./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme --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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:04,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:04,802 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:51:04,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:04,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:04,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:04,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:04,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:04,841 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:04,842 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:04,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:04,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:04,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:04,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:04,849 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:04,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:04,850 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:04,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:04,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:04,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:04,852 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:51:04,853 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:51:04,853 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:51:04,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:04,854 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:51:04,854 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:51:04,855 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:04,855 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:04,856 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:04,856 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:04,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:04,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:04,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:04,858 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:04,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:04,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:04,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:04,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:04,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:04,859 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:04,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:04,860 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2023-11-26 11:51:05,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:05,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:05,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:05,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:05,222 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:05,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-26 11:51:08,419 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:08,636 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:08,637 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-26 11:51:08,647 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data/db7122129/609b720879a842fba9b5bf8dd82033be/FLAG2f0217d6f [2023-11-26 11:51:08,670 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data/db7122129/609b720879a842fba9b5bf8dd82033be [2023-11-26 11:51:08,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:08,680 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:08,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:08,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:08,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:08,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:08" (1/1) ... [2023-11-26 11:51:08,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69b922b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:08, skipping insertion in model container [2023-11-26 11:51:08,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:08" (1/1) ... [2023-11-26 11:51:08,725 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:08,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:08,961 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) [2023-11-26 11:51:08,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67a0a4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:08, skipping insertion in model container [2023-11-26 11:51:08,962 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:08,962 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 11:51:08,964 INFO L158 Benchmark]: Toolchain (without parser) took 283.92ms. Allocated memory is still 134.2MB. Free memory was 89.3MB in the beginning and 79.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 11:51:08,965 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:51:08,965 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.92ms. Allocated memory is still 134.2MB. Free memory was 89.3MB in the beginning and 79.4MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 11:51:08,967 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.92ms. Allocated memory is still 134.2MB. Free memory was 89.3MB in the beginning and 79.4MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme --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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:11,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:11,933 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 11:51:11,944 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:11,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:12,005 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:12,006 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:12,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:12,008 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:12,014 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:12,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:12,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:12,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:12,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:12,019 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:12,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:12,020 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:12,020 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:12,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:12,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:12,022 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:51:12,022 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:51:12,023 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:51:12,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:12,024 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:51:12,024 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 11:51:12,025 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 11:51:12,025 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:51:12,025 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:12,026 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:12,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:12,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:12,029 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:12,029 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:12,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:12,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:12,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:12,031 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 11:51:12,032 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 11:51:12,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:12,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:12,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:12,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:12,033 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 11:51:12,033 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2023-11-26 11:51:12,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:12,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:12,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:12,559 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:12,560 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:12,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-26 11:51:15,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:16,115 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:16,116 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-26 11:51:16,125 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data/9b94cac9a/ae434c5895394da5a152d450a1e2126b/FLAG38cec352a [2023-11-26 11:51:16,146 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/data/9b94cac9a/ae434c5895394da5a152d450a1e2126b [2023-11-26 11:51:16,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:16,150 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:16,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:16,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:16,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:16,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a470aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16, skipping insertion in model container [2023-11-26 11:51:16,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,188 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:16,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:16,416 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 11:51:16,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:16,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:16,456 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:51:16,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:16,511 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:51:16,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16 WrapperNode [2023-11-26 11:51:16,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:16,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:16,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:51:16,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:51:16,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,584 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 131 [2023-11-26 11:51:16,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:16,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:51:16,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:51:16,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:51:16,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,634 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,666 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 2, 2, 10]. 63 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-26 11:51:16,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,718 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:51:16,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:51:16,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:51:16,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:51:16,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (1/1) ... [2023-11-26 11:51:16,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:16,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:16,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:51:16,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:51:16,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:51:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 11:51:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 11:51:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-26 11:51:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-26 11:51:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:51:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-26 11:51:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-26 11:51:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-26 11:51:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-26 11:51:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:51:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:51:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:51:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:51:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:51:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:51:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:51:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:51:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-26 11:51:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-26 11:51:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-26 11:51:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-26 11:51:16,885 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:51:17,097 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:51:17,100 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:51:17,934 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:51:18,273 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:51:18,273 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:51:18,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:18 BoogieIcfgContainer [2023-11-26 11:51:18,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:51:18,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:51:18,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:51:18,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:51:18,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:51:16" (1/3) ... [2023-11-26 11:51:18,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cca858f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:18, skipping insertion in model container [2023-11-26 11:51:18,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:16" (2/3) ... [2023-11-26 11:51:18,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cca858f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:18, skipping insertion in model container [2023-11-26 11:51:18,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:18" (3/3) ... [2023-11-26 11:51:18,286 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-26 11:51:18,307 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:51:18,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-26 11:51:18,308 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:51:18,421 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:51:18,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 79 transitions, 172 flow [2023-11-26 11:51:18,539 INFO L124 PetriNetUnfolderBase]: 8/77 cut-off events. [2023-11-26 11:51:18,539 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:51:18,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 8/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 224 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-26 11:51:18,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 79 transitions, 172 flow [2023-11-26 11:51:18,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 76 transitions, 164 flow [2023-11-26 11:51:18,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:51:18,583 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;@1c9115d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:51:18,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-11-26 11:51:18,588 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:51:18,588 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:51:18,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:51:18,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:18,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:51:18,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:18,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash 594312, now seen corresponding path program 1 times [2023-11-26 11:51:18,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:18,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952793947] [2023-11-26 11:51:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:18,609 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 [2023-11-26 11:51:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:18,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:18,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:18,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:51:18,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:18,846 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 [2023-11-26 11:51:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:18,872 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 [2023-11-26 11:51:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:18,889 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 [2023-11-26 11:51:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:18,898 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 [2023-11-26 11:51:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:18,928 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 [2023-11-26 11:51:18,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:18,941 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 [2023-11-26 11:51:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:18,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:18,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952793947] [2023-11-26 11:51:18,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952793947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:18,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:18,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:51:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825109425] [2023-11-26 11:51:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:18,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:19,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:19,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:19,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-26 11:51:19,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:19,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:19,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-26 11:51:19,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:19,499 INFO L124 PetriNetUnfolderBase]: 233/609 cut-off events. [2023-11-26 11:51:19,500 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-26 11:51:19,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 609 events. 233/609 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3577 event pairs, 138 based on Foata normal form. 1/391 useless extension candidates. Maximal degree in co-relation 908. Up to 354 conditions per place. [2023-11-26 11:51:19,510 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 30 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-26 11:51:19,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 220 flow [2023-11-26 11:51:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-26 11:51:19,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6919831223628692 [2023-11-26 11:51:19,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-26 11:51:19,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-26 11:51:19,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:19,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-26 11:51:19,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:19,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:19,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:19,539 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 164 flow. Second operand 3 states and 164 transitions. [2023-11-26 11:51:19,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 220 flow [2023-11-26 11:51:19,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 212 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:51:19,548 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 152 flow [2023-11-26 11:51:19,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2023-11-26 11:51:19,554 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2023-11-26 11:51:19,554 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 152 flow [2023-11-26 11:51:19,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:19,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:19,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:51:19,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:19,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:19,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:19,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash 594313, now seen corresponding path program 1 times [2023-11-26 11:51:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:19,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789630360] [2023-11-26 11:51:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:19,760 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 [2023-11-26 11:51:19,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:19,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:19,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:19,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:51:19,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:19,861 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 [2023-11-26 11:51:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:19,876 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:51:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:19,891 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 13 treesize of output 1 [2023-11-26 11:51:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:19,900 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 [2023-11-26 11:51:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:19,926 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 [2023-11-26 11:51:19,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:19,939 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 [2023-11-26 11:51:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:20,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:20,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789630360] [2023-11-26 11:51:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789630360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:20,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:20,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952120695] [2023-11-26 11:51:20,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:20,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:20,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-26 11:51:20,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:20,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:20,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-26 11:51:20,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:20,829 INFO L124 PetriNetUnfolderBase]: 235/615 cut-off events. [2023-11-26 11:51:20,830 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-26 11:51:20,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 615 events. 235/615 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3594 event pairs, 138 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 960. Up to 363 conditions per place. [2023-11-26 11:51:20,839 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 33 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-11-26 11:51:20,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 78 transitions, 246 flow [2023-11-26 11:51:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:51:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2023-11-26 11:51:20,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6772151898734177 [2023-11-26 11:51:20,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 214 transitions. [2023-11-26 11:51:20,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 214 transitions. [2023-11-26 11:51:20,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:20,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 214 transitions. [2023-11-26 11:51:20,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:20,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:20,858 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:20,858 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 152 flow. Second operand 4 states and 214 transitions. [2023-11-26 11:51:20,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 78 transitions, 246 flow [2023-11-26 11:51:20,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:20,863 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 204 flow [2023-11-26 11:51:20,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2023-11-26 11:51:20,865 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2023-11-26 11:51:20,865 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 204 flow [2023-11-26 11:51:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:20,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:51:20,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:21,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:21,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:21,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash 18425884, now seen corresponding path program 1 times [2023-11-26 11:51:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516203642] [2023-11-26 11:51:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:21,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:21,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:21,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:21,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:21,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:51:21,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:21,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:21,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:21,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-26 11:51:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:21,260 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-26 11:51:21,261 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 [2023-11-26 11:51:21,318 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:51:21,319 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 [2023-11-26 11:51:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:21,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:21,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:21,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516203642] [2023-11-26 11:51:21,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516203642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:21,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:21,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:51:21,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063635646] [2023-11-26 11:51:21,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:21,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:21,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:21,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:21,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:21,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-26 11:51:21,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:21,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:21,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-26 11:51:21,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:21,772 INFO L124 PetriNetUnfolderBase]: 235/607 cut-off events. [2023-11-26 11:51:21,772 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 11:51:21,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 607 events. 235/607 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3494 event pairs, 138 based on Foata normal form. 50/447 useless extension candidates. Maximal degree in co-relation 963. Up to 365 conditions per place. [2023-11-26 11:51:21,779 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 37 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-11-26 11:51:21,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 276 flow [2023-11-26 11:51:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-26 11:51:21,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2023-11-26 11:51:21,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-26 11:51:21,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-26 11:51:21,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:21,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-26 11:51:21,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:21,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:21,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:21,785 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 204 flow. Second operand 3 states and 163 transitions. [2023-11-26 11:51:21,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 276 flow [2023-11-26 11:51:21,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:51:21,789 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 202 flow [2023-11-26 11:51:21,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2023-11-26 11:51:21,791 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2023-11-26 11:51:21,791 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 202 flow [2023-11-26 11:51:21,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:21,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:21,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:51:21,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:21,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:21,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:21,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash 18425885, now seen corresponding path program 1 times [2023-11-26 11:51:21,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:21,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812403405] [2023-11-26 11:51:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:21,996 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 [2023-11-26 11:51:21,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:21,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:21,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:22,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:51:22,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:22,171 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 [2023-11-26 11:51:22,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-26 11:51:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:22,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 11:51:22,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:22,270 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 [2023-11-26 11:51:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:22,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:22,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:22,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812403405] [2023-11-26 11:51:22,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812403405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:22,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:22,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540057752] [2023-11-26 11:51:22,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:22,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:22,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:22,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-26 11:51:22,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:22,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:22,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-26 11:51:22,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:22,907 INFO L124 PetriNetUnfolderBase]: 235/599 cut-off events. [2023-11-26 11:51:22,907 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 11:51:22,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 599 events. 235/599 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3410 event pairs, 138 based on Foata normal form. 50/447 useless extension candidates. Maximal degree in co-relation 990. Up to 365 conditions per place. [2023-11-26 11:51:22,913 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 37 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-11-26 11:51:22,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 274 flow [2023-11-26 11:51:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-26 11:51:22,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2023-11-26 11:51:22,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-26 11:51:22,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-26 11:51:22,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:22,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-26 11:51:22,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:22,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:22,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:22,918 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 202 flow. Second operand 3 states and 163 transitions. [2023-11-26 11:51:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 274 flow [2023-11-26 11:51:22,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:22,922 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 199 flow [2023-11-26 11:51:22,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2023-11-26 11:51:22,923 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2023-11-26 11:51:22,923 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 199 flow [2023-11-26 11:51:22,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:22,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:22,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-26 11:51:22,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:23,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:23,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:23,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash 571154428, now seen corresponding path program 1 times [2023-11-26 11:51:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:23,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596492222] [2023-11-26 11:51:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:23,134 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 [2023-11-26 11:51:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:23,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:23,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:23,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:51:23,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:23,226 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 [2023-11-26 11:51:23,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:23,239 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 [2023-11-26 11:51:23,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:23,255 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 [2023-11-26 11:51:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:23,279 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 [2023-11-26 11:51:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:23,291 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 [2023-11-26 11:51:23,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:23,305 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 [2023-11-26 11:51:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:23,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:24,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596492222] [2023-11-26 11:51:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596492222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:24,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:24,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:51:24,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767774510] [2023-11-26 11:51:24,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:24,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:51:24,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:51:24,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:26,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-26 11:51:26,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 199 flow. Second operand has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:26,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:26,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-26 11:51:26,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:28,789 INFO L124 PetriNetUnfolderBase]: 241/617 cut-off events. [2023-11-26 11:51:28,789 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 11:51:28,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 617 events. 241/617 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3500 event pairs, 138 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 1049. Up to 366 conditions per place. [2023-11-26 11:51:28,796 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 33 selfloop transitions, 25 changer transitions 0/92 dead transitions. [2023-11-26 11:51:28,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 92 transitions, 393 flow [2023-11-26 11:51:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:51:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:51:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 494 transitions. [2023-11-26 11:51:28,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253164556962025 [2023-11-26 11:51:28,801 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 494 transitions. [2023-11-26 11:51:28,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 494 transitions. [2023-11-26 11:51:28,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:28,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 494 transitions. [2023-11-26 11:51:28,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 49.4) internal successors, (494), 10 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,807 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,807 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 199 flow. Second operand 10 states and 494 transitions. [2023-11-26 11:51:28,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 92 transitions, 393 flow [2023-11-26 11:51:28,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 92 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:28,811 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 360 flow [2023-11-26 11:51:28,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=360, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2023-11-26 11:51:28,813 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2023-11-26 11:51:28,813 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 360 flow [2023-11-26 11:51:28,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:28,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:28,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:29,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:29,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:29,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:29,017 INFO L85 PathProgramCache]: Analyzing trace with hash -829683497, now seen corresponding path program 1 times [2023-11-26 11:51:29,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:29,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822885614] [2023-11-26 11:51:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:29,018 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 [2023-11-26 11:51:29,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:29,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:29,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:29,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:29,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:29,172 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-26 11:51:29,175 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 [2023-11-26 11:51:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:29,196 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-26 11:51:29,197 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 [2023-11-26 11:51:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:29,211 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-26 11:51:29,212 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 [2023-11-26 11:51:29,237 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:51:29,237 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 [2023-11-26 11:51:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:29,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:29,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:29,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822885614] [2023-11-26 11:51:29,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822885614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:29,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:29,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:51:29,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285722801] [2023-11-26 11:51:29,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:29,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:29,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:29,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:29,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 79 [2023-11-26 11:51:29,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:29,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 79 [2023-11-26 11:51:29,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:29,616 INFO L124 PetriNetUnfolderBase]: 259/657 cut-off events. [2023-11-26 11:51:29,616 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-26 11:51:29,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 657 events. 259/657 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3726 event pairs, 150 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 1160. Up to 415 conditions per place. [2023-11-26 11:51:29,624 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 57 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-11-26 11:51:29,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 472 flow [2023-11-26 11:51:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2023-11-26 11:51:29,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708860759493671 [2023-11-26 11:51:29,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 159 transitions. [2023-11-26 11:51:29,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 159 transitions. [2023-11-26 11:51:29,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:29,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 159 transitions. [2023-11-26 11:51:29,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,630 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 360 flow. Second operand 3 states and 159 transitions. [2023-11-26 11:51:29,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 472 flow [2023-11-26 11:51:29,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 90 transitions, 408 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-26 11:51:29,643 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 294 flow [2023-11-26 11:51:29,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2023-11-26 11:51:29,648 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2023-11-26 11:51:29,648 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 294 flow [2023-11-26 11:51:29,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:29,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:29,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:29,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:29,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:29,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -829683496, now seen corresponding path program 1 times [2023-11-26 11:51:29,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:29,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105561736] [2023-11-26 11:51:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:29,854 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 [2023-11-26 11:51:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:29,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:29,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:29,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:51:29,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:30,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:30,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-26 11:51:30,028 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 [2023-11-26 11:51:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:51:30,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:30,064 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 [2023-11-26 11:51:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:30,129 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 [2023-11-26 11:51:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:30,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:30,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:30,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105561736] [2023-11-26 11:51:30,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105561736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:30,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:30,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:30,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059581329] [2023-11-26 11:51:30,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:30,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-26 11:51:30,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:30,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-26 11:51:30,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:30,888 INFO L124 PetriNetUnfolderBase]: 241/613 cut-off events. [2023-11-26 11:51:30,889 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-26 11:51:30,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1069 conditions, 613 events. 241/613 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3476 event pairs, 138 based on Foata normal form. 13/427 useless extension candidates. Maximal degree in co-relation 1054. Up to 383 conditions per place. [2023-11-26 11:51:30,895 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 55 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-11-26 11:51:30,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 402 flow [2023-11-26 11:51:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-26 11:51:30,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2023-11-26 11:51:30,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-26 11:51:30,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-26 11:51:30,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:30,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-26 11:51:30,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,900 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 294 flow. Second operand 3 states and 163 transitions. [2023-11-26 11:51:30,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 402 flow [2023-11-26 11:51:30,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 88 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:30,904 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 291 flow [2023-11-26 11:51:30,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2023-11-26 11:51:30,905 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2023-11-26 11:51:30,905 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 291 flow [2023-11-26 11:51:30,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:30,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:30,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:31,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:31,108 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:31,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1538188443, now seen corresponding path program 1 times [2023-11-26 11:51:31,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:31,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519841574] [2023-11-26 11:51:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:31,109 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 [2023-11-26 11:51:31,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:31,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:31,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:31,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:51:31,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:31,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:31,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:31,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519841574] [2023-11-26 11:51:31,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519841574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:31,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:31,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:31,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663010049] [2023-11-26 11:51:31,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:31,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:51:31,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:31,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:51:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:31,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-26 11:51:31,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:31,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-26 11:51:31,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:31,847 INFO L124 PetriNetUnfolderBase]: 444/1088 cut-off events. [2023-11-26 11:51:31,848 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-26 11:51:31,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1912 conditions, 1088 events. 444/1088 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6997 event pairs, 234 based on Foata normal form. 0/747 useless extension candidates. Maximal degree in co-relation 1896. Up to 424 conditions per place. [2023-11-26 11:51:31,858 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 101 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2023-11-26 11:51:31,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 137 transitions, 648 flow [2023-11-26 11:51:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:51:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 294 transitions. [2023-11-26 11:51:31,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7443037974683544 [2023-11-26 11:51:31,860 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 294 transitions. [2023-11-26 11:51:31,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 294 transitions. [2023-11-26 11:51:31,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:31,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 294 transitions. [2023-11-26 11:51:31,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,864 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,864 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 291 flow. Second operand 5 states and 294 transitions. [2023-11-26 11:51:31,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 137 transitions, 648 flow [2023-11-26 11:51:31,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 137 transitions, 647 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:31,869 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 315 flow [2023-11-26 11:51:31,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2023-11-26 11:51:31,870 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2023-11-26 11:51:31,870 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 315 flow [2023-11-26 11:51:31,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:31,871 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-26 11:51:31,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:32,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:32,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:51:32,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1536108245, now seen corresponding path program 2 times [2023-11-26 11:51:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:51:32,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556790744] [2023-11-26 11:51:32,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:51:32,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:51:32,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:51:32,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:51:32,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:51:32,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:51:32,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:32,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:51:32,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:32,217 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 [2023-11-26 11:51:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:32,230 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 [2023-11-26 11:51:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:32,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:51:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:32,249 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 [2023-11-26 11:51:32,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:32,261 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 [2023-11-26 11:51:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:51:32,283 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 [2023-11-26 11:51:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:32,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:33,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:51:33,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556790744] [2023-11-26 11:51:33,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556790744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:33,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:33,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-26 11:51:33,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811012219] [2023-11-26 11:51:33,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:33,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:51:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:51:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:51:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:51:39,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-26 11:51:39,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 315 flow. Second operand has 14 states, 14 states have (on average 44.57142857142857) internal successors, (624), 14 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:39,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-26 11:51:39,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:43,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:51:45,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:51:48,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:51:52,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:51:56,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:51:59,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:52:01,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:52:03,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:52:04,756 INFO L124 PetriNetUnfolderBase]: 435/1162 cut-off events. [2023-11-26 11:52:04,756 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2023-11-26 11:52:04,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2194 conditions, 1162 events. 435/1162 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7926 event pairs, 255 based on Foata normal form. 16/831 useless extension candidates. Maximal degree in co-relation 2175. Up to 664 conditions per place. [2023-11-26 11:52:04,764 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 37 selfloop transitions, 60 changer transitions 0/127 dead transitions. [2023-11-26 11:52:04,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 127 transitions, 693 flow [2023-11-26 11:52:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:52:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 11:52:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1181 transitions. [2023-11-26 11:52:04,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5979746835443038 [2023-11-26 11:52:04,778 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1181 transitions. [2023-11-26 11:52:04,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1181 transitions. [2023-11-26 11:52:04,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:04,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1181 transitions. [2023-11-26 11:52:04,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 47.24) internal successors, (1181), 25 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:04,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 79.0) internal successors, (2054), 26 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:04,795 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 79.0) internal successors, (2054), 26 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:04,795 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 315 flow. Second operand 25 states and 1181 transitions. [2023-11-26 11:52:04,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 127 transitions, 693 flow [2023-11-26 11:52:04,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 127 transitions, 689 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:52:04,802 INFO L231 Difference]: Finished difference. Result has 113 places, 126 transitions, 661 flow [2023-11-26 11:52:04,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=661, PETRI_PLACES=113, PETRI_TRANSITIONS=126} [2023-11-26 11:52:04,803 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 38 predicate places. [2023-11-26 11:52:04,804 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 126 transitions, 661 flow [2023-11-26 11:52:04,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 44.57142857142857) internal successors, (624), 14 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:04,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:04,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:04,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:05,005 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-26 11:52:05,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash -824504114, now seen corresponding path program 1 times [2023-11-26 11:52:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:52:05,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865629203] [2023-11-26 11:52:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:05,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:52:05,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:52:05,007 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:52:05,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:52:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:05,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:52:05,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:05,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:05,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:52:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865629203] [2023-11-26 11:52:05,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865629203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:05,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:05,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:05,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113293854] [2023-11-26 11:52:05,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:05,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:05,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:52:05,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:05,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-26 11:52:05,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 126 transitions, 661 flow. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 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) [2023-11-26 11:52:05,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:05,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-26 11:52:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:05,842 INFO L124 PetriNetUnfolderBase]: 804/2029 cut-off events. [2023-11-26 11:52:05,843 INFO L125 PetriNetUnfolderBase]: For 412/412 co-relation queries the response was YES. [2023-11-26 11:52:05,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3920 conditions, 2029 events. 804/2029 cut-off events. For 412/412 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15211 event pairs, 426 based on Foata normal form. 16/1500 useless extension candidates. Maximal degree in co-relation 3893. Up to 758 conditions per place. [2023-11-26 11:52:05,908 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 114 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2023-11-26 11:52:05,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 162 transitions, 1012 flow [2023-11-26 11:52:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:52:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:52:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 291 transitions. [2023-11-26 11:52:05,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7367088607594937 [2023-11-26 11:52:05,910 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 291 transitions. [2023-11-26 11:52:05,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 291 transitions. [2023-11-26 11:52:05,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:05,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 291 transitions. [2023-11-26 11:52:05,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:05,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:05,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:05,914 INFO L175 Difference]: Start difference. First operand has 113 places, 126 transitions, 661 flow. Second operand 5 states and 291 transitions. [2023-11-26 11:52:05,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 162 transitions, 1012 flow [2023-11-26 11:52:05,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 844 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-11-26 11:52:05,925 INFO L231 Difference]: Finished difference. Result has 109 places, 130 transitions, 566 flow [2023-11-26 11:52:05,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=566, PETRI_PLACES=109, PETRI_TRANSITIONS=130} [2023-11-26 11:52:05,926 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 34 predicate places. [2023-11-26 11:52:05,926 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 130 transitions, 566 flow [2023-11-26 11:52:05,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 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) [2023-11-26 11:52:05,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:05,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:05,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26920860-cbac-456c-9ecc-53701efdf478/bin/uautomizer-verify-VRDe98Ueme/mathsat -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