./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:54:01,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:54:01,340 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:54:01,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:54:01,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:54:01,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:54:01,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:54:01,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:54:01,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:54:01,378 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:54:01,383 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:54:01,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:54:01,384 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:54:01,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:54:01,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:54:01,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:54:01,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:54:01,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:54:01,391 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:54:01,392 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:54:01,392 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:54:01,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:54:01,398 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:54:01,398 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:54:01,399 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:54:01,399 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:54:01,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:54:01,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:54:01,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:54:01,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:01,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:54:01,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:54:01,405 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:54:01,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:54:01,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:54:01,406 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:54:01,406 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:54:01,407 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:54:01,408 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_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2023-11-06 21:54:01,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:54:01,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:54:01,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:54:01,786 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:54:01,787 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:54:01,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-06 21:54:05,003 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:54:05,214 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:54:05,215 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-06 21:54:05,223 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data/a4844ed55/54a9ee9ded5a4c599013eaf34fe2b281/FLAGd1586ea9f [2023-11-06 21:54:05,237 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data/a4844ed55/54a9ee9ded5a4c599013eaf34fe2b281 [2023-11-06 21:54:05,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:54:05,241 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:54:05,243 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:05,243 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:54:05,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:54:05,250 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:05" (1/1) ... [2023-11-06 21:54:05,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36287bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:05, skipping insertion in model container [2023-11-06 21:54:05,252 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:05" (1/1) ... [2023-11-06 21:54:05,282 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:54:05,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:05,502 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) [2023-11-06 21:54:05,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@427b20fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:05, skipping insertion in model container [2023-11-06 21:54:05,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:05,503 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 21:54:05,505 INFO L158 Benchmark]: Toolchain (without parser) took 262.96ms. Allocated memory is still 218.1MB. Free memory was 172.4MB in the beginning and 162.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:54:05,506 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 218.1MB. Free memory is still 193.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:54:05,507 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.19ms. Allocated memory is still 218.1MB. Free memory was 172.4MB in the beginning and 162.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:54:05,509 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 218.1MB. Free memory is still 193.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.19ms. Allocated memory is still 218.1MB. Free memory was 172.4MB in the beginning and 162.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 153]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:54:08,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:54:08,178 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 21:54:08,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:54:08,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:54:08,228 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:54:08,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:54:08,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:54:08,231 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:54:08,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:54:08,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:54:08,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:54:08,238 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:54:08,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:54:08,241 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:54:08,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:54:08,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:54:08,242 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:54:08,242 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:54:08,244 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:54:08,244 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:54:08,245 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:54:08,245 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:54:08,245 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 21:54:08,246 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 21:54:08,246 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:54:08,247 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:54:08,247 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:54:08,248 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:54:08,248 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:54:08,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:54:08,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:08,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:54:08,251 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:54:08,251 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 21:54:08,252 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 21:54:08,252 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:54:08,252 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:54:08,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:54:08,253 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 21:54:08,254 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:54:08,254 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_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2023-11-06 21:54:08,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:54:08,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:54:08,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:54:08,682 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:54:08,682 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:54:08,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-06 21:54:11,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:54:12,085 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:54:12,085 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-06 21:54:12,095 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data/aaa40581f/66c9b179fa63461693f6531008c92185/FLAG5decbb4a6 [2023-11-06 21:54:12,111 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/data/aaa40581f/66c9b179fa63461693f6531008c92185 [2023-11-06 21:54:12,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:54:12,116 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:54:12,117 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:12,117 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:54:12,123 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:54:12,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,125 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47022e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12, skipping insertion in model container [2023-11-06 21:54:12,125 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,154 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:54:12,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:12,399 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 21:54:12,420 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:54:12,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:12,478 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:54:12,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:12,585 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:54:12,586 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:54:12,595 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:54:12,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12 WrapperNode [2023-11-06 21:54:12,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:12,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:12,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:54:12,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:54:12,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,648 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,701 INFO L138 Inliner]: procedures = 29, calls = 74, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 247 [2023-11-06 21:54:12,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:12,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:54:12,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:54:12,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:54:12,713 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:54:12,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:54:12,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:54:12,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:54:12,802 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (1/1) ... [2023-11-06 21:54:12,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:12,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:12,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:54:12,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:54:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:54:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 21:54:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:54:12,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 21:54:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:54:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:54:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:54:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:54:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:54:12,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:54:12,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 21:54:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 21:54:12,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:54:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:54:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:54:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:54:12,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:54:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:54:12,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 21:54:12,918 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:54:13,100 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:54:13,102 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:54:13,939 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:54:14,245 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:54:14,245 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 21:54:14,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:14 BoogieIcfgContainer [2023-11-06 21:54:14,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:54:14,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:54:14,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:54:14,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:54:14,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:54:12" (1/3) ... [2023-11-06 21:54:14,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1a7ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:14, skipping insertion in model container [2023-11-06 21:54:14,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:12" (2/3) ... [2023-11-06 21:54:14,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1a7ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:14, skipping insertion in model container [2023-11-06 21:54:14,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:14" (3/3) ... [2023-11-06 21:54:14,262 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-11-06 21:54:14,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:54:14,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 21:54:14,283 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:54:14,437 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-06 21:54:14,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 238 transitions, 516 flow [2023-11-06 21:54:14,651 INFO L124 PetriNetUnfolderBase]: 14/221 cut-off events. [2023-11-06 21:54:14,652 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:54:14,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 221 events. 14/221 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 180. Up to 3 conditions per place. [2023-11-06 21:54:14,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 238 transitions, 516 flow [2023-11-06 21:54:14,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 216 transitions, 462 flow [2023-11-06 21:54:14,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:54:14,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 216 transitions, 462 flow [2023-11-06 21:54:14,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 216 transitions, 462 flow [2023-11-06 21:54:14,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 216 transitions, 462 flow [2023-11-06 21:54:14,794 INFO L124 PetriNetUnfolderBase]: 14/216 cut-off events. [2023-11-06 21:54:14,794 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:54:14,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 216 events. 14/216 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 286 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 180. Up to 3 conditions per place. [2023-11-06 21:54:14,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2023-11-06 21:54:36,280 INFO L134 LiptonReduction]: Checked pairs total: 15026 [2023-11-06 21:54:36,281 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-11-06 21:54:36,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:36,304 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;@2ab03ecb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:36,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-11-06 21:54:36,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:36,308 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 21:54:36,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:36,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:36,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:36,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:54:36,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash 37139, now seen corresponding path program 1 times [2023-11-06 21:54:36,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:54:36,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724002279] [2023-11-06 21:54:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:36,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:54:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:54:36,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:54:36,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:54:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:36,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:54:36,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:36,599 INFO L351 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 [2023-11-06 21:54:36,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:36,628 INFO L351 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 [2023-11-06 21:54:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:36,664 INFO L351 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 [2023-11-06 21:54:36,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:36,673 INFO L351 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 [2023-11-06 21:54:36,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:36,684 INFO L351 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 [2023-11-06 21:54:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:36,696 INFO L351 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 [2023-11-06 21:54:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:36,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:36,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:54:36,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724002279] [2023-11-06 21:54:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724002279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227478722] [2023-11-06 21:54:36,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:36,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:54:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:37,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 448 [2023-11-06 21:54:37,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:37,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:37,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 448 [2023-11-06 21:54:37,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:39,743 INFO L124 PetriNetUnfolderBase]: 9515/13185 cut-off events. [2023-11-06 21:54:39,744 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2023-11-06 21:54:39,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26488 conditions, 13185 events. 9515/13185 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 66345 event pairs, 7849 based on Foata normal form. 0/5644 useless extension candidates. Maximal degree in co-relation 26364. Up to 12492 conditions per place. [2023-11-06 21:54:39,919 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 53 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-11-06 21:54:39,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 288 flow [2023-11-06 21:54:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-11-06 21:54:39,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-11-06 21:54:39,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-11-06 21:54:39,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-11-06 21:54:39,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:39,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-11-06 21:54:39,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:39,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:39,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:39,980 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 164 flow. Second operand 3 states and 630 transitions. [2023-11-06 21:54:39,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 288 flow [2023-11-06 21:54:40,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 268 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 21:54:40,014 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 175 flow [2023-11-06 21:54:40,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-11-06 21:54:40,020 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-11-06 21:54:40,020 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 175 flow [2023-11-06 21:54:40,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:40,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:40,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:40,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:54:40,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:54:40,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:54:40,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash 37138, now seen corresponding path program 1 times [2023-11-06 21:54:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:54:40,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413049989] [2023-11-06 21:54:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:40,244 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 [2023-11-06 21:54:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:54:40,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:54:40,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:54:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:40,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:40,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:40,380 INFO L351 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 [2023-11-06 21:54:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:40,397 INFO L351 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 [2023-11-06 21:54:40,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:40,417 INFO L351 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 [2023-11-06 21:54:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:40,436 INFO L351 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 [2023-11-06 21:54:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:40,452 INFO L351 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 [2023-11-06 21:54:40,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:40,467 INFO L351 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 [2023-11-06 21:54:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:40,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:40,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:54:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413049989] [2023-11-06 21:54:40,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413049989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:40,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:40,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051194947] [2023-11-06 21:54:40,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:40,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:54:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:40,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 448 [2023-11-06 21:54:40,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:40,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:40,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 448 [2023-11-06 21:54:40,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:42,707 INFO L124 PetriNetUnfolderBase]: 9441/13071 cut-off events. [2023-11-06 21:54:42,707 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 21:54:42,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25727 conditions, 13071 events. 9441/13071 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 65941 event pairs, 7783 based on Foata normal form. 2/5571 useless extension candidates. Maximal degree in co-relation 25689. Up to 12370 conditions per place. [2023-11-06 21:54:42,805 INFO L140 encePairwiseOnDemand]: 443/448 looper letters, 47 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2023-11-06 21:54:42,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 281 flow [2023-11-06 21:54:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2023-11-06 21:54:42,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2023-11-06 21:54:42,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2023-11-06 21:54:42,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2023-11-06 21:54:42,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:42,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2023-11-06 21:54:42,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,822 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 175 flow. Second operand 3 states and 618 transitions. [2023-11-06 21:54:42,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 281 flow [2023-11-06 21:54:42,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 274 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:42,827 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 180 flow [2023-11-06 21:54:42,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2023-11-06 21:54:42,829 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-11-06 21:54:42,829 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 180 flow [2023-11-06 21:54:42,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:42,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:54:42,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:43,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:54:43,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:54:43,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1154339, now seen corresponding path program 1 times [2023-11-06 21:54:43,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:54:43,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120814996] [2023-11-06 21:54:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:43,043 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 [2023-11-06 21:54:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:54:43,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:54:43,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:54:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:43,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:54:43,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:43,171 INFO L351 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 13 [2023-11-06 21:54:43,184 INFO L351 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 [2023-11-06 21:54:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:43,234 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 21:54:43,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 21:54:43,245 INFO L351 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 [2023-11-06 21:54:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:43,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:43,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:54:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120814996] [2023-11-06 21:54:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120814996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:43,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:43,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 21:54:43,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465925543] [2023-11-06 21:54:43,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:43,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:54:43,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:54:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:54:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:54:45,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:54:47,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:54:47,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 448 [2023-11-06 21:54:47,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:47,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:47,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 448 [2023-11-06 21:54:47,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:51,694 INFO L124 PetriNetUnfolderBase]: 11235/15606 cut-off events. [2023-11-06 21:54:51,695 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-11-06 21:54:51,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30843 conditions, 15606 events. 11235/15606 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 82989 event pairs, 6504 based on Foata normal form. 0/6654 useless extension candidates. Maximal degree in co-relation 30765. Up to 11788 conditions per place. [2023-11-06 21:54:51,806 INFO L140 encePairwiseOnDemand]: 439/448 looper letters, 95 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2023-11-06 21:54:51,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 124 transitions, 553 flow [2023-11-06 21:54:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:54:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1195 transitions. [2023-11-06 21:54:51,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445684523809524 [2023-11-06 21:54:51,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1195 transitions. [2023-11-06 21:54:51,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1195 transitions. [2023-11-06 21:54:51,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:51,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1195 transitions. [2023-11-06 21:54:51,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,830 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,831 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 180 flow. Second operand 6 states and 1195 transitions. [2023-11-06 21:54:51,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 124 transitions, 553 flow [2023-11-06 21:54:51,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 529 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:51,836 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 282 flow [2023-11-06 21:54:51,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-11-06 21:54:51,837 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-11-06 21:54:51,838 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 282 flow [2023-11-06 21:54:51,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:51,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:51,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:52,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:54:52,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:54:52,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash 37194, now seen corresponding path program 1 times [2023-11-06 21:54:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:54:52,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926216358] [2023-11-06 21:54:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:52,057 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 [2023-11-06 21:54:52,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:54:52,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:54:52,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:54:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:52,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:54:52,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:52,211 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:54:52,212 INFO L351 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 19 treesize of output 22 [2023-11-06 21:54:52,256 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 21:54:52,256 INFO L351 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 24 treesize of output 22 [2023-11-06 21:54:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:52,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:52,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:54:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926216358] [2023-11-06 21:54:52,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926216358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:52,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:52,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:52,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356754832] [2023-11-06 21:54:52,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:54:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:52,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 448 [2023-11-06 21:54:52,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:52,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:52,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 448 [2023-11-06 21:54:52,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:54,290 INFO L124 PetriNetUnfolderBase]: 8855/12566 cut-off events. [2023-11-06 21:54:54,290 INFO L125 PetriNetUnfolderBase]: For 2107/2107 co-relation queries the response was YES. [2023-11-06 21:54:54,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26085 conditions, 12566 events. 8855/12566 cut-off events. For 2107/2107 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 66133 event pairs, 7089 based on Foata normal form. 2/6312 useless extension candidates. Maximal degree in co-relation 26039. Up to 11646 conditions per place. [2023-11-06 21:54:54,384 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 71 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-11-06 21:54:54,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 91 transitions, 440 flow [2023-11-06 21:54:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-11-06 21:54:54,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650297619047619 [2023-11-06 21:54:54,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-11-06 21:54:54,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-11-06 21:54:54,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:54,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-11-06 21:54:54,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,398 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 282 flow. Second operand 3 states and 625 transitions. [2023-11-06 21:54:54,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 91 transitions, 440 flow [2023-11-06 21:54:54,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:54,404 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 278 flow [2023-11-06 21:54:54,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2023-11-06 21:54:54,405 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-11-06 21:54:54,405 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 278 flow [2023-11-06 21:54:54,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:54,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:54:54,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-06 21:54:54,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:54:54,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:54:54,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:54,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1154286, now seen corresponding path program 1 times [2023-11-06 21:54:54,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:54:54,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357591858] [2023-11-06 21:54:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:54,620 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 [2023-11-06 21:54:54,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:54:54,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:54:54,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:54:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:54,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:54:54,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:54,732 INFO L351 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 [2023-11-06 21:54:54,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:54,752 INFO L351 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 [2023-11-06 21:54:54,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:54,766 INFO L351 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 [2023-11-06 21:54:54,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:54,788 INFO L351 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 [2023-11-06 21:54:54,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:54,822 INFO L351 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 [2023-11-06 21:54:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:54,838 INFO L351 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 [2023-11-06 21:54:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:54,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:55,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:54:55,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357591858] [2023-11-06 21:54:55,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357591858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:55,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:55,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 21:54:55,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529475757] [2023-11-06 21:54:55,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:55,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:54:55,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:54:55,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:54:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:54:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 448 [2023-11-06 21:54:56,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:56,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:56,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 448 [2023-11-06 21:54:56,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:58,171 INFO L124 PetriNetUnfolderBase]: 8901/12634 cut-off events. [2023-11-06 21:54:58,171 INFO L125 PetriNetUnfolderBase]: For 4216/4216 co-relation queries the response was YES. [2023-11-06 21:54:58,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27046 conditions, 12634 events. 8901/12634 cut-off events. For 4216/4216 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 66330 event pairs, 7213 based on Foata normal form. 3/6389 useless extension candidates. Maximal degree in co-relation 27002. Up to 11935 conditions per place. [2023-11-06 21:54:58,255 INFO L140 encePairwiseOnDemand]: 444/448 looper letters, 54 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2023-11-06 21:54:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 398 flow [2023-11-06 21:54:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:54:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1172 transitions. [2023-11-06 21:54:58,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43601190476190477 [2023-11-06 21:54:58,262 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1172 transitions. [2023-11-06 21:54:58,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1172 transitions. [2023-11-06 21:54:58,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:58,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1172 transitions. [2023-11-06 21:54:58,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:58,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:58,274 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:58,275 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 278 flow. Second operand 6 states and 1172 transitions. [2023-11-06 21:54:58,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 398 flow [2023-11-06 21:54:58,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 376 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:58,285 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 268 flow [2023-11-06 21:54:58,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2023-11-06 21:54:58,286 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2023-11-06 21:54:58,286 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 268 flow [2023-11-06 21:54:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:58,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:58,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:54:58,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:58,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:54:58,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:54:58,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash 16957546, now seen corresponding path program 1 times [2023-11-06 21:54:58,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:54:58,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533720029] [2023-11-06 21:54:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:58,499 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 [2023-11-06 21:54:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:54:58,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:54:58,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:54:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:58,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:58,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:58,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:58,613 INFO L351 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 [2023-11-06 21:54:58,630 INFO L351 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 [2023-11-06 21:54:58,640 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:54:58,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:58,656 INFO L351 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 [2023-11-06 21:54:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:58,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:58,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:54:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533720029] [2023-11-06 21:54:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533720029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:58,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:58,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:58,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031632555] [2023-11-06 21:54:58,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:58,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:54:58,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:58,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 448 [2023-11-06 21:54:58,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:58,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:58,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 448 [2023-11-06 21:54:58,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:00,012 INFO L124 PetriNetUnfolderBase]: 8839/12530 cut-off events. [2023-11-06 21:55:00,012 INFO L125 PetriNetUnfolderBase]: For 4093/4093 co-relation queries the response was YES. [2023-11-06 21:55:00,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26743 conditions, 12530 events. 8839/12530 cut-off events. For 4093/4093 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 65875 event pairs, 7163 based on Foata normal form. 132/6444 useless extension candidates. Maximal degree in co-relation 26699. Up to 11825 conditions per place. [2023-11-06 21:55:00,080 INFO L140 encePairwiseOnDemand]: 445/448 looper letters, 58 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-11-06 21:55:00,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 382 flow [2023-11-06 21:55:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:55:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-11-06 21:55:00,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680059523809524 [2023-11-06 21:55:00,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-11-06 21:55:00,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-11-06 21:55:00,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:00,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-11-06 21:55:00,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:00,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:00,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:00,090 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 268 flow. Second operand 3 states and 629 transitions. [2023-11-06 21:55:00,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 382 flow [2023-11-06 21:55:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 360 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-06 21:55:00,098 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 244 flow [2023-11-06 21:55:00,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-11-06 21:55:00,099 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-11-06 21:55:00,099 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 244 flow [2023-11-06 21:55:00,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:00,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:00,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:55:00,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-06 21:55:00,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:00,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:00,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash 16957545, now seen corresponding path program 1 times [2023-11-06 21:55:00,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:00,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853510478] [2023-11-06 21:55:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:00,312 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 [2023-11-06 21:55:00,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:00,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:00,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:55:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:00,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:55:00,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:00,415 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:55:00,416 INFO L351 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 9 treesize of output 15 [2023-11-06 21:55:00,453 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:55:00,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 21:55:00,482 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:55:00,482 INFO L351 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 9 treesize of output 15 [2023-11-06 21:55:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:00,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:00,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853510478] [2023-11-06 21:55:00,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853510478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:00,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:00,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:55:00,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132820161] [2023-11-06 21:55:00,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:00,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:55:00,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 448 [2023-11-06 21:55:00,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:00,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:00,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 448 [2023-11-06 21:55:00,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:02,065 INFO L124 PetriNetUnfolderBase]: 9239/13136 cut-off events. [2023-11-06 21:55:02,065 INFO L125 PetriNetUnfolderBase]: For 4179/4179 co-relation queries the response was YES. [2023-11-06 21:55:02,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27991 conditions, 13136 events. 9239/13136 cut-off events. For 4179/4179 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 69353 event pairs, 7391 based on Foata normal form. 0/6692 useless extension candidates. Maximal degree in co-relation 27976. Up to 12172 conditions per place. [2023-11-06 21:55:02,134 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 70 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-11-06 21:55:02,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 440 flow [2023-11-06 21:55:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:55:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-11-06 21:55:02,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-11-06 21:55:02,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-11-06 21:55:02,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-11-06 21:55:02,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:02,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-11-06 21:55:02,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,150 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 244 flow. Second operand 3 states and 624 transitions. [2023-11-06 21:55:02,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 440 flow [2023-11-06 21:55:02,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:55:02,158 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 291 flow [2023-11-06 21:55:02,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2023-11-06 21:55:02,159 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2023-11-06 21:55:02,159 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 291 flow [2023-11-06 21:55:02,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:02,160 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 21:55:02,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:55:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:02,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:02,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 30552072, now seen corresponding path program 2 times [2023-11-06 21:55:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:02,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409528965] [2023-11-06 21:55:02,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:02,373 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 [2023-11-06 21:55:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:02,374 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:55:02,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:55:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:02,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:55:02,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:02,484 INFO L351 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 [2023-11-06 21:55:02,495 INFO L351 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 [2023-11-06 21:55:02,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:02,518 INFO L351 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 [2023-11-06 21:55:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:02,531 INFO L351 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 [2023-11-06 21:55:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 21:55:02,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:02,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:02,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409528965] [2023-11-06 21:55:02,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409528965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:02,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:02,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:55:02,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868338052] [2023-11-06 21:55:02,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:02,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:55:02,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 448 [2023-11-06 21:55:02,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 291 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:02,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 448 [2023-11-06 21:55:02,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:03,892 INFO L124 PetriNetUnfolderBase]: 6538/9451 cut-off events. [2023-11-06 21:55:03,892 INFO L125 PetriNetUnfolderBase]: For 4314/4314 co-relation queries the response was YES. [2023-11-06 21:55:03,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20904 conditions, 9451 events. 6538/9451 cut-off events. For 4314/4314 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 49127 event pairs, 5221 based on Foata normal form. 671/5331 useless extension candidates. Maximal degree in co-relation 20886. Up to 8900 conditions per place. [2023-11-06 21:55:03,928 INFO L140 encePairwiseOnDemand]: 445/448 looper letters, 59 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-11-06 21:55:03,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 399 flow [2023-11-06 21:55:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:55:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-11-06 21:55:03,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46651785714285715 [2023-11-06 21:55:03,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-11-06 21:55:03,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-11-06 21:55:03,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:03,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-11-06 21:55:03,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:03,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:03,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:03,938 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 291 flow. Second operand 3 states and 627 transitions. [2023-11-06 21:55:03,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 399 flow [2023-11-06 21:55:03,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 371 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-06 21:55:03,944 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 253 flow [2023-11-06 21:55:03,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-11-06 21:55:03,945 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-11-06 21:55:03,945 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 253 flow [2023-11-06 21:55:03,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:03,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:03,946 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 21:55:03,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-06 21:55:04,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:04,158 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:04,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:04,158 INFO L85 PathProgramCache]: Analyzing trace with hash 30552019, now seen corresponding path program 2 times [2023-11-06 21:55:04,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:04,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028319298] [2023-11-06 21:55:04,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:04,159 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 [2023-11-06 21:55:04,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:04,160 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:04,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:55:04,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:04,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:04,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:55:04,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:04,283 INFO L351 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 [2023-11-06 21:55:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:04,310 INFO L351 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 [2023-11-06 21:55:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:04,323 INFO L351 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 [2023-11-06 21:55:04,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:04,330 INFO L351 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 [2023-11-06 21:55:04,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:04,343 INFO L351 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 [2023-11-06 21:55:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:04,351 INFO L351 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 [2023-11-06 21:55:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:04,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:05,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:05,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028319298] [2023-11-06 21:55:05,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028319298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:05,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:05,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 21:55:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097611488] [2023-11-06 21:55:05,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:55:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:55:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:55:10,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 448 [2023-11-06 21:55:10,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 253 flow. Second operand has 12 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:10,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:10,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 448 [2023-11-06 21:55:10,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:14,614 INFO L124 PetriNetUnfolderBase]: 6571/9508 cut-off events. [2023-11-06 21:55:14,614 INFO L125 PetriNetUnfolderBase]: For 4246/4246 co-relation queries the response was YES. [2023-11-06 21:55:14,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21014 conditions, 9508 events. 6571/9508 cut-off events. For 4246/4246 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 49354 event pairs, 5241 based on Foata normal form. 0/4700 useless extension candidates. Maximal degree in co-relation 20999. Up to 8956 conditions per place. [2023-11-06 21:55:14,662 INFO L140 encePairwiseOnDemand]: 444/448 looper letters, 54 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2023-11-06 21:55:14,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 88 transitions, 463 flow [2023-11-06 21:55:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:55:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 21:55:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2306 transitions. [2023-11-06 21:55:14,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289434523809524 [2023-11-06 21:55:14,671 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2306 transitions. [2023-11-06 21:55:14,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2306 transitions. [2023-11-06 21:55:14,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:14,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2306 transitions. [2023-11-06 21:55:14,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 192.16666666666666) internal successors, (2306), 12 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 448.0) internal successors, (5824), 13 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,692 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 448.0) internal successors, (5824), 13 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,692 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 253 flow. Second operand 12 states and 2306 transitions. [2023-11-06 21:55:14,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 88 transitions, 463 flow [2023-11-06 21:55:14,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:55:14,699 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 388 flow [2023-11-06 21:55:14,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=388, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-11-06 21:55:14,704 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2023-11-06 21:55:14,704 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 388 flow [2023-11-06 21:55:14,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:14,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:14,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:14,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:14,918 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:14,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash 518975784, now seen corresponding path program 1 times [2023-11-06 21:55:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:14,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665807426] [2023-11-06 21:55:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:14,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:14,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:14,920 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:14,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:55:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:15,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:55:15,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:15,036 INFO L351 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 5 [2023-11-06 21:55:15,048 INFO L351 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 [2023-11-06 21:55:15,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:15,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:55:15,111 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 21:55:15,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 21:55:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:15,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:15,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665807426] [2023-11-06 21:55:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665807426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:15,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:15,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:15,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970455593] [2023-11-06 21:55:15,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:15,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:55:15,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:55:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:55:15,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 448 [2023-11-06 21:55:15,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:15,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:15,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 448 [2023-11-06 21:55:15,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:16,635 INFO L124 PetriNetUnfolderBase]: 3734/5796 cut-off events. [2023-11-06 21:55:16,635 INFO L125 PetriNetUnfolderBase]: For 2745/2745 co-relation queries the response was YES. [2023-11-06 21:55:16,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12803 conditions, 5796 events. 3734/5796 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30618 event pairs, 2462 based on Foata normal form. 17/3360 useless extension candidates. Maximal degree in co-relation 12781. Up to 4905 conditions per place. [2023-11-06 21:55:16,687 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 80 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-11-06 21:55:16,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 100 transitions, 594 flow [2023-11-06 21:55:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:55:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:55:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 805 transitions. [2023-11-06 21:55:16,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2023-11-06 21:55:16,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 805 transitions. [2023-11-06 21:55:16,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 805 transitions. [2023-11-06 21:55:16,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:16,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 805 transitions. [2023-11-06 21:55:16,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:16,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:16,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:16,699 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 388 flow. Second operand 4 states and 805 transitions. [2023-11-06 21:55:16,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 100 transitions, 594 flow [2023-11-06 21:55:16,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 558 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-06 21:55:16,705 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 356 flow [2023-11-06 21:55:16,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2023-11-06 21:55:16,707 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2023-11-06 21:55:16,707 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 356 flow [2023-11-06 21:55:16,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:16,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:16,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:16,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:55:16,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:16,920 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:16,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1623047313, now seen corresponding path program 1 times [2023-11-06 21:55:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:16,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649686320] [2023-11-06 21:55:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:16,922 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:16,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 21:55:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:17,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:55:17,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:17,057 INFO L351 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 15 treesize of output 9 [2023-11-06 21:55:17,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:17,098 INFO L351 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 20 treesize of output 1 [2023-11-06 21:55:17,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:17,110 INFO L351 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 10 treesize of output 1 [2023-11-06 21:55:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:17,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:17,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:17,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:17,154 INFO L351 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 10 treesize of output 1 [2023-11-06 21:55:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:17,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:17,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649686320] [2023-11-06 21:55:17,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649686320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:17,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:17,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:17,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879428524] [2023-11-06 21:55:17,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:17,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:55:17,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:55:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:55:18,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 448 [2023-11-06 21:55:18,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 356 flow. Second operand has 5 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:18,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:18,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 448 [2023-11-06 21:55:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:18,924 INFO L124 PetriNetUnfolderBase]: 3735/5794 cut-off events. [2023-11-06 21:55:18,924 INFO L125 PetriNetUnfolderBase]: For 2886/2886 co-relation queries the response was YES. [2023-11-06 21:55:18,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12873 conditions, 5794 events. 3735/5794 cut-off events. For 2886/2886 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30651 event pairs, 2469 based on Foata normal form. 0/3340 useless extension candidates. Maximal degree in co-relation 12851. Up to 5200 conditions per place. [2023-11-06 21:55:18,951 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 66 selfloop transitions, 17 changer transitions 0/96 dead transitions. [2023-11-06 21:55:18,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 96 transitions, 555 flow [2023-11-06 21:55:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:55:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:55:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 988 transitions. [2023-11-06 21:55:18,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44107142857142856 [2023-11-06 21:55:18,956 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 988 transitions. [2023-11-06 21:55:18,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 988 transitions. [2023-11-06 21:55:18,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:18,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 988 transitions. [2023-11-06 21:55:18,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:18,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:18,964 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:18,965 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 356 flow. Second operand 5 states and 988 transitions. [2023-11-06 21:55:18,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 96 transitions, 555 flow [2023-11-06 21:55:18,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 96 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:55:18,972 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 417 flow [2023-11-06 21:55:18,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2023-11-06 21:55:18,973 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-11-06 21:55:18,973 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 417 flow [2023-11-06 21:55:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:18,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:18,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:18,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:19,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:19,179 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:19,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1623047314, now seen corresponding path program 1 times [2023-11-06 21:55:19,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:19,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340725892] [2023-11-06 21:55:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:19,181 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 [2023-11-06 21:55:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:19,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:19,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 21:55:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:19,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:55:19,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:19,279 INFO L351 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 [2023-11-06 21:55:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:19,290 INFO L351 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 [2023-11-06 21:55:19,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:19,308 INFO L351 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 [2023-11-06 21:55:19,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:19,317 INFO L351 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 [2023-11-06 21:55:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:19,323 INFO L351 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 [2023-11-06 21:55:19,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:19,332 INFO L351 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 [2023-11-06 21:55:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:19,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:19,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:19,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340725892] [2023-11-06 21:55:19,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340725892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:19,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:19,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:55:19,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832552012] [2023-11-06 21:55:19,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:19,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:55:19,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:19,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:55:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:55:19,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 448 [2023-11-06 21:55:19,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 417 flow. Second operand has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:19,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:19,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 448 [2023-11-06 21:55:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:20,189 INFO L124 PetriNetUnfolderBase]: 2280/3672 cut-off events. [2023-11-06 21:55:20,189 INFO L125 PetriNetUnfolderBase]: For 2285/2285 co-relation queries the response was YES. [2023-11-06 21:55:20,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8919 conditions, 3672 events. 2280/3672 cut-off events. For 2285/2285 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18236 event pairs, 1535 based on Foata normal form. 0/2560 useless extension candidates. Maximal degree in co-relation 8894. Up to 2990 conditions per place. [2023-11-06 21:55:20,209 INFO L140 encePairwiseOnDemand]: 440/448 looper letters, 68 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2023-11-06 21:55:20,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 654 flow [2023-11-06 21:55:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:55:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:55:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 805 transitions. [2023-11-06 21:55:20,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2023-11-06 21:55:20,213 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 805 transitions. [2023-11-06 21:55:20,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 805 transitions. [2023-11-06 21:55:20,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:20,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 805 transitions. [2023-11-06 21:55:20,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,220 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,221 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 417 flow. Second operand 4 states and 805 transitions. [2023-11-06 21:55:20,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 654 flow [2023-11-06 21:55:20,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 103 transitions, 639 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:55:20,230 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 492 flow [2023-11-06 21:55:20,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=492, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2023-11-06 21:55:20,231 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2023-11-06 21:55:20,231 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 492 flow [2023-11-06 21:55:20,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:20,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:20,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:20,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:20,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:20,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1225076998, now seen corresponding path program 1 times [2023-11-06 21:55:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:20,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521549422] [2023-11-06 21:55:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:20,445 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 [2023-11-06 21:55:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:20,446 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:20,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 21:55:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:20,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:55:20,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:20,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:20,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521549422] [2023-11-06 21:55:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521549422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:20,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218745005] [2023-11-06 21:55:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:55:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:55:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:55:20,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 448 [2023-11-06 21:55:20,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 492 flow. Second operand has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:20,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 448 [2023-11-06 21:55:20,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:21,955 INFO L124 PetriNetUnfolderBase]: 3768/6006 cut-off events. [2023-11-06 21:55:21,955 INFO L125 PetriNetUnfolderBase]: For 5141/5141 co-relation queries the response was YES. [2023-11-06 21:55:21,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14888 conditions, 6006 events. 3768/6006 cut-off events. For 5141/5141 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33544 event pairs, 2058 based on Foata normal form. 412/4917 useless extension candidates. Maximal degree in co-relation 14861. Up to 3297 conditions per place. [2023-11-06 21:55:21,994 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 140 selfloop transitions, 5 changer transitions 0/162 dead transitions. [2023-11-06 21:55:21,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 162 transitions, 1057 flow [2023-11-06 21:55:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:55:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:55:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1054 transitions. [2023-11-06 21:55:21,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705357142857143 [2023-11-06 21:55:21,999 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1054 transitions. [2023-11-06 21:55:21,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1054 transitions. [2023-11-06 21:55:22,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:22,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1054 transitions. [2023-11-06 21:55:22,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,008 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,008 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 492 flow. Second operand 5 states and 1054 transitions. [2023-11-06 21:55:22,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 162 transitions, 1057 flow [2023-11-06 21:55:22,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 162 transitions, 1045 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:55:22,033 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 519 flow [2023-11-06 21:55:22,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=519, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2023-11-06 21:55:22,035 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-11-06 21:55:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 519 flow [2023-11-06 21:55:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:22,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:22,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:22,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:22,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:22,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1077964750, now seen corresponding path program 1 times [2023-11-06 21:55:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:22,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981022150] [2023-11-06 21:55:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:22,248 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 [2023-11-06 21:55:22,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:22,251 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:22,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 21:55:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:22,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:55:22,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:22,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:22,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981022150] [2023-11-06 21:55:22,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981022150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:22,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:22,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:22,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326838553] [2023-11-06 21:55:22,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:22,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:55:22,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:22,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:55:22,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:55:22,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 448 [2023-11-06 21:55:22,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 519 flow. Second operand has 5 states, 5 states have (on average 191.2) internal successors, (956), 5 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:22,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 448 [2023-11-06 21:55:22,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:23,473 INFO L124 PetriNetUnfolderBase]: 2725/4622 cut-off events. [2023-11-06 21:55:23,473 INFO L125 PetriNetUnfolderBase]: For 5931/5931 co-relation queries the response was YES. [2023-11-06 21:55:23,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12474 conditions, 4622 events. 2725/4622 cut-off events. For 5931/5931 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 25757 event pairs, 1780 based on Foata normal form. 0/3642 useless extension candidates. Maximal degree in co-relation 12444. Up to 3297 conditions per place. [2023-11-06 21:55:23,497 INFO L140 encePairwiseOnDemand]: 440/448 looper letters, 108 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-11-06 21:55:23,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 129 transitions, 894 flow [2023-11-06 21:55:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:55:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:55:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1028 transitions. [2023-11-06 21:55:23,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589285714285714 [2023-11-06 21:55:23,501 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1028 transitions. [2023-11-06 21:55:23,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1028 transitions. [2023-11-06 21:55:23,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:23,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1028 transitions. [2023-11-06 21:55:23,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.6) internal successors, (1028), 5 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,507 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,507 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 519 flow. Second operand 5 states and 1028 transitions. [2023-11-06 21:55:23,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 129 transitions, 894 flow [2023-11-06 21:55:23,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 889 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:55:23,525 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 537 flow [2023-11-06 21:55:23,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2023-11-06 21:55:23,526 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2023-11-06 21:55:23,526 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 537 flow [2023-11-06 21:55:23,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.2) internal successors, (956), 5 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:23,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:23,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:23,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:23,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:23,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash 942830505, now seen corresponding path program 1 times [2023-11-06 21:55:23,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:23,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828909037] [2023-11-06 21:55:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:23,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:23,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:23,741 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:23,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 21:55:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:23,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:55:23,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:23,837 INFO L351 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 5 [2023-11-06 21:55:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:23,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:23,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:23,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828909037] [2023-11-06 21:55:23,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828909037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:23,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:23,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:55:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039020005] [2023-11-06 21:55:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:55:24,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 448 [2023-11-06 21:55:24,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 537 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:24,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:24,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 448 [2023-11-06 21:55:24,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:24,790 INFO L124 PetriNetUnfolderBase]: 2580/4243 cut-off events. [2023-11-06 21:55:24,790 INFO L125 PetriNetUnfolderBase]: For 5744/5746 co-relation queries the response was YES. [2023-11-06 21:55:24,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12357 conditions, 4243 events. 2580/4243 cut-off events. For 5744/5746 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 22289 event pairs, 1611 based on Foata normal form. 80/3789 useless extension candidates. Maximal degree in co-relation 12325. Up to 3319 conditions per place. [2023-11-06 21:55:24,812 INFO L140 encePairwiseOnDemand]: 444/448 looper letters, 79 selfloop transitions, 10 changer transitions 0/103 dead transitions. [2023-11-06 21:55:24,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 784 flow [2023-11-06 21:55:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:55:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-11-06 21:55:24,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2023-11-06 21:55:24,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-11-06 21:55:24,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-11-06 21:55:24,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:24,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-11-06 21:55:24,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:24,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:24,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:24,819 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 537 flow. Second operand 3 states and 636 transitions. [2023-11-06 21:55:24,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 784 flow [2023-11-06 21:55:24,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 779 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:55:24,832 INFO L231 Difference]: Finished difference. Result has 96 places, 91 transitions, 548 flow [2023-11-06 21:55:24,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=548, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2023-11-06 21:55:24,833 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2023-11-06 21:55:24,833 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 548 flow [2023-11-06 21:55:24,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:24,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:24,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:24,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:25,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:25,034 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:25,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash 942830504, now seen corresponding path program 1 times [2023-11-06 21:55:25,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:25,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054997034] [2023-11-06 21:55:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:25,035 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 [2023-11-06 21:55:25,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:25,035 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:25,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 21:55:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:25,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:55:25,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:25,132 INFO L351 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 [2023-11-06 21:55:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:25,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:25,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:25,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054997034] [2023-11-06 21:55:25,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054997034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:25,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:25,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:55:25,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808068092] [2023-11-06 21:55:25,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:25,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:25,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:25,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:55:25,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 448 [2023-11-06 21:55:25,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 548 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:25,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:25,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 448 [2023-11-06 21:55:25,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:26,024 INFO L124 PetriNetUnfolderBase]: 2741/4292 cut-off events. [2023-11-06 21:55:26,024 INFO L125 PetriNetUnfolderBase]: For 6584/6586 co-relation queries the response was YES. [2023-11-06 21:55:26,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12968 conditions, 4292 events. 2741/4292 cut-off events. For 6584/6586 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20827 event pairs, 1752 based on Foata normal form. 80/3926 useless extension candidates. Maximal degree in co-relation 12937. Up to 3401 conditions per place. [2023-11-06 21:55:26,048 INFO L140 encePairwiseOnDemand]: 444/448 looper letters, 83 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2023-11-06 21:55:26,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 97 transitions, 759 flow [2023-11-06 21:55:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:55:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2023-11-06 21:55:26,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568452380952381 [2023-11-06 21:55:26,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2023-11-06 21:55:26,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2023-11-06 21:55:26,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:26,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2023-11-06 21:55:26,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,056 INFO L175 Difference]: Start difference. First operand has 96 places, 91 transitions, 548 flow. Second operand 3 states and 614 transitions. [2023-11-06 21:55:26,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 97 transitions, 759 flow [2023-11-06 21:55:26,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:55:26,073 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 530 flow [2023-11-06 21:55:26,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=530, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2023-11-06 21:55:26,074 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-11-06 21:55:26,074 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 530 flow [2023-11-06 21:55:26,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:26,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:26,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:26,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:26,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:26,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:26,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1593185467, now seen corresponding path program 1 times [2023-11-06 21:55:26,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:26,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935491309] [2023-11-06 21:55:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:26,288 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 [2023-11-06 21:55:26,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:26,289 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:26,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 21:55:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:26,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:55:26,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:26,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:26,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935491309] [2023-11-06 21:55:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935491309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:26,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:26,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 21:55:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528615829] [2023-11-06 21:55:26,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:26,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:55:26,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:55:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:55:27,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 448 [2023-11-06 21:55:27,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 530 flow. Second operand has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:27,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:27,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 448 [2023-11-06 21:55:27,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:29,122 INFO L124 PetriNetUnfolderBase]: 3710/5828 cut-off events. [2023-11-06 21:55:29,122 INFO L125 PetriNetUnfolderBase]: For 8606/8606 co-relation queries the response was YES. [2023-11-06 21:55:29,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16928 conditions, 5828 events. 3710/5828 cut-off events. For 8606/8606 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 32247 event pairs, 1537 based on Foata normal form. 364/5425 useless extension candidates. Maximal degree in co-relation 16897. Up to 2270 conditions per place. [2023-11-06 21:55:29,165 INFO L140 encePairwiseOnDemand]: 439/448 looper letters, 218 selfloop transitions, 11 changer transitions 0/244 dead transitions. [2023-11-06 21:55:29,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 244 transitions, 1695 flow [2023-11-06 21:55:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:55:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 21:55:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2047 transitions. [2023-11-06 21:55:29,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45691964285714287 [2023-11-06 21:55:29,171 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2047 transitions. [2023-11-06 21:55:29,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2047 transitions. [2023-11-06 21:55:29,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:29,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2047 transitions. [2023-11-06 21:55:29,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 204.7) internal successors, (2047), 10 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:29,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 448.0) internal successors, (4928), 11 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:29,181 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 448.0) internal successors, (4928), 11 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:29,181 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 530 flow. Second operand 10 states and 2047 transitions. [2023-11-06 21:55:29,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 244 transitions, 1695 flow [2023-11-06 21:55:29,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 244 transitions, 1679 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:55:29,205 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 587 flow [2023-11-06 21:55:29,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=587, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-11-06 21:55:29,206 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2023-11-06 21:55:29,206 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 587 flow [2023-11-06 21:55:29,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:29,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:29,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:29,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:29,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:29,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:29,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -434073331, now seen corresponding path program 1 times [2023-11-06 21:55:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:29,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625850874] [2023-11-06 21:55:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:29,420 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 [2023-11-06 21:55:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:29,421 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:29,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 21:55:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:29,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:55:29,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:29,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:29,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625850874] [2023-11-06 21:55:29,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625850874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:29,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:29,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 21:55:29,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593420196] [2023-11-06 21:55:29,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:29,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:55:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:55:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:55:30,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 448 [2023-11-06 21:55:30,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 587 flow. Second operand has 10 states, 10 states have (on average 189.4) internal successors, (1894), 10 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:30,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:30,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 448 [2023-11-06 21:55:30,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:31,834 INFO L124 PetriNetUnfolderBase]: 2640/4557 cut-off events. [2023-11-06 21:55:31,835 INFO L125 PetriNetUnfolderBase]: For 9506/9506 co-relation queries the response was YES. [2023-11-06 21:55:31,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14552 conditions, 4557 events. 2640/4557 cut-off events. For 9506/9506 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25836 event pairs, 1006 based on Foata normal form. 191/4318 useless extension candidates. Maximal degree in co-relation 14517. Up to 1442 conditions per place. [2023-11-06 21:55:31,871 INFO L140 encePairwiseOnDemand]: 437/448 looper letters, 149 selfloop transitions, 10 changer transitions 0/174 dead transitions. [2023-11-06 21:55:31,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 174 transitions, 1266 flow [2023-11-06 21:55:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:55:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 21:55:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2004 transitions. [2023-11-06 21:55:31,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473214285714286 [2023-11-06 21:55:31,877 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2004 transitions. [2023-11-06 21:55:31,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2004 transitions. [2023-11-06 21:55:31,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:31,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2004 transitions. [2023-11-06 21:55:31,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 200.4) internal successors, (2004), 10 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:31,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 448.0) internal successors, (4928), 11 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:31,888 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 448.0) internal successors, (4928), 11 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:31,889 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 587 flow. Second operand 10 states and 2004 transitions. [2023-11-06 21:55:31,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 174 transitions, 1266 flow [2023-11-06 21:55:31,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 174 transitions, 1250 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 21:55:31,914 INFO L231 Difference]: Finished difference. Result has 114 places, 95 transitions, 634 flow [2023-11-06 21:55:31,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=634, PETRI_PLACES=114, PETRI_TRANSITIONS=95} [2023-11-06 21:55:31,915 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2023-11-06 21:55:31,915 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 95 transitions, 634 flow [2023-11-06 21:55:31,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.4) internal successors, (1894), 10 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:31,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:31,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:31,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:32,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:32,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash 354765926, now seen corresponding path program 2 times [2023-11-06 21:55:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422675295] [2023-11-06 21:55:32,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:32,129 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 [2023-11-06 21:55:32,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:32,130 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:32,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 21:55:32,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:55:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:32,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:55:32,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:32,271 INFO L351 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 15 treesize of output 9 [2023-11-06 21:55:32,284 INFO L351 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 [2023-11-06 21:55:32,301 INFO L351 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 [2023-11-06 21:55:32,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:32,315 INFO L351 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 10 treesize of output 1 [2023-11-06 21:55:32,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:32,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:32,339 INFO L351 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 [2023-11-06 21:55:32,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:32,352 INFO L351 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 10 treesize of output 1 [2023-11-06 21:55:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:32,381 INFO L351 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 20 treesize of output 1 [2023-11-06 21:55:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:32,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:32,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:32,661 INFO L351 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 18 treesize of output 13 [2023-11-06 21:55:32,682 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 21:55:32,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 21:55:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:32,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:32,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422675295] [2023-11-06 21:55:32,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422675295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:32,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:32,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:55:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802242959] [2023-11-06 21:55:32,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:32,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:55:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:55:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:55:33,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 448 [2023-11-06 21:55:33,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 95 transitions, 634 flow. Second operand has 6 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:33,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:33,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 448 [2023-11-06 21:55:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:35,471 INFO L124 PetriNetUnfolderBase]: 3446/5548 cut-off events. [2023-11-06 21:55:35,471 INFO L125 PetriNetUnfolderBase]: For 13169/13169 co-relation queries the response was YES. [2023-11-06 21:55:35,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20460 conditions, 5548 events. 3446/5548 cut-off events. For 13169/13169 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 31007 event pairs, 1182 based on Foata normal form. 170/5140 useless extension candidates. Maximal degree in co-relation 20420. Up to 2932 conditions per place. [2023-11-06 21:55:35,513 INFO L140 encePairwiseOnDemand]: 440/448 looper letters, 111 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2023-11-06 21:55:35,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 154 transitions, 1237 flow [2023-11-06 21:55:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:55:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:55:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1343 transitions. [2023-11-06 21:55:35,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42825255102040816 [2023-11-06 21:55:35,519 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1343 transitions. [2023-11-06 21:55:35,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1343 transitions. [2023-11-06 21:55:35,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:35,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1343 transitions. [2023-11-06 21:55:35,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.85714285714286) internal successors, (1343), 7 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:35,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 448.0) internal successors, (3584), 8 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:35,526 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 448.0) internal successors, (3584), 8 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:35,526 INFO L175 Difference]: Start difference. First operand has 114 places, 95 transitions, 634 flow. Second operand 7 states and 1343 transitions. [2023-11-06 21:55:35,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 154 transitions, 1237 flow [2023-11-06 21:55:35,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1224 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 21:55:35,556 INFO L231 Difference]: Finished difference. Result has 119 places, 102 transitions, 778 flow [2023-11-06 21:55:35,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=778, PETRI_PLACES=119, PETRI_TRANSITIONS=102} [2023-11-06 21:55:35,557 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 45 predicate places. [2023-11-06 21:55:35,558 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 102 transitions, 778 flow [2023-11-06 21:55:35,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:35,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:35,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:35,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:35,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:35,776 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:35,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 354830902, now seen corresponding path program 1 times [2023-11-06 21:55:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030933430] [2023-11-06 21:55:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:35,777 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 [2023-11-06 21:55:35,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:35,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:35,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 21:55:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:35,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:55:35,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:35,936 INFO L351 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 20 treesize of output 9 [2023-11-06 21:55:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:35,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:35,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:35,979 INFO L351 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 10 treesize of output 1 [2023-11-06 21:55:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:35,990 INFO L351 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 10 treesize of output 1 [2023-11-06 21:55:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:36,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:36,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:37,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:37,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030933430] [2023-11-06 21:55:37,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030933430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:37,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:37,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 21:55:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632461697] [2023-11-06 21:55:37,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:55:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:55:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:55:41,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 448 [2023-11-06 21:55:41,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 102 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 187.8) internal successors, (1878), 10 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:41,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 448 [2023-11-06 21:55:41,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:45,656 INFO L124 PetriNetUnfolderBase]: 4010/6775 cut-off events. [2023-11-06 21:55:45,656 INFO L125 PetriNetUnfolderBase]: For 20360/20360 co-relation queries the response was YES. [2023-11-06 21:55:45,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25764 conditions, 6775 events. 4010/6775 cut-off events. For 20360/20360 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 41579 event pairs, 1753 based on Foata normal form. 9/6060 useless extension candidates. Maximal degree in co-relation 25721. Up to 4602 conditions per place. [2023-11-06 21:55:45,719 INFO L140 encePairwiseOnDemand]: 440/448 looper letters, 128 selfloop transitions, 52 changer transitions 0/191 dead transitions. [2023-11-06 21:55:45,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 191 transitions, 1732 flow [2023-11-06 21:55:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:55:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 21:55:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2905 transitions. [2023-11-06 21:55:45,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322916666666667 [2023-11-06 21:55:45,726 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2905 transitions. [2023-11-06 21:55:45,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2905 transitions. [2023-11-06 21:55:45,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:45,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2905 transitions. [2023-11-06 21:55:45,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 193.66666666666666) internal successors, (2905), 15 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:45,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 448.0) internal successors, (7168), 16 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:45,740 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 448.0) internal successors, (7168), 16 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:45,740 INFO L175 Difference]: Start difference. First operand has 119 places, 102 transitions, 778 flow. Second operand 15 states and 2905 transitions. [2023-11-06 21:55:45,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 191 transitions, 1732 flow [2023-11-06 21:55:45,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 191 transitions, 1665 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-06 21:55:45,782 INFO L231 Difference]: Finished difference. Result has 135 places, 135 transitions, 1158 flow [2023-11-06 21:55:45,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1158, PETRI_PLACES=135, PETRI_TRANSITIONS=135} [2023-11-06 21:55:45,783 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 61 predicate places. [2023-11-06 21:55:45,783 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 135 transitions, 1158 flow [2023-11-06 21:55:45,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 187.8) internal successors, (1878), 10 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:45,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:45,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:45,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:45,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:45,984 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:45,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:45,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1948275822, now seen corresponding path program 2 times [2023-11-06 21:55:45,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:45,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443286069] [2023-11-06 21:55:45,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:45,985 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 [2023-11-06 21:55:45,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:45,986 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 21:55:46,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:55:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:46,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:55:46,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:46,138 INFO L351 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 [2023-11-06 21:55:46,149 INFO L351 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 10 treesize of output 9 [2023-11-06 21:55:46,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:46,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:46,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:46,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:46,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:46,221 INFO L351 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 20 treesize of output 1 [2023-11-06 21:55:46,231 INFO L351 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 [2023-11-06 21:55:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:46,248 INFO L351 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 10 treesize of output 1 [2023-11-06 21:55:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:46,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:46,501 INFO L351 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 18 treesize of output 13 [2023-11-06 21:55:46,526 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 21:55:46,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 21:55:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:46,596 INFO L351 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 18 treesize of output 13 [2023-11-06 21:55:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:46,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:46,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443286069] [2023-11-06 21:55:46,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443286069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:46,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:46,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:55:46,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033730814] [2023-11-06 21:55:46,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:46,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:55:46,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:55:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:55:49,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 448 [2023-11-06 21:55:49,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 135 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:49,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:49,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 448 [2023-11-06 21:55:49,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:52,321 INFO L124 PetriNetUnfolderBase]: 5138/8940 cut-off events. [2023-11-06 21:55:52,321 INFO L125 PetriNetUnfolderBase]: For 39650/39650 co-relation queries the response was YES. [2023-11-06 21:55:52,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36466 conditions, 8940 events. 5138/8940 cut-off events. For 39650/39650 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 58570 event pairs, 1763 based on Foata normal form. 0/8064 useless extension candidates. Maximal degree in co-relation 36418. Up to 4425 conditions per place. [2023-11-06 21:55:52,393 INFO L140 encePairwiseOnDemand]: 437/448 looper letters, 159 selfloop transitions, 40 changer transitions 0/210 dead transitions. [2023-11-06 21:55:52,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 210 transitions, 2072 flow [2023-11-06 21:55:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:55:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:55:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1536 transitions. [2023-11-06 21:55:52,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-06 21:55:52,397 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1536 transitions. [2023-11-06 21:55:52,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1536 transitions. [2023-11-06 21:55:52,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:52,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1536 transitions. [2023-11-06 21:55:52,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:52,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 448.0) internal successors, (4032), 9 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:52,403 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 448.0) internal successors, (4032), 9 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:52,403 INFO L175 Difference]: Start difference. First operand has 135 places, 135 transitions, 1158 flow. Second operand 8 states and 1536 transitions. [2023-11-06 21:55:52,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 210 transitions, 2072 flow [2023-11-06 21:55:52,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 1951 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-11-06 21:55:52,535 INFO L231 Difference]: Finished difference. Result has 139 places, 145 transitions, 1239 flow [2023-11-06 21:55:52,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1239, PETRI_PLACES=139, PETRI_TRANSITIONS=145} [2023-11-06 21:55:52,536 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 65 predicate places. [2023-11-06 21:55:52,536 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 145 transitions, 1239 flow [2023-11-06 21:55:52,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:52,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:52,537 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 21:55:52,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:55:52,738 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:55:52,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1012304371, now seen corresponding path program 3 times [2023-11-06 21:55:52,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:55:52,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489477979] [2023-11-06 21:55:52,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:55:52,739 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 [2023-11-06 21:55:52,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:55:52,740 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:55:52,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 21:55:52,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 21:55:52,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:52,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:55:52,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:52,985 INFO L351 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 [2023-11-06 21:55:53,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:53,001 INFO L351 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 [2023-11-06 21:55:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:53,023 INFO L351 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 [2023-11-06 21:55:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:53,034 INFO L351 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 [2023-11-06 21:55:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:53,045 INFO L351 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 [2023-11-06 21:55:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:53,052 INFO L351 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 [2023-11-06 21:55:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:53,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:56,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:55:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489477979] [2023-11-06 21:55:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489477979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:56,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:56,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 21:55:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777584491] [2023-11-06 21:55:56,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:55:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:55:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:55:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:56:18,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 448 [2023-11-06 21:56:18,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 145 transitions, 1239 flow. Second operand has 24 states, 24 states have (on average 187.0) internal successors, (4488), 24 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:18,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 448 [2023-11-06 21:56:18,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:39,735 INFO L124 PetriNetUnfolderBase]: 5150/8854 cut-off events. [2023-11-06 21:56:39,735 INFO L125 PetriNetUnfolderBase]: For 42592/42592 co-relation queries the response was YES. [2023-11-06 21:56:39,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37811 conditions, 8854 events. 5150/8854 cut-off events. For 42592/42592 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 57436 event pairs, 3475 based on Foata normal form. 12/8024 useless extension candidates. Maximal degree in co-relation 37761. Up to 8201 conditions per place. [2023-11-06 21:56:39,881 INFO L140 encePairwiseOnDemand]: 444/448 looper letters, 113 selfloop transitions, 45 changer transitions 0/169 dead transitions. [2023-11-06 21:56:39,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 169 transitions, 1795 flow [2023-11-06 21:56:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:56:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 21:56:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4560 transitions. [2023-11-06 21:56:39,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42410714285714285 [2023-11-06 21:56:39,890 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4560 transitions. [2023-11-06 21:56:39,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4560 transitions. [2023-11-06 21:56:39,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:39,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4560 transitions. [2023-11-06 21:56:39,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 190.0) internal successors, (4560), 24 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:39,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 448.0) internal successors, (11200), 25 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:39,915 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 448.0) internal successors, (11200), 25 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:39,915 INFO L175 Difference]: Start difference. First operand has 139 places, 145 transitions, 1239 flow. Second operand 24 states and 4560 transitions. [2023-11-06 21:56:39,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 169 transitions, 1795 flow [2023-11-06 21:56:40,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 169 transitions, 1740 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:56:40,121 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 1578 flow [2023-11-06 21:56:40,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1578, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2023-11-06 21:56:40,121 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 97 predicate places. [2023-11-06 21:56:40,122 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 1578 flow [2023-11-06 21:56:40,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 187.0) internal successors, (4488), 24 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:40,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:40,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:40,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:40,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:56:40,324 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:56:40,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1406735392, now seen corresponding path program 1 times [2023-11-06 21:56:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:56:40,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667539422] [2023-11-06 21:56:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:40,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:56:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:56:40,326 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:56:40,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-06 21:56:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:40,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:56:40,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:40,540 INFO L351 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 [2023-11-06 21:56:40,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:40,557 INFO L351 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 [2023-11-06 21:56:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:40,588 INFO L351 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 [2023-11-06 21:56:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:40,602 INFO L351 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 [2023-11-06 21:56:40,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:40,614 INFO L351 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 [2023-11-06 21:56:40,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:40,628 INFO L351 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 [2023-11-06 21:56:40,750 INFO L351 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 13 treesize of output 9 [2023-11-06 21:56:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:40,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:41,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:56:41,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667539422] [2023-11-06 21:56:41,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667539422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:41,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:56:41,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 21:56:41,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530108190] [2023-11-06 21:56:41,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:56:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:56:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:56:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:56:44,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 448 [2023-11-06 21:56:44,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 1578 flow. Second operand has 14 states, 14 states have (on average 182.64285714285714) internal successors, (2557), 14 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:44,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:44,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 448 [2023-11-06 21:56:44,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:49,747 INFO L124 PetriNetUnfolderBase]: 7677/12906 cut-off events. [2023-11-06 21:56:49,747 INFO L125 PetriNetUnfolderBase]: For 65217/65241 co-relation queries the response was YES. [2023-11-06 21:56:49,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55187 conditions, 12906 events. 7677/12906 cut-off events. For 65217/65241 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 88718 event pairs, 2862 based on Foata normal form. 868/12501 useless extension candidates. Maximal degree in co-relation 55125. Up to 3877 conditions per place. [2023-11-06 21:56:49,879 INFO L140 encePairwiseOnDemand]: 439/448 looper letters, 405 selfloop transitions, 38 changer transitions 0/454 dead transitions. [2023-11-06 21:56:49,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 454 transitions, 4346 flow [2023-11-06 21:56:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:56:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 21:56:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2583 transitions. [2023-11-06 21:56:49,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44350961538461536 [2023-11-06 21:56:49,883 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2583 transitions. [2023-11-06 21:56:49,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2583 transitions. [2023-11-06 21:56:49,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:49,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2583 transitions. [2023-11-06 21:56:49,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 198.69230769230768) internal successors, (2583), 13 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 448.0) internal successors, (6272), 14 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,890 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 448.0) internal successors, (6272), 14 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,890 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 1578 flow. Second operand 13 states and 2583 transitions. [2023-11-06 21:56:49,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 454 transitions, 4346 flow [2023-11-06 21:56:50,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 454 transitions, 4204 flow, removed 50 selfloop flow, removed 11 redundant places. [2023-11-06 21:56:50,329 INFO L231 Difference]: Finished difference. Result has 176 places, 183 transitions, 1750 flow [2023-11-06 21:56:50,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1750, PETRI_PLACES=176, PETRI_TRANSITIONS=183} [2023-11-06 21:56:50,330 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 102 predicate places. [2023-11-06 21:56:50,330 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 183 transitions, 1750 flow [2023-11-06 21:56:50,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 182.64285714285714) internal successors, (2557), 14 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:50,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:50,330 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:50,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:50,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:56:50,531 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:56:50,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:50,531 INFO L85 PathProgramCache]: Analyzing trace with hash -971634885, now seen corresponding path program 2 times [2023-11-06 21:56:50,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:56:50,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578159770] [2023-11-06 21:56:50,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:56:50,532 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 [2023-11-06 21:56:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:56:50,533 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:56:50,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-06 21:56:50,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:56:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:50,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:56:50,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:50,739 INFO L351 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 15 treesize of output 9 [2023-11-06 21:56:50,748 INFO L351 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 [2023-11-06 21:56:50,770 INFO L351 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 10 treesize of output 9 [2023-11-06 21:56:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:50,782 INFO L351 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 [2023-11-06 21:56:50,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:50,810 INFO L351 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 20 treesize of output 1 [2023-11-06 21:56:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:50,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:56:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:50,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:56:50,851 INFO L351 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 10 treesize of output 9 [2023-11-06 21:56:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:50,866 INFO L351 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 [2023-11-06 21:56:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:51,067 INFO L351 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 18 treesize of output 13 [2023-11-06 21:56:51,082 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 21:56:51,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 21:56:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:51,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:55,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:56:55,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578159770] [2023-11-06 21:56:55,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578159770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:55,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:56:55,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 21:56:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360459318] [2023-11-06 21:56:55,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:55,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:56:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:56:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:56:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2023-11-06 21:56:58,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:00,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:05,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:08,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:11,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:13,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:15,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:18,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:21,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:23,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:26,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:29,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 448 [2023-11-06 21:57:29,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 183 transitions, 1750 flow. Second operand has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:29,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:29,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 448 [2023-11-06 21:57:29,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:47,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:55,738 INFO L124 PetriNetUnfolderBase]: 15254/24780 cut-off events. [2023-11-06 21:57:55,739 INFO L125 PetriNetUnfolderBase]: For 145173/145209 co-relation queries the response was YES. [2023-11-06 21:57:55,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117768 conditions, 24780 events. 15254/24780 cut-off events. For 145173/145209 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 175204 event pairs, 3210 based on Foata normal form. 1540/24078 useless extension candidates. Maximal degree in co-relation 117702. Up to 4911 conditions per place. [2023-11-06 21:57:56,072 INFO L140 encePairwiseOnDemand]: 439/448 looper letters, 530 selfloop transitions, 223 changer transitions 0/759 dead transitions. [2023-11-06 21:57:56,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 759 transitions, 7287 flow [2023-11-06 21:57:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:57:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 21:57:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4399 transitions. [2023-11-06 21:57:56,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276785714285717 [2023-11-06 21:57:56,079 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4399 transitions. [2023-11-06 21:57:56,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4399 transitions. [2023-11-06 21:57:56,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:56,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4399 transitions. [2023-11-06 21:57:56,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 175.96) internal successors, (4399), 25 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:56,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 448.0) internal successors, (11648), 26 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:56,092 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 448.0) internal successors, (11648), 26 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:56,092 INFO L175 Difference]: Start difference. First operand has 176 places, 183 transitions, 1750 flow. Second operand 25 states and 4399 transitions. [2023-11-06 21:57:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 759 transitions, 7287 flow [2023-11-06 21:57:57,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 759 transitions, 7174 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-11-06 21:57:57,303 INFO L231 Difference]: Finished difference. Result has 208 places, 322 transitions, 4076 flow [2023-11-06 21:57:57,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4076, PETRI_PLACES=208, PETRI_TRANSITIONS=322} [2023-11-06 21:57:57,305 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 134 predicate places. [2023-11-06 21:57:57,305 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 322 transitions, 4076 flow [2023-11-06 21:57:57,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:57,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:57,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:57,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:57,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:57:57,506 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-06 21:57:57,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash 312705318, now seen corresponding path program 1 times [2023-11-06 21:57:57,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:57:57,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613158229] [2023-11-06 21:57:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:57,508 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 [2023-11-06 21:57:57,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:57:57,509 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 21:57:57,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f5dc90-2ffc-4a3c-800b-dd7026d92a89/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-06 21:57:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:57,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:57:57,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:57,721 INFO L351 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 [2023-11-06 21:57:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:57,742 INFO L351 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 [2023-11-06 21:57:57,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:57,755 INFO L351 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 [2023-11-06 21:57:57,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:57,764 INFO L351 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 [2023-11-06 21:57:57,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:57,792 INFO L351 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 [2023-11-06 21:57:57,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:57,805 INFO L351 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 [2023-11-06 21:57:57,912 INFO L351 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 13 treesize of output 9 [2023-11-06 21:57:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:58,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:58,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:57:58,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613158229] [2023-11-06 21:57:58,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613158229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:58,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:58,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 21:57:58,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866791430] [2023-11-06 21:57:58,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:57:58,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:57:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:57:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:58:01,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 448 [2023-11-06 21:58:01,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 322 transitions, 4076 flow. Second operand has 14 states, 14 states have (on average 182.71428571428572) internal successors, (2558), 14 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:01,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:01,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 448 [2023-11-06 21:58:01,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand