./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.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_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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_898e5115-3dcd-427a-8fcb-6c1262089381/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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:57:00,706 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:57:00,842 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:57:00,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:57:00,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:57:00,919 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:57:00,921 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:57:00,922 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:57:00,923 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:57:00,929 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:57:00,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:57:00,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:57:00,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:57:00,934 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:57:00,935 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:57:00,935 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:57:00,936 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:57:00,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:57:00,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:57:00,937 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:57:00,938 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:57:00,938 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:57:00,939 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:57:00,939 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:57:00,940 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:57:00,940 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:57:00,941 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:57:00,941 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:57:00,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:57:00,943 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:57:00,944 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:57:00,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:57:00,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:00,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:57:00,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:57:00,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:57:00,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:57:00,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:57:00,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:57:00,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:57:00,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:57:00,948 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_898e5115-3dcd-427a-8fcb-6c1262089381/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2023-11-26 11:57:01,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:57:01,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:57:01,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:57:01,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:57:01,308 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:57:01,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-26 11:57:04,983 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:05,231 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:05,238 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-26 11:57:05,251 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data/efac58e43/6893be370c7f465c94a746a30a10f456/FLAGd1f55c9c0 [2023-11-26 11:57:05,266 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data/efac58e43/6893be370c7f465c94a746a30a10f456 [2023-11-26 11:57:05,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:05,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:05,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:05,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:05,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:05,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:05,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e8b4f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05, skipping insertion in model container [2023-11-26 11:57:05,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:05,312 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:05,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:05,530 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 11:57:05,531 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f76fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05, skipping insertion in model container [2023-11-26 11:57:05,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:05,532 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 11:57:05,534 INFO L158 Benchmark]: Toolchain (without parser) took 262.31ms. Allocated memory is still 151.0MB. Free memory was 105.3MB in the beginning and 95.2MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 11:57:05,535 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 102.8MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:57:05,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.63ms. Allocated memory is still 151.0MB. Free memory was 104.9MB in the beginning and 95.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 11:57:05,538 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 102.8MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.63ms. Allocated memory is still 151.0MB. Free memory was 104.9MB in the beginning and 95.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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_898e5115-3dcd-427a-8fcb-6c1262089381/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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:57:07,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:57:08,082 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 11:57:08,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:57:08,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:57:08,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:57:08,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:57:08,145 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:57:08,146 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:57:08,151 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:57:08,151 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:57:08,152 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:57:08,153 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:57:08,154 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:57:08,155 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:57:08,156 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:57:08,156 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:57:08,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:57:08,157 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:57:08,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:57:08,159 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:57:08,159 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:57:08,160 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:57:08,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:57:08,161 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:57:08,161 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 11:57:08,162 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 11:57:08,162 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:57:08,163 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:57:08,163 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:57:08,165 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:57:08,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:57:08,166 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:57:08,166 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:57:08,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:08,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:57:08,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:57:08,168 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 11:57:08,169 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 11:57:08,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:57:08,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:57:08,170 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:57:08,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:57:08,171 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 11:57:08,171 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_898e5115-3dcd-427a-8fcb-6c1262089381/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2023-11-26 11:57:08,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:57:08,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:57:08,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:57:08,660 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:57:08,660 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:57:08,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-26 11:57:11,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:12,134 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:12,135 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-26 11:57:12,148 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data/e4e1391f9/856c9bbfcd384da79e916446b0fe886e/FLAG3cbfe5eb9 [2023-11-26 11:57:12,164 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/data/e4e1391f9/856c9bbfcd384da79e916446b0fe886e [2023-11-26 11:57:12,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:12,168 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:12,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:12,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:12,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:12,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0cc8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12, skipping insertion in model container [2023-11-26 11:57:12,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,214 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:12,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:12,494 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 11:57:12,510 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:12,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:12,547 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:12,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:12,604 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:57:12,605 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:57:12,612 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:12,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12 WrapperNode [2023-11-26 11:57:12,612 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:12,614 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:12,614 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:12,614 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:12,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,687 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 196 [2023-11-26 11:57:12,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:12,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:12,689 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:12,689 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:12,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,723 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,743 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 8, 2, 2]. 57 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, 2, 1, 1]. [2023-11-26 11:57:12,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,778 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,781 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,804 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:12,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:12,806 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:12,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:12,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:12,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:12,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:12,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:12,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:57:12,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 11:57:12,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 11:57:12,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-26 11:57:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-26 11:57:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:57:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-26 11:57:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-26 11:57:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-26 11:57:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-26 11:57:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:57:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:57:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:57:12,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:57:12,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:57:12,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:57:12,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:57:12,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:12,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:57:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-26 11:57:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-26 11:57:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-26 11:57:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-26 11:57:12,918 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 11:57:13,072 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:13,074 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:13,801 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:14,270 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:14,270 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:57:14,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:14 BoogieIcfgContainer [2023-11-26 11:57:14,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:14,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:14,274 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:14,278 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:14,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:12" (1/3) ... [2023-11-26 11:57:14,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86356dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:14, skipping insertion in model container [2023-11-26 11:57:14,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (2/3) ... [2023-11-26 11:57:14,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86356dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:14, skipping insertion in model container [2023-11-26 11:57:14,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:14" (3/3) ... [2023-11-26 11:57:14,282 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-11-26 11:57:14,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:14,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-26 11:57:14,303 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:57:14,379 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:57:14,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 146 flow [2023-11-26 11:57:14,455 INFO L124 PetriNetUnfolderBase]: 5/64 cut-off events. [2023-11-26 11:57:14,455 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:57:14,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 5/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 173 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-11-26 11:57:14,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 146 flow [2023-11-26 11:57:14,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 63 transitions, 138 flow [2023-11-26 11:57:14,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:14,481 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;@5b79ccac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:14,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-26 11:57:14,486 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:57:14,486 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:57:14,486 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:57:14,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:14,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:57:14,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:14,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash 590919, now seen corresponding path program 1 times [2023-11-26 11:57:14,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:14,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014303489] [2023-11-26 11:57:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:14,508 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 11:57:14,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:14,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:14,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:57:14,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:14,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:57:14,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:14,732 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 11:57:14,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:14,745 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 11:57:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:14,753 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 11:57:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:14,796 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 11:57:14,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:14,810 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 11:57:14,819 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 11:57:14,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:14,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:14,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014303489] [2023-11-26 11:57:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014303489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:14,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:14,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:57:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708038474] [2023-11-26 11:57:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:14,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:14,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:14,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-26 11:57:14,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:14,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-26 11:57:14,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:15,299 INFO L124 PetriNetUnfolderBase]: 299/671 cut-off events. [2023-11-26 11:57:15,299 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-26 11:57:15,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 671 events. 299/671 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4120 event pairs, 171 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 1057. Up to 443 conditions per place. [2023-11-26 11:57:15,311 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-26 11:57:15,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 190 flow [2023-11-26 11:57:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-26 11:57:15,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2023-11-26 11:57:15,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-26 11:57:15,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-26 11:57:15,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:15,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-26 11:57:15,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:57:15,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:15,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:15,342 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2023-11-26 11:57:15,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 190 flow [2023-11-26 11:57:15,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:57:15,351 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 126 flow [2023-11-26 11:57:15,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-11-26 11:57:15,358 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-11-26 11:57:15,358 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 126 flow [2023-11-26 11:57:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:15,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:15,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:57:15,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:15,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:15,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 590920, now seen corresponding path program 1 times [2023-11-26 11:57:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:15,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923377767] [2023-11-26 11:57:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:57:15,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:15,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:15,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:15,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:57:15,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:15,730 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 11:57:15,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:15,751 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 11:57:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:15,775 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 11:57:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:15,785 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 11:57:15,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:15,822 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 11:57:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:15,844 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 11:57:15,947 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 11:57:15,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:15,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:15,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923377767] [2023-11-26 11:57:15,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923377767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:15,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192067660] [2023-11-26 11:57:15,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:15,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:16,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-26 11:57:16,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 11:57:16,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:16,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-26 11:57:16,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:16,694 INFO L124 PetriNetUnfolderBase]: 301/677 cut-off events. [2023-11-26 11:57:16,694 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-26 11:57:16,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 677 events. 301/677 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4147 event pairs, 171 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 1114. Up to 452 conditions per place. [2023-11-26 11:57:16,704 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 31 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2023-11-26 11:57:16,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 216 flow [2023-11-26 11:57:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2023-11-26 11:57:16,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2023-11-26 11:57:16,712 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 168 transitions. [2023-11-26 11:57:16,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 168 transitions. [2023-11-26 11:57:16,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:16,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 168 transitions. [2023-11-26 11:57:16,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 11:57:16,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:16,720 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:16,720 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 126 flow. Second operand 4 states and 168 transitions. [2023-11-26 11:57:16,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 216 flow [2023-11-26 11:57:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:57:16,726 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 178 flow [2023-11-26 11:57:16,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-11-26 11:57:16,727 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-11-26 11:57:16,728 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 178 flow [2023-11-26 11:57:16,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 11:57:16,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:16,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:57:16,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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)] Ended with exit code 0 [2023-11-26 11:57:16,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:16,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:16,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 18319253, now seen corresponding path program 1 times [2023-11-26 11:57:16,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:16,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34649160] [2023-11-26 11:57:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:16,934 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 11:57:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:16,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:16,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:57:17,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:17,032 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 11:57:17,049 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 11:57:17,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:17,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:17,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34649160] [2023-11-26 11:57:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34649160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:17,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:17,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26356703] [2023-11-26 11:57:17,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:17,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:17,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:17,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:17,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:17,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2023-11-26 11:57:17,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:17,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2023-11-26 11:57:17,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:17,542 INFO L124 PetriNetUnfolderBase]: 291/611 cut-off events. [2023-11-26 11:57:17,542 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 11:57:17,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 611 events. 291/611 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3442 event pairs, 171 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 1050. Up to 434 conditions per place. [2023-11-26 11:57:17,549 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 33 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-26 11:57:17,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 242 flow [2023-11-26 11:57:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-26 11:57:17,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2023-11-26 11:57:17,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-26 11:57:17,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-26 11:57:17,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:17,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-26 11:57:17,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 11:57:17,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,555 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,555 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 178 flow. Second operand 4 states and 146 transitions. [2023-11-26 11:57:17,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 242 flow [2023-11-26 11:57:17,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:57:17,559 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 176 flow [2023-11-26 11:57:17,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-11-26 11:57:17,560 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-26 11:57:17,560 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 176 flow [2023-11-26 11:57:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:57:17,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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)] Ended with exit code 0 [2023-11-26 11:57:17,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:17,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:17,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash 18319254, now seen corresponding path program 1 times [2023-11-26 11:57:17,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437350852] [2023-11-26 11:57:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:17,766 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 11:57:17,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:17,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:17,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:57:17,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:17,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-26 11:57:17,929 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 11:57:17,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:17,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:17,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437350852] [2023-11-26 11:57:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437350852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:17,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:17,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930570788] [2023-11-26 11:57:17,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:18,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2023-11-26 11:57:18,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 11:57:18,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:18,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2023-11-26 11:57:18,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:18,605 INFO L124 PetriNetUnfolderBase]: 275/607 cut-off events. [2023-11-26 11:57:18,605 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 11:57:18,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 607 events. 275/607 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3574 event pairs, 153 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 1016. Up to 403 conditions per place. [2023-11-26 11:57:18,611 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 31 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-26 11:57:18,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 244 flow [2023-11-26 11:57:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2023-11-26 11:57:18,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2023-11-26 11:57:18,613 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 162 transitions. [2023-11-26 11:57:18,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 162 transitions. [2023-11-26 11:57:18,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:18,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 162 transitions. [2023-11-26 11:57:18,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 11:57:18,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:18,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:18,616 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 176 flow. Second operand 4 states and 162 transitions. [2023-11-26 11:57:18,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 244 flow [2023-11-26 11:57:18,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:57:18,619 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 178 flow [2023-11-26 11:57:18,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-11-26 11:57:18,621 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-26 11:57:18,621 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 178 flow [2023-11-26 11:57:18,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 11:57:18,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:18,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:57:18,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:18,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:18,824 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:18,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:18,825 INFO L85 PathProgramCache]: Analyzing trace with hash 567897458, now seen corresponding path program 1 times [2023-11-26 11:57:18,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:18,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777369241] [2023-11-26 11:57:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:18,825 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 11:57:18,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:18,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:18,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:18,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:57:18,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:18,971 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 11:57:18,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:18,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777369241] [2023-11-26 11:57:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777369241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:18,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440477835] [2023-11-26 11:57:18,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:19,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2023-11-26 11:57:19,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 11:57:19,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:19,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2023-11-26 11:57:19,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:19,316 INFO L124 PetriNetUnfolderBase]: 274/606 cut-off events. [2023-11-26 11:57:19,316 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 11:57:19,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 606 events. 274/606 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3559 event pairs, 153 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1016. Up to 411 conditions per place. [2023-11-26 11:57:19,322 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 31 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-11-26 11:57:19,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 237 flow [2023-11-26 11:57:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2023-11-26 11:57:19,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2023-11-26 11:57:19,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2023-11-26 11:57:19,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2023-11-26 11:57:19,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:19,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2023-11-26 11:57:19,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:19,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:19,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:19,327 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 178 flow. Second operand 3 states and 134 transitions. [2023-11-26 11:57:19,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 237 flow [2023-11-26 11:57:19,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:57:19,330 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 170 flow [2023-11-26 11:57:19,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-26 11:57:19,331 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-26 11:57:19,331 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 170 flow [2023-11-26 11:57:19,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 11:57:19,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:19,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-26 11:57:19,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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)] Ended with exit code 0 [2023-11-26 11:57:19,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:19,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:19,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash 567893245, now seen corresponding path program 1 times [2023-11-26 11:57:19,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:19,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997172177] [2023-11-26 11:57:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:19,536 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 11:57:19,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:19,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:19,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:19,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:57:19,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:19,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-26 11:57:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:19,657 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 11:57:19,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:19,667 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 11:57:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:19,679 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 11:57:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:19,694 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 11:57:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:19,701 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 11:57:19,901 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 11:57:19,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:20,428 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 11:57:20,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:20,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997172177] [2023-11-26 11:57:20,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997172177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:20,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:57:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366573309] [2023-11-26 11:57:20,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:20,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:57:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:57:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:57:21,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-26 11:57:21,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 170 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:21,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-26 11:57:21,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:23,973 INFO L124 PetriNetUnfolderBase]: 280/624 cut-off events. [2023-11-26 11:57:23,973 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-26 11:57:23,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 624 events. 280/624 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3594 event pairs, 153 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1050. Up to 414 conditions per place. [2023-11-26 11:57:23,979 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 30 selfloop transitions, 24 changer transitions 0/77 dead transitions. [2023-11-26 11:57:23,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 368 flow [2023-11-26 11:57:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:57:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 380 transitions. [2023-11-26 11:57:23,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2023-11-26 11:57:23,983 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 380 transitions. [2023-11-26 11:57:23,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 380 transitions. [2023-11-26 11:57:23,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:23,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 380 transitions. [2023-11-26 11:57:23,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 11:57:23,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,987 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,987 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 170 flow. Second operand 10 states and 380 transitions. [2023-11-26 11:57:23,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 368 flow [2023-11-26 11:57:23,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:23,991 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 336 flow [2023-11-26 11:57:23,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=336, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-11-26 11:57:23,992 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-11-26 11:57:23,993 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 336 flow [2023-11-26 11:57:23,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:23,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:24,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:24,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:24,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:24,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash 288696349, now seen corresponding path program 1 times [2023-11-26 11:57:24,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:24,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338911335] [2023-11-26 11:57:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:24,197 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 11:57:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:24,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:24,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:24,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:57:24,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:24,370 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 11:57:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:24,425 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-26 11:57:24,425 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 11:57:24,488 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:57:24,488 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 11:57:24,562 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 11:57:24,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:24,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:24,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338911335] [2023-11-26 11:57:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338911335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:24,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:24,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:57:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901568369] [2023-11-26 11:57:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:24,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-26 11:57:24,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 11:57:24,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:24,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-26 11:57:24,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:24,911 INFO L124 PetriNetUnfolderBase]: 280/603 cut-off events. [2023-11-26 11:57:24,912 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-26 11:57:24,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 603 events. 280/603 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3372 event pairs, 153 based on Foata normal form. 55/441 useless extension candidates. Maximal degree in co-relation 1083. Up to 431 conditions per place. [2023-11-26 11:57:24,918 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 51 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-11-26 11:57:24,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 436 flow [2023-11-26 11:57:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-26 11:57:24,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2023-11-26 11:57:24,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-26 11:57:24,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-26 11:57:24,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:24,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-26 11:57:24,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 11:57:24,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:24,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:24,922 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 336 flow. Second operand 3 states and 127 transitions. [2023-11-26 11:57:24,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 436 flow [2023-11-26 11:57:24,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 375 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-26 11:57:24,931 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 273 flow [2023-11-26 11:57:24,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-11-26 11:57:24,932 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-11-26 11:57:24,932 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 273 flow [2023-11-26 11:57:24,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 11:57:24,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:24,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:24,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:25,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:25,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:25,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash 288696350, now seen corresponding path program 1 times [2023-11-26 11:57:25,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:25,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425188984] [2023-11-26 11:57:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:25,138 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 11:57:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:25,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:25,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:25,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:57:25,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:25,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-26 11:57:25,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:25,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:57:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:25,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:25,366 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 11:57:25,381 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 11:57:25,466 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:57:25,466 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 11:57:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:25,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:26,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:26,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425188984] [2023-11-26 11:57:26,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425188984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:26,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:26,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-26 11:57:26,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215305856] [2023-11-26 11:57:26,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:26,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:57:26,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:26,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:57:26,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:31,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-26 11:57:35,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-26 11:57:40,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-26 11:57:44,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-26 11:57:44,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2023-11-26 11:57:44,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 273 flow. Second operand has 11 states, 11 states have (on average 27.272727272727273) internal successors, (300), 11 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 11:57:44,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:44,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2023-11-26 11:57:44,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:45,836 INFO L124 PetriNetUnfolderBase]: 1052/1812 cut-off events. [2023-11-26 11:57:45,836 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-26 11:57:45,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3435 conditions, 1812 events. 1052/1812 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 11239 event pairs, 608 based on Foata normal form. 0/1202 useless extension candidates. Maximal degree in co-relation 3422. Up to 757 conditions per place. [2023-11-26 11:57:45,853 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 71 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2023-11-26 11:57:45,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 493 flow [2023-11-26 11:57:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:57:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 336 transitions. [2023-11-26 11:57:45,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2023-11-26 11:57:45,857 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 336 transitions. [2023-11-26 11:57:45,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 336 transitions. [2023-11-26 11:57:45,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:45,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 336 transitions. [2023-11-26 11:57:45,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 33.6) internal successors, (336), 10 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 11:57:45,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:45,861 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:45,861 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 273 flow. Second operand 10 states and 336 transitions. [2023-11-26 11:57:45,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 493 flow [2023-11-26 11:57:45,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:45,866 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 294 flow [2023-11-26 11:57:45,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-11-26 11:57:45,870 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-11-26 11:57:45,870 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 294 flow [2023-11-26 11:57:45,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.272727272727273) internal successors, (300), 11 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 11:57:45,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:45,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:45,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:46,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:46,077 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:46,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997594, now seen corresponding path program 1 times [2023-11-26 11:57:46,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:46,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31559644] [2023-11-26 11:57:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:46,078 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 11:57:46,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:46,079 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:46,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:46,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:57:46,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:46,278 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-26 11:57:46,278 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 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-26 11:57:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:46,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:46,316 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-26 11:57:46,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-26 11:57:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:46,330 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-26 11:57:46,331 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 11:57:46,356 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:57:46,356 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 11:57:46,388 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 11:57:46,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:46,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31559644] [2023-11-26 11:57:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31559644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:46,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:46,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:57:46,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171233993] [2023-11-26 11:57:46,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:46,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:46,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:46,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:46,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:46,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-26 11:57:46,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:46,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:46,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-26 11:57:46,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:46,758 INFO L124 PetriNetUnfolderBase]: 592/1180 cut-off events. [2023-11-26 11:57:46,759 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-26 11:57:46,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2192 conditions, 1180 events. 592/1180 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7375 event pairs, 332 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2178. Up to 904 conditions per place. [2023-11-26 11:57:46,795 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 53 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-26 11:57:46,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 398 flow [2023-11-26 11:57:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-26 11:57:46,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2023-11-26 11:57:46,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-26 11:57:46,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-26 11:57:46,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:46,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-26 11:57:46,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 11:57:46,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:46,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:57:46,800 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 294 flow. Second operand 3 states and 123 transitions. [2023-11-26 11:57:46,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 398 flow [2023-11-26 11:57:46,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 371 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-26 11:57:46,804 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 265 flow [2023-11-26 11:57:46,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-11-26 11:57:46,805 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-11-26 11:57:46,805 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 265 flow [2023-11-26 11:57:46,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:46,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:46,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:46,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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)] Ended with exit code 0 [2023-11-26 11:57:47,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:47,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:47,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997595, now seen corresponding path program 1 times [2023-11-26 11:57:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:47,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452724578] [2023-11-26 11:57:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:47,012 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 11:57:47,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:47,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:47,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:47,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:57:47,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:47,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-26 11:57:47,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-26 11:57:47,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:47,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:47,239 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 11:57:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:47,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:57:47,301 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:57:47,301 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 11:57:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:47,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:48,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452724578] [2023-11-26 11:57:48,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452724578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:48,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:48,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-26 11:57:48,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914622920] [2023-11-26 11:57:48,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:48,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:57:48,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:57:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:49,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-26 11:57:49,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 11:57:49,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:49,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-26 11:57:49,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:50,409 INFO L124 PetriNetUnfolderBase]: 592/1162 cut-off events. [2023-11-26 11:57:50,410 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-26 11:57:50,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 1162 events. 592/1162 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7173 event pairs, 332 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 2144. Up to 447 conditions per place. [2023-11-26 11:57:50,419 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 65 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2023-11-26 11:57:50,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 469 flow [2023-11-26 11:57:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:57:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 370 transitions. [2023-11-26 11:57:50,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-26 11:57:50,423 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 370 transitions. [2023-11-26 11:57:50,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 370 transitions. [2023-11-26 11:57:50,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:50,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 370 transitions. [2023-11-26 11:57:50,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 11:57:50,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:50,428 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:50,428 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 265 flow. Second operand 10 states and 370 transitions. [2023-11-26 11:57:50,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 469 flow [2023-11-26 11:57:50,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:50,432 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 286 flow [2023-11-26 11:57:50,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-11-26 11:57:50,433 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-11-26 11:57:50,433 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 286 flow [2023-11-26 11:57:50,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 11:57:50,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:50,434 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-26 11:57:50,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 [2023-11-26 11:57:50,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:50,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-26 11:57:50,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1110995044, now seen corresponding path program 2 times [2023-11-26 11:57:50,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:57:50,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751026747] [2023-11-26 11:57:50,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:50,639 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 11:57:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:57:50,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 11:57:50,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_898e5115-3dcd-427a-8fcb-6c1262089381/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 (12)] Waiting until timeout for monitored process [2023-11-26 11:57:50,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:50,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:50,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:57:50,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:50,770 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 11:57:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:50,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:57:50,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:50,793 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 11:57:50,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:50,800 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 11:57:50,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:50,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:57:50,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:50,833 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 11:57:51,129 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 11:57:51,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:51,988 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 11:57:51,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:57:51,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751026747] [2023-11-26 11:57:51,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751026747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:51,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-26 11:57:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361378232] [2023-11-26 11:57:51,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:51,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:57:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:57:51,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:57:51,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:57:55,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-26 11:57:55,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 33.57142857142857) internal successors, (470), 14 states have internal predecessors, (470), 0 states have call successors, (0), 0 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 11:57:55,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:55,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-26 11:57:55,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:00,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []