selfloop transitions, 1 changer transitions 0/125 dead transitions. [2023-11-23 15:49:24,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 125 transitions, 584 flow [2023-11-23 15:49:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:49:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:49:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-23 15:49:24,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-23 15:49:24,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-23 15:49:24,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-23 15:49:24,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:24,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-23 15:49:24,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:24,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:24,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:24,589 INFO L175 Difference]: Start difference. First operand has 109 places, 127 transitions, 438 flow. Second operand 3 states and 235 transitions. [2023-11-23 15:49:24,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 125 transitions, 584 flow [2023-11-23 15:49:24,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 580 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:24,591 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 432 flow [2023-11-23 15:49:24,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2023-11-23 15:49:24,592 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 4 predicate places. [2023-11-23 15:49:24,592 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 432 flow [2023-11-23 15:49:24,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:24,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:24,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:24,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-23 15:49:24,798 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 [2023-11-23 15:49:24,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:24,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -597365829, now seen corresponding path program 1 times [2023-11-23 15:49:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341601105] [2023-11-23 15:49:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:24,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 15:49:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:24,800 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) [2023-11-23 15:49:24,837 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 [2023-11-23 15:49:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:24,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 15:49:24,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:49:24,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:24,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341601105] [2023-11-23 15:49:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341601105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:24,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 15:49:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340431049] [2023-11-23 15:49:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:49:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:49:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:49:25,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-23 15:49:25,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 432 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:25,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:25,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-23 15:49:25,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:25,762 INFO L124 PetriNetUnfolderBase]: 3218/7502 cut-off events. [2023-11-23 15:49:25,762 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2023-11-23 15:49:25,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12782 conditions, 7502 events. 3218/7502 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 69479 event pairs, 2056 based on Foata normal form. 62/5352 useless extension candidates. Maximal degree in co-relation 12762. Up to 2576 conditions per place. [2023-11-23 15:49:25,795 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 125 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2023-11-23 15:49:25,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 872 flow [2023-11-23 15:49:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:49:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:49:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 418 transitions. [2023-11-23 15:49:25,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7813084112149533 [2023-11-23 15:49:25,798 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 418 transitions. [2023-11-23 15:49:25,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 418 transitions. [2023-11-23 15:49:25,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:25,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 418 transitions. [2023-11-23 15:49:25,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:25,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:25,801 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:25,801 INFO L175 Difference]: Start difference. First operand has 108 places, 125 transitions, 432 flow. Second operand 5 states and 418 transitions. [2023-11-23 15:49:25,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 872 flow [2023-11-23 15:49:25,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 183 transitions, 871 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:25,804 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 470 flow [2023-11-23 15:49:25,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=470, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2023-11-23 15:49:25,805 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 9 predicate places. [2023-11-23 15:49:25,805 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 470 flow [2023-11-23 15:49:25,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:25,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:25,806 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-23 15:49:25,824 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 [2023-11-23 15:49:26,009 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 [2023-11-23 15:49:26,009 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:26,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1807935836, now seen corresponding path program 2 times [2023-11-23 15:49:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5321392] [2023-11-23 15:49:26,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:49:26,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 15:49:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:26,025 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) [2023-11-23 15:49:26,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-23 15:49:26,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:49:26,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:49:26,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 15:49:26,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:26,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-23 15:49:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,144 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 [2023-11-23 15:49:26,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,156 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 [2023-11-23 15:49:26,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,162 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 [2023-11-23 15:49:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,175 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 [2023-11-23 15:49:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,181 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 [2023-11-23 15:49:26,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,187 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 13 treesize of output 1 [2023-11-23 15:49:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,191 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 [2023-11-23 15:49:26,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,197 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 [2023-11-23 15:49:26,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,200 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 [2023-11-23 15:49:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,210 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 [2023-11-23 15:49:26,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,215 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 13 treesize of output 1 [2023-11-23 15:49:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,220 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 [2023-11-23 15:49:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,225 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 [2023-11-23 15:49:26,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,230 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 [2023-11-23 15:49:26,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,234 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 [2023-11-23 15:49:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,244 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 [2023-11-23 15:49:26,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,249 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 [2023-11-23 15:49:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,255 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 [2023-11-23 15:49:26,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,259 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 [2023-11-23 15:49:26,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,263 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 8 treesize of output 1 [2023-11-23 15:49:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,268 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 [2023-11-23 15:49:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,278 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 [2023-11-23 15:49:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:26,283 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 [2023-11-23 15:49:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:26,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:49:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:26,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:26,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5321392] [2023-11-23 15:49:26,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5321392] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:49:26,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:49:26,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-23 15:49:26,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482148300] [2023-11-23 15:49:26,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:49:26,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 15:49:26,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:26,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 15:49:26,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-23 15:49:30,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-23 15:49:30,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 470 flow. Second operand has 14 states, 14 states have (on average 65.57142857142857) internal successors, (918), 14 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:30,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:30,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-23 15:49:30,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:38,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 15:49:39,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 15:49:41,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 15:49:44,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 15:49:45,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 15:49:50,777 INFO L124 PetriNetUnfolderBase]: 3091/7281 cut-off events. [2023-11-23 15:49:50,777 INFO L125 PetriNetUnfolderBase]: For 1971/1971 co-relation queries the response was YES. [2023-11-23 15:49:50,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12992 conditions, 7281 events. 3091/7281 cut-off events. For 1971/1971 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 67582 event pairs, 2057 based on Foata normal form. 42/5109 useless extension candidates. Maximal degree in co-relation 12970. Up to 4272 conditions per place. [2023-11-23 15:49:50,809 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 43 selfloop transitions, 91 changer transitions 0/181 dead transitions. [2023-11-23 15:49:50,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 181 transitions, 1014 flow [2023-11-23 15:49:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 15:49:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-23 15:49:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1557 transitions. [2023-11-23 15:49:50,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614273576890399 [2023-11-23 15:49:50,814 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1557 transitions. [2023-11-23 15:49:50,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1557 transitions. [2023-11-23 15:49:50,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:50,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1557 transitions. [2023-11-23 15:49:50,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.77272727272727) internal successors, (1557), 22 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:50,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 107.0) internal successors, (2461), 23 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:50,820 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 107.0) internal successors, (2461), 23 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:50,820 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 470 flow. Second operand 22 states and 1557 transitions. [2023-11-23 15:49:50,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 181 transitions, 1014 flow [2023-11-23 15:49:50,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 181 transitions, 1000 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:50,826 INFO L231 Difference]: Finished difference. Result has 139 places, 181 transitions, 1000 flow [2023-11-23 15:49:50,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1000, PETRI_PLACES=139, PETRI_TRANSITIONS=181} [2023-11-23 15:49:50,827 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 35 predicate places. [2023-11-23 15:49:50,827 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 181 transitions, 1000 flow [2023-11-23 15:49:50,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.57142857142857) internal successors, (918), 14 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:50,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:50,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:50,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-23 15:49:51,030 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 [2023-11-23 15:49:51,031 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:51,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash 914897485, now seen corresponding path program 1 times [2023-11-23 15:49:51,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:51,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003376651] [2023-11-23 15:49:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:51,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 15:49:51,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:51,033 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) [2023-11-23 15:49:51,068 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 [2023-11-23 15:49:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:51,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 15:49:51,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:51,147 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 [2023-11-23 15:49:51,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,162 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 [2023-11-23 15:49:51,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,169 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 [2023-11-23 15:49:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:51,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:51,190 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,202 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 [2023-11-23 15:49:51,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,209 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 [2023-11-23 15:49:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,217 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 [2023-11-23 15:49:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,224 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 [2023-11-23 15:49:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 15:49:51,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,245 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 [2023-11-23 15:49:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:51,267 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 [2023-11-23 15:49:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:51,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:51,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003376651] [2023-11-23 15:49:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003376651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:51,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:51,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:49:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510610747] [2023-11-23 15:49:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:51,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:49:51,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:51,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:49:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:49:51,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-23 15:49:51,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 181 transitions, 1000 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 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) [2023-11-23 15:49:51,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:51,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-23 15:49:51,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:52,226 INFO L124 PetriNetUnfolderBase]: 3091/7238 cut-off events. [2023-11-23 15:49:52,227 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-11-23 15:49:52,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13257 conditions, 7238 events. 3091/7238 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 66987 event pairs, 2057 based on Foata normal form. 101/5203 useless extension candidates. Maximal degree in co-relation 13228. Up to 4431 conditions per place. [2023-11-23 15:49:52,262 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 130 selfloop transitions, 1 changer transitions 0/179 dead transitions. [2023-11-23 15:49:52,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 179 transitions, 1258 flow [2023-11-23 15:49:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:49:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:49:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-23 15:49:52,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-23 15:49:52,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-23 15:49:52,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-23 15:49:52,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:52,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-23 15:49:52,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:52,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:52,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:52,265 INFO L175 Difference]: Start difference. First operand has 139 places, 181 transitions, 1000 flow. Second operand 3 states and 235 transitions. [2023-11-23 15:49:52,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 179 transitions, 1258 flow [2023-11-23 15:49:52,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 1001 flow, removed 67 selfloop flow, removed 10 redundant places. [2023-11-23 15:49:52,271 INFO L231 Difference]: Finished difference. Result has 129 places, 179 transitions, 741 flow [2023-11-23 15:49:52,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=741, PETRI_PLACES=129, PETRI_TRANSITIONS=179} [2023-11-23 15:49:52,272 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 25 predicate places. [2023-11-23 15:49:52,273 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 179 transitions, 741 flow [2023-11-23 15:49:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 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) [2023-11-23 15:49:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:52,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:52,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-23 15:49:52,476 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 [2023-11-23 15:49:52,477 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:52,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1702828452, now seen corresponding path program 1 times [2023-11-23 15:49:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:52,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509794804] [2023-11-23 15:49:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:52,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 15:49:52,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:52,479 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) [2023-11-23 15:49:52,511 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 [2023-11-23 15:49:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:52,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 15:49:52,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:49:52,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:52,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509794804] [2023-11-23 15:49:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509794804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:52,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:52,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 15:49:52,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143570515] [2023-11-23 15:49:52,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:52,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:49:52,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:49:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:49:52,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-23 15:49:52,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 179 transitions, 741 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:52,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:52,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-23 15:49:52,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:53,380 INFO L124 PetriNetUnfolderBase]: 2934/7150 cut-off events. [2023-11-23 15:49:53,381 INFO L125 PetriNetUnfolderBase]: For 1895/1895 co-relation queries the response was YES. [2023-11-23 15:49:53,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12684 conditions, 7150 events. 2934/7150 cut-off events. For 1895/1895 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 67468 event pairs, 1754 based on Foata normal form. 0/4994 useless extension candidates. Maximal degree in co-relation 12656. Up to 2827 conditions per place. [2023-11-23 15:49:53,411 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 229 selfloop transitions, 4 changer transitions 0/280 dead transitions. [2023-11-23 15:49:53,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 280 transitions, 1609 flow [2023-11-23 15:49:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:49:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:49:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2023-11-23 15:49:53,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7738317757009345 [2023-11-23 15:49:53,428 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2023-11-23 15:49:53,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2023-11-23 15:49:53,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:53,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2023-11-23 15:49:53,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:53,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:53,431 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:53,431 INFO L175 Difference]: Start difference. First operand has 129 places, 179 transitions, 741 flow. Second operand 5 states and 414 transitions. [2023-11-23 15:49:53,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 280 transitions, 1609 flow [2023-11-23 15:49:53,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 280 transitions, 1608 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:49:53,439 INFO L231 Difference]: Finished difference. Result has 134 places, 180 transitions, 757 flow [2023-11-23 15:49:53,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=757, PETRI_PLACES=134, PETRI_TRANSITIONS=180} [2023-11-23 15:49:53,440 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 30 predicate places. [2023-11-23 15:49:53,440 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 180 transitions, 757 flow [2023-11-23 15:49:53,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:53,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:53,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:53,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-23 15:49:53,643 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 [2023-11-23 15:49:53,644 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:53,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:53,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1143830126, now seen corresponding path program 1 times [2023-11-23 15:49:53,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:53,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525079106] [2023-11-23 15:49:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:53,645 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 [2023-11-23 15:49:53,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:53,646 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) [2023-11-23 15:49:53,670 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 [2023-11-23 15:49:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:53,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 15:49:53,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:53,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2023-11-23 15:49:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,838 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 [2023-11-23 15:49:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,846 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 [2023-11-23 15:49:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,850 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 [2023-11-23 15:49:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,858 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 [2023-11-23 15:49:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,862 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 [2023-11-23 15:49:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,873 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 [2023-11-23 15:49:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,877 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 [2023-11-23 15:49:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,881 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 [2023-11-23 15:49:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,884 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 [2023-11-23 15:49:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,887 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 [2023-11-23 15:49:53,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,891 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 [2023-11-23 15:49:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,896 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 [2023-11-23 15:49:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,912 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 [2023-11-23 15:49:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,915 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 [2023-11-23 15:49:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,918 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 [2023-11-23 15:49:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,923 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 [2023-11-23 15:49:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,925 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 [2023-11-23 15:49:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,930 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 [2023-11-23 15:49:53,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,938 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 [2023-11-23 15:49:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,943 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 [2023-11-23 15:49:53,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,945 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 [2023-11-23 15:49:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,949 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 [2023-11-23 15:49:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:53,951 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 [2023-11-23 15:49:53,987 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 15:49:53,988 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 [2023-11-23 15:49:54,008 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 15:49:54,008 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 [2023-11-23 15:49:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 15:49:54,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:49:54,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525079106] [2023-11-23 15:49:54,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525079106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:49:54,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:49:54,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:49:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899618721] [2023-11-23 15:49:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:49:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:49:54,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:49:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:49:54,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2023-11-23 15:49:54,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 180 transitions, 757 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:54,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:49:54,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2023-11-23 15:49:54,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:49:55,131 INFO L124 PetriNetUnfolderBase]: 3697/8657 cut-off events. [2023-11-23 15:49:55,131 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2023-11-23 15:49:55,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15722 conditions, 8657 events. 3697/8657 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 81606 event pairs, 2679 based on Foata normal form. 0/6303 useless extension candidates. Maximal degree in co-relation 15691. Up to 5151 conditions per place. [2023-11-23 15:49:55,176 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 113 selfloop transitions, 23 changer transitions 0/176 dead transitions. [2023-11-23 15:49:55,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1021 flow [2023-11-23 15:49:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:49:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:49:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 326 transitions. [2023-11-23 15:49:55,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6093457943925233 [2023-11-23 15:49:55,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 326 transitions. [2023-11-23 15:49:55,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 326 transitions. [2023-11-23 15:49:55,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:49:55,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 326 transitions. [2023-11-23 15:49:55,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:55,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:55,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:55,196 INFO L175 Difference]: Start difference. First operand has 134 places, 180 transitions, 757 flow. Second operand 5 states and 326 transitions. [2023-11-23 15:49:55,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1021 flow [2023-11-23 15:49:55,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 176 transitions, 1016 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:49:55,202 INFO L231 Difference]: Finished difference. Result has 132 places, 176 transitions, 790 flow [2023-11-23 15:49:55,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=790, PETRI_PLACES=132, PETRI_TRANSITIONS=176} [2023-11-23 15:49:55,203 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 28 predicate places. [2023-11-23 15:49:55,204 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 176 transitions, 790 flow [2023-11-23 15:49:55,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:49:55,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:49:55,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:49:55,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-23 15:49:55,421 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 [2023-11-23 15:49:55,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:49:55,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:49:55,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1143830125, now seen corresponding path program 1 times [2023-11-23 15:49:55,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:49:55,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578970815] [2023-11-23 15:49:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:49:55,423 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 [2023-11-23 15:49:55,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:49:55,424 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) [2023-11-23 15:49:55,429 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 [2023-11-23 15:49:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:49:55,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 15:49:55,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:49:55,692 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 [2023-11-23 15:49:55,698 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 7 [2023-11-23 15:49:55,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,720 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 [2023-11-23 15:49:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,729 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 [2023-11-23 15:49:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,739 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 [2023-11-23 15:49:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,750 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 [2023-11-23 15:49:55,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,762 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 [2023-11-23 15:49:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,772 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 [2023-11-23 15:49:55,776 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 [2023-11-23 15:49:55,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,782 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 [2023-11-23 15:49:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,789 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 [2023-11-23 15:49:55,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,801 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 [2023-11-23 15:49:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,808 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 [2023-11-23 15:49:55,811 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 [2023-11-23 15:49:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,817 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 [2023-11-23 15:49:55,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,825 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 [2023-11-23 15:49:55,829 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 [2023-11-23 15:49:55,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,834 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 [2023-11-23 15:49:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,841 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 [2023-11-23 15:49:55,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,921 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 [2023-11-23 15:49:55,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,928 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 [2023-11-23 15:49:55,932 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 [2023-11-23 15:49:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,948 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 [2023-11-23 15:49:55,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,955 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 [2023-11-23 15:49:55,959 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 [2023-11-23 15:49:55,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,965 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 [2023-11-23 15:49:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,971 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 [2023-11-23 15:49:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,982 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 [2023-11-23 15:49:55,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:55,994 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 [2023-11-23 15:49:55,998 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 [2023-11-23 15:49:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:56,005 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 [2023-11-23 15:49:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:56,086 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 [2023-11-23 15:49:56,099 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 15:49:56,100 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 [2023-11-23 15:49:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:49:56,156 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 [2023-11-23 15:49:56,167 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 15:49:56,167 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 [2023-11-23 15:49:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:49:56,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:49:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:49:57,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:49:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578970815] [2023-11-23 15:49:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578970815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:49:57,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:49:57,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-23 15:49:57,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038464586] [2023-11-23 15:49:57,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:49:57,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 15:49:57,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:49:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 15:49:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-23 15:50:00,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-23 15:50:03,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-23 15:50:05,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:07,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-23 15:50:09,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:12,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-23 15:50:15,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:18,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:23,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:27,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:31,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-23 15:50:33,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:38,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:41,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-23 15:50:42,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 107 [2023-11-23 15:50:42,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 176 transitions, 790 flow. Second operand has 14 states, 14 states have (on average 30.714285714285715) internal successors, (430), 14 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:50:42,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:50:42,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 107 [2023-11-23 15:50:42,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:50:45,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:47,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:50:50,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-23 15:50:53,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:51:01,830 INFO L124 PetriNetUnfolderBase]: 44588/69562 cut-off events. [2023-11-23 15:51:01,830 INFO L125 PetriNetUnfolderBase]: For 12131/12131 co-relation queries the response was YES. [2023-11-23 15:51:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141216 conditions, 69562 events. 44588/69562 cut-off events. For 12131/12131 co-relation queries the response was YES. Maximal size of possible extension queue 3057. Compared 586168 event pairs, 15525 based on Foata normal form. 0/53816 useless extension candidates. Maximal degree in co-relation 141185. Up to 12300 conditions per place. [2023-11-23 15:51:02,531 INFO L140 encePairwiseOnDemand]: 92/107 looper letters, 341 selfloop transitions, 199 changer transitions 0/560 dead transitions. [2023-11-23 15:51:02,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 560 transitions, 3182 flow [2023-11-23 15:51:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 15:51:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-23 15:51:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1068 transitions. [2023-11-23 15:51:02,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339699309223893 [2023-11-23 15:51:02,536 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1068 transitions. [2023-11-23 15:51:02,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1068 transitions. [2023-11-23 15:51:02,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:51:02,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1068 transitions. [2023-11-23 15:51:02,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 46.43478260869565) internal successors, (1068), 23 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:02,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:02,543 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:02,543 INFO L175 Difference]: Start difference. First operand has 132 places, 176 transitions, 790 flow. Second operand 23 states and 1068 transitions. [2023-11-23 15:51:02,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 560 transitions, 3182 flow [2023-11-23 15:51:02,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 560 transitions, 3125 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 15:51:02,579 INFO L231 Difference]: Finished difference. Result has 153 places, 293 transitions, 1805 flow [2023-11-23 15:51:02,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1805, PETRI_PLACES=153, PETRI_TRANSITIONS=293} [2023-11-23 15:51:02,579 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 49 predicate places. [2023-11-23 15:51:02,580 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 293 transitions, 1805 flow [2023-11-23 15:51:02,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.714285714285715) internal successors, (430), 14 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:02,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:51:02,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:51:02,584 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 [2023-11-23 15:51:02,784 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 [2023-11-23 15:51:02,784 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:51:02,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:51:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1098994627, now seen corresponding path program 1 times [2023-11-23 15:51:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:51:02,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735572247] [2023-11-23 15:51:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:51:02,785 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 [2023-11-23 15:51:02,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:51:02,786 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) [2023-11-23 15:51:02,790 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 [2023-11-23 15:51:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:51:02,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 15:51:02,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:51:02,969 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 [2023-11-23 15:51:02,987 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 15:51:02,987 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 [2023-11-23 15:51:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 15:51:03,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:51:03,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:51:03,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735572247] [2023-11-23 15:51:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735572247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:51:03,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:51:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:51:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357581564] [2023-11-23 15:51:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:51:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:51:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:51:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:51:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:51:03,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 107 [2023-11-23 15:51:03,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 293 transitions, 1805 flow. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:03,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:51:03,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 107 [2023-11-23 15:51:03,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:51:05,580 INFO L124 PetriNetUnfolderBase]: 11518/21744 cut-off events. [2023-11-23 15:51:05,580 INFO L125 PetriNetUnfolderBase]: For 9315/9315 co-relation queries the response was YES. [2023-11-23 15:51:05,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44496 conditions, 21744 events. 11518/21744 cut-off events. For 9315/9315 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 192719 event pairs, 8380 based on Foata normal form. 0/18698 useless extension candidates. Maximal degree in co-relation 44462. Up to 15939 conditions per place. [2023-11-23 15:51:05,809 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 198 selfloop transitions, 51 changer transitions 0/289 dead transitions. [2023-11-23 15:51:05,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 289 transitions, 2295 flow [2023-11-23 15:51:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:51:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:51:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 330 transitions. [2023-11-23 15:51:05,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616822429906542 [2023-11-23 15:51:05,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 330 transitions. [2023-11-23 15:51:05,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 330 transitions. [2023-11-23 15:51:05,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:51:05,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 330 transitions. [2023-11-23 15:51:05,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.0) internal successors, (330), 5 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) [2023-11-23 15:51:05,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:05,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:05,817 INFO L175 Difference]: Start difference. First operand has 153 places, 293 transitions, 1805 flow. Second operand 5 states and 330 transitions. [2023-11-23 15:51:05,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 289 transitions, 2295 flow [2023-11-23 15:51:05,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 289 transitions, 2222 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-23 15:51:05,844 INFO L231 Difference]: Finished difference. Result has 151 places, 289 transitions, 1826 flow [2023-11-23 15:51:05,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1826, PETRI_PLACES=151, PETRI_TRANSITIONS=289} [2023-11-23 15:51:05,846 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 47 predicate places. [2023-11-23 15:51:05,846 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 289 transitions, 1826 flow [2023-11-23 15:51:05,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:05,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:51:05,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:51:05,853 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 [2023-11-23 15:51:06,050 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 [2023-11-23 15:51:06,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:51:06,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:51:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -586780599, now seen corresponding path program 1 times [2023-11-23 15:51:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:51:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360779691] [2023-11-23 15:51:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:51:06,052 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 [2023-11-23 15:51:06,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:51:06,061 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) [2023-11-23 15:51:06,112 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 [2023-11-23 15:51:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:51:06,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 15:51:06,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:51:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:51:06,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:51:06,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:51:06,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360779691] [2023-11-23 15:51:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360779691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:51:06,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:51:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 15:51:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81284452] [2023-11-23 15:51:06,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:51:06,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:51:06,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:51:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:51:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:51:06,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-23 15:51:06,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 289 transitions, 1826 flow. Second operand has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:06,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:51:06,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-23 15:51:06,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:51:09,637 INFO L124 PetriNetUnfolderBase]: 14877/32723 cut-off events. [2023-11-23 15:51:09,637 INFO L125 PetriNetUnfolderBase]: For 12265/12417 co-relation queries the response was YES. [2023-11-23 15:51:09,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62314 conditions, 32723 events. 14877/32723 cut-off events. For 12265/12417 co-relation queries the response was YES. Maximal size of possible extension queue 1510. Compared 352846 event pairs, 9134 based on Foata normal form. 506/26289 useless extension candidates. Maximal degree in co-relation 62279. Up to 13139 conditions per place. [2023-11-23 15:51:09,977 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 270 selfloop transitions, 39 changer transitions 0/351 dead transitions. [2023-11-23 15:51:09,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 351 transitions, 2708 flow [2023-11-23 15:51:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:51:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:51:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2023-11-23 15:51:09,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7738317757009345 [2023-11-23 15:51:09,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2023-11-23 15:51:09,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2023-11-23 15:51:09,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:51:09,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2023-11-23 15:51:09,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:09,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:09,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:09,982 INFO L175 Difference]: Start difference. First operand has 151 places, 289 transitions, 1826 flow. Second operand 5 states and 414 transitions. [2023-11-23 15:51:09,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 351 transitions, 2708 flow [2023-11-23 15:51:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 351 transitions, 2625 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 15:51:10,012 INFO L231 Difference]: Finished difference. Result has 154 places, 291 transitions, 1844 flow [2023-11-23 15:51:10,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1844, PETRI_PLACES=154, PETRI_TRANSITIONS=291} [2023-11-23 15:51:10,013 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 50 predicate places. [2023-11-23 15:51:10,013 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 291 transitions, 1844 flow [2023-11-23 15:51:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:10,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:51:10,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:51:10,033 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 [2023-11-23 15:51:10,218 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 [2023-11-23 15:51:10,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:51:10,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:51:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1098994626, now seen corresponding path program 1 times [2023-11-23 15:51:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:51:10,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572143355] [2023-11-23 15:51:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:51:10,220 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 [2023-11-23 15:51:10,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:51:10,221 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) [2023-11-23 15:51:10,223 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 [2023-11-23 15:51:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:51:10,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 15:51:10,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:51:10,405 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 [2023-11-23 15:51:10,411 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 [2023-11-23 15:51:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:10,510 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 [2023-11-23 15:51:10,518 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 15:51:10,519 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 [2023-11-23 15:51:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:51:10,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:51:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:51:11,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:51:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572143355] [2023-11-23 15:51:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572143355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:51:11,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:51:11,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-23 15:51:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472707334] [2023-11-23 15:51:11,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:51:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 15:51:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:51:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 15:51:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:51:16,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 107 [2023-11-23 15:51:16,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 291 transitions, 1844 flow. Second operand has 12 states, 12 states have (on average 59.583333333333336) internal successors, (715), 12 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:16,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:51:16,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 107 [2023-11-23 15:51:16,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:51:28,166 INFO L124 PetriNetUnfolderBase]: 44072/81186 cut-off events. [2023-11-23 15:51:28,167 INFO L125 PetriNetUnfolderBase]: For 35533/35533 co-relation queries the response was YES. [2023-11-23 15:51:28,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170193 conditions, 81186 events. 44072/81186 cut-off events. For 35533/35533 co-relation queries the response was YES. Maximal size of possible extension queue 3141. Compared 835121 event pairs, 17907 based on Foata normal form. 0/68625 useless extension candidates. Maximal degree in co-relation 170157. Up to 17263 conditions per place. [2023-11-23 15:51:29,008 INFO L140 encePairwiseOnDemand]: 92/107 looper letters, 248 selfloop transitions, 349 changer transitions 0/634 dead transitions. [2023-11-23 15:51:29,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 634 transitions, 4832 flow [2023-11-23 15:51:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 15:51:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-23 15:51:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1601 transitions. [2023-11-23 15:51:29,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6505485574969525 [2023-11-23 15:51:29,027 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1601 transitions. [2023-11-23 15:51:29,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1601 transitions. [2023-11-23 15:51:29,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:51:29,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1601 transitions. [2023-11-23 15:51:29,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 69.6086956521739) internal successors, (1601), 23 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:29,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:29,038 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:29,038 INFO L175 Difference]: Start difference. First operand has 154 places, 291 transitions, 1844 flow. Second operand 23 states and 1601 transitions. [2023-11-23 15:51:29,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 634 transitions, 4832 flow [2023-11-23 15:51:29,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 634 transitions, 4792 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:51:29,277 INFO L231 Difference]: Finished difference. Result has 176 places, 450 transitions, 3682 flow [2023-11-23 15:51:29,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3682, PETRI_PLACES=176, PETRI_TRANSITIONS=450} [2023-11-23 15:51:29,278 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 72 predicate places. [2023-11-23 15:51:29,278 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 450 transitions, 3682 flow [2023-11-23 15:51:29,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.583333333333336) internal successors, (715), 12 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:29,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:51:29,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:51:29,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-23 15:51:29,501 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 [2023-11-23 15:51:29,501 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:51:29,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:51:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash -372421830, now seen corresponding path program 1 times [2023-11-23 15:51:29,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:51:29,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039331773] [2023-11-23 15:51:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:51:29,502 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 [2023-11-23 15:51:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:51:29,503 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) [2023-11-23 15:51:29,505 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 [2023-11-23 15:51:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:51:29,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 15:51:29,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:51:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:51:29,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:51:29,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:51:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039331773] [2023-11-23 15:51:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039331773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:51:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:51:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 15:51:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423607035] [2023-11-23 15:51:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:51:29,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:51:29,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:51:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:51:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:51:29,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-23 15:51:29,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 450 transitions, 3682 flow. Second operand has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:29,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:51:29,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-23 15:51:29,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:51:39,005 INFO L124 PetriNetUnfolderBase]: 41107/81892 cut-off events. [2023-11-23 15:51:39,005 INFO L125 PetriNetUnfolderBase]: For 52172/52932 co-relation queries the response was YES. [2023-11-23 15:51:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175538 conditions, 81892 events. 41107/81892 cut-off events. For 52172/52932 co-relation queries the response was YES. Maximal size of possible extension queue 3275. Compared 917857 event pairs, 29864 based on Foata normal form. 0/66837 useless extension candidates. Maximal degree in co-relation 175499. Up to 53899 conditions per place. [2023-11-23 15:51:39,923 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 511 selfloop transitions, 16 changer transitions 0/572 dead transitions. [2023-11-23 15:51:39,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 572 transitions, 5625 flow [2023-11-23 15:51:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:51:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:51:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 410 transitions. [2023-11-23 15:51:39,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7663551401869159 [2023-11-23 15:51:39,934 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 410 transitions. [2023-11-23 15:51:39,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 410 transitions. [2023-11-23 15:51:39,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:51:39,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 410 transitions. [2023-11-23 15:51:39,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:39,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:39,937 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:39,937 INFO L175 Difference]: Start difference. First operand has 176 places, 450 transitions, 3682 flow. Second operand 5 states and 410 transitions. [2023-11-23 15:51:39,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 572 transitions, 5625 flow [2023-11-23 15:51:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 572 transitions, 5609 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-23 15:51:40,142 INFO L231 Difference]: Finished difference. Result has 182 places, 451 transitions, 3707 flow [2023-11-23 15:51:40,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3707, PETRI_PLACES=182, PETRI_TRANSITIONS=451} [2023-11-23 15:51:40,142 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 78 predicate places. [2023-11-23 15:51:40,143 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 451 transitions, 3707 flow [2023-11-23 15:51:40,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:51:40,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:51:40,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:51:40,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-23 15:51:40,346 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 [2023-11-23 15:51:40,346 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 15:51:40,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:51:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1380269698, now seen corresponding path program 1 times [2023-11-23 15:51:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 15:51:40,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792447100] [2023-11-23 15:51:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:51:40,347 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 [2023-11-23 15:51:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-23 15:51:40,348 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) [2023-11-23 15:51:40,350 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 [2023-11-23 15:51:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:51:40,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 15:51:40,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:51:40,555 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 [2023-11-23 15:51:40,559 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 11 treesize of output 7 [2023-11-23 15:51:40,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,578 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 [2023-11-23 15:51:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,587 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 [2023-11-23 15:51:40,592 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 [2023-11-23 15:51:40,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,601 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 [2023-11-23 15:51:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,609 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 [2023-11-23 15:51:40,614 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 [2023-11-23 15:51:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,623 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 [2023-11-23 15:51:40,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,633 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 [2023-11-23 15:51:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,648 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 [2023-11-23 15:51:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,656 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 [2023-11-23 15:51:40,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,671 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 [2023-11-23 15:51:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,686 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 [2023-11-23 15:51:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,708 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 [2023-11-23 15:51:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,718 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 [2023-11-23 15:51:40,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,732 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 [2023-11-23 15:51:40,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,742 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 [2023-11-23 15:51:40,751 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 [2023-11-23 15:51:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,759 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 [2023-11-23 15:51:40,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,770 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 [2023-11-23 15:51:40,775 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 [2023-11-23 15:51:40,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,783 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 [2023-11-23 15:51:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,809 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 [2023-11-23 15:51:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,824 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 [2023-11-23 15:51:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,834 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 [2023-11-23 15:51:40,840 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 [2023-11-23 15:51:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,847 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 [2023-11-23 15:51:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,864 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 [2023-11-23 15:51:40,869 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 [2023-11-23 15:51:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:40,878 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 [2023-11-23 15:51:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:51:41,135 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 [2023-11-23 15:51:41,142 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 15:51:41,142 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 [2023-11-23 15:51:41,194 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 15:51:41,195 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 [2023-11-23 15:51:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:51:41,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:51:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:51:42,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 15:51:42,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792447100] [2023-11-23 15:51:42,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792447100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:51:42,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:51:42,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-23 15:51:42,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277214253] [2023-11-23 15:51:42,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 15:51:42,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 15:51:42,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 15:51:42,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 15:51:42,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-23 15:51:47,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:51:50,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:51:53,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:51:56,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:51:58,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:51:59,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:52:02,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:52:04,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:52:10,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:52:13,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:52:14,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2023-11-23 15:52:14,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 451 transitions, 3707 flow. Second operand has 19 states, 19 states have (on average 53.36842105263158) internal successors, (1014), 19 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:52:14,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:52:14,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2023-11-23 15:52:14,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:52:19,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 15:52:22,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]