./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.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_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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_733174f1-1c00-46c4-80b2-a33c9f438065/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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:20:33,071 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:20:33,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:20:33,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:20:33,197 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:20:33,231 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:20:33,233 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:20:33,233 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:20:33,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:20:33,239 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:20:33,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:20:33,241 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:20:33,242 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:20:33,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:20:33,244 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:20:33,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:20:33,245 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:20:33,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:20:33,246 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:20:33,247 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:20:33,247 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:20:33,248 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:20:33,248 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:20:33,249 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:20:33,249 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:20:33,250 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:20:33,251 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:20:33,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:20:33,252 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:20:33,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:20:33,253 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:20:33,254 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:20:33,254 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:20:33,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:20:33,255 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:20:33,255 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:20:33,255 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:20:33,256 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:20:33,256 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_733174f1-1c00-46c4-80b2-a33c9f438065/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2023-11-06 22:20:33,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:20:33,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:20:33,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:20:33,630 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:20:33,630 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:20:33,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-06 22:20:36,692 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:20:36,901 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:20:36,902 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-06 22:20:36,912 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data/dd59f4446/4ca4dd2d979041ae83e2ed668dc3a9fd/FLAGe0885d46e [2023-11-06 22:20:36,927 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data/dd59f4446/4ca4dd2d979041ae83e2ed668dc3a9fd [2023-11-06 22:20:36,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:20:36,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:20:36,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:20:36,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:20:36,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:20:36,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:36" (1/1) ... [2023-11-06 22:20:36,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c56c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:36, skipping insertion in model container [2023-11-06 22:20:36,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:36" (1/1) ... [2023-11-06 22:20:36,968 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:20:37,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:20:37,176 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 22:20:37,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@467648d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:37, skipping insertion in model container [2023-11-06 22:20:37,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:20:37,177 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:20:37,179 INFO L158 Benchmark]: Toolchain (without parser) took 246.91ms. Allocated memory is still 172.0MB. Free memory was 125.6MB in the beginning and 115.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:20:37,180 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:20:37,181 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.34ms. Allocated memory is still 172.0MB. Free memory was 125.0MB in the beginning and 115.8MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:20:37,183 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.34ms. Allocated memory is still 172.0MB. Free memory was 125.0MB in the beginning and 115.8MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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_733174f1-1c00-46c4-80b2-a33c9f438065/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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:20:39,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:20:39,667 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:20:39,673 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:20:39,674 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:20:39,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:20:39,708 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:20:39,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:20:39,710 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:20:39,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:20:39,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:20:39,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:20:39,714 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:20:39,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:20:39,719 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:20:39,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:20:39,720 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:20:39,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:20:39,721 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:20:39,722 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:20:39,723 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:20:39,724 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:20:39,724 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:20:39,725 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:20:39,725 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:20:39,725 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:20:39,726 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:20:39,726 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:20:39,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:20:39,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:20:39,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:20:39,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:20:39,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:20:39,730 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:20:39,731 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:20:39,731 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:20:39,731 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:20:39,732 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:20:39,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:20:39,733 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:20:39,733 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:20:39,734 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_733174f1-1c00-46c4-80b2-a33c9f438065/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2023-11-06 22:20:40,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:20:40,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:20:40,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:20:40,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:20:40,212 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:20:40,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-06 22:20:43,417 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:20:43,744 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:20:43,745 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-06 22:20:43,757 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data/b8e424de9/d24f71dc076549009463506dd9e4e6be/FLAG788ebe336 [2023-11-06 22:20:43,777 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/data/b8e424de9/d24f71dc076549009463506dd9e4e6be [2023-11-06 22:20:43,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:20:43,788 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:20:43,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:20:43,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:20:43,801 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:20:43,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:43" (1/1) ... [2023-11-06 22:20:43,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2e0f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:43, skipping insertion in model container [2023-11-06 22:20:43,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:43" (1/1) ... [2023-11-06 22:20:43,839 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:20:44,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:20:44,110 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:20:44,114 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:20:44,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:20:44,139 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:20:44,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:20:44,182 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:20:44,182 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:20:44,190 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:20:44,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44 WrapperNode [2023-11-06 22:20:44,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:20:44,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:20:44,193 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:20:44,193 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:20:44,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,262 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 203 [2023-11-06 22:20:44,262 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:20:44,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:20:44,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:20:44,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:20:44,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,280 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,294 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,302 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,304 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:20:44,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:20:44,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:20:44,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:20:44,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (1/1) ... [2023-11-06 22:20:44,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:20:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:44,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:20:44,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:20:44,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:20:44,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:20:44,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:20:44,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:20:44,381 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:20:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:20:44,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:20:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:20:44,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:20:44,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:20:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:20:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:20:44,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:20:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:20:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:20:44,385 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 22:20:44,508 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:20:44,511 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:20:45,231 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:20:45,444 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:20:45,444 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:20:45,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:20:45 BoogieIcfgContainer [2023-11-06 22:20:45,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:20:45,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:20:45,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:20:45,456 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:20:45,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:20:43" (1/3) ... [2023-11-06 22:20:45,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2900a3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:20:45, skipping insertion in model container [2023-11-06 22:20:45,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:44" (2/3) ... [2023-11-06 22:20:45,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2900a3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:20:45, skipping insertion in model container [2023-11-06 22:20:45,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:20:45" (3/3) ... [2023-11-06 22:20:45,464 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-11-06 22:20:45,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:20:45,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-06 22:20:45,486 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:20:45,601 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:20:45,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 203 transitions, 420 flow [2023-11-06 22:20:45,787 INFO L124 PetriNetUnfolderBase]: 13/201 cut-off events. [2023-11-06 22:20:45,788 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:20:45,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 201 events. 13/201 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 169 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2023-11-06 22:20:45,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 203 transitions, 420 flow [2023-11-06 22:20:45,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 196 transitions, 404 flow [2023-11-06 22:20:45,812 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:20:45,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 196 transitions, 404 flow [2023-11-06 22:20:45,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 196 transitions, 404 flow [2023-11-06 22:20:45,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 196 transitions, 404 flow [2023-11-06 22:20:45,895 INFO L124 PetriNetUnfolderBase]: 13/196 cut-off events. [2023-11-06 22:20:45,900 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:20:45,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 196 events. 13/196 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 170 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2023-11-06 22:20:45,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 1036 [2023-11-06 22:21:08,510 INFO L134 LiptonReduction]: Checked pairs total: 2778 [2023-11-06 22:21:08,511 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-11-06 22:21:08,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:21:08,533 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;@6f0eae4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:21:08,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-11-06 22:21:08,538 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:21:08,538 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:21:08,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:21:08,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:08,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:21:08,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:08,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 28827, now seen corresponding path program 1 times [2023-11-06 22:21:08,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:08,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940051689] [2023-11-06 22:21:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:08,559 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 22:21:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:08,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:08,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:08,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:21:08,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:08,836 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 22:21:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:08,864 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 22:21:08,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:08,883 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 22:21:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:08,901 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 22:21:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:08,925 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 22:21:08,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:08,950 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 22:21:08,984 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 22:21:08,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:08,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:08,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940051689] [2023-11-06 22:21:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940051689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:08,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:08,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:08,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866944317] [2023-11-06 22:21:08,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:08,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:09,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:09,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 418 [2023-11-06 22:21:09,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states 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 22:21:09,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:09,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 418 [2023-11-06 22:21:09,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:09,725 INFO L124 PetriNetUnfolderBase]: 406/673 cut-off events. [2023-11-06 22:21:09,725 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-06 22:21:09,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 673 events. 406/673 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 2952 event pairs, 336 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 1204. Up to 669 conditions per place. [2023-11-06 22:21:09,735 INFO L140 encePairwiseOnDemand]: 408/418 looper letters, 40 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-11-06 22:21:09,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 200 flow [2023-11-06 22:21:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-11-06 22:21:09,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-11-06 22:21:09,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-11-06 22:21:09,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-11-06 22:21:09,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:09,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-11-06 22:21:09,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 22:21:09,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:09,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:09,781 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 92 flow. Second operand 3 states and 539 transitions. [2023-11-06 22:21:09,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 200 flow [2023-11-06 22:21:09,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 192 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:21:09,792 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 138 flow [2023-11-06 22:21:09,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-11-06 22:21:09,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-06 22:21:09,798 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 138 flow [2023-11-06 22:21:09,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states 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 22:21:09,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:09,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:21:09,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:10,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:10,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:10,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 28826, now seen corresponding path program 1 times [2023-11-06 22:21:10,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:10,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790597341] [2023-11-06 22:21:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:10,020 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 22:21:10,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:10,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:10,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:10,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:21:10,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:10,096 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 22:21:10,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:10,106 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 22:21:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:10,126 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 22:21:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:10,138 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 22:21:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:10,154 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 6 treesize of output 1 [2023-11-06 22:21:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:10,166 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 22:21:10,171 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 22:21:10,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:10,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790597341] [2023-11-06 22:21:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790597341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:10,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:10,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:10,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174093492] [2023-11-06 22:21:10,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:10,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 418 [2023-11-06 22:21:10,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 22:21:10,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:10,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 418 [2023-11-06 22:21:10,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:10,658 INFO L124 PetriNetUnfolderBase]: 406/669 cut-off events. [2023-11-06 22:21:10,658 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:21:10,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1372 conditions, 669 events. 406/669 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 2923 event pairs, 336 based on Foata normal form. 4/219 useless extension candidates. Maximal degree in co-relation 1316. Up to 661 conditions per place. [2023-11-06 22:21:10,665 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 36 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2023-11-06 22:21:10,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 220 flow [2023-11-06 22:21:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-11-06 22:21:10,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258373205741627 [2023-11-06 22:21:10,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-11-06 22:21:10,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-11-06 22:21:10,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:10,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-11-06 22:21:10,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 22:21:10,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:10,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:10,679 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 138 flow. Second operand 3 states and 534 transitions. [2023-11-06 22:21:10,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 220 flow [2023-11-06 22:21:10,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:21:10,682 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 134 flow [2023-11-06 22:21:10,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-11-06 22:21:10,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-11-06 22:21:10,684 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 134 flow [2023-11-06 22:21:10,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 22:21:10,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:10,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:21:10,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:10,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:10,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:10,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash 27792906, now seen corresponding path program 1 times [2023-11-06 22:21:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:10,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500771981] [2023-11-06 22:21:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:10,910 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 22:21:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:10,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:10,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:11,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:11,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:11,102 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:21:11,103 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 22:21:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:11,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:11,140 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 17 treesize of output 11 [2023-11-06 22:21:11,198 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:21:11,199 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 14 treesize of output 20 [2023-11-06 22:21:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:21:11,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:11,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:11,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500771981] [2023-11-06 22:21:11,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500771981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:11,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:11,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804712493] [2023-11-06 22:21:11,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:11,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:11,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:11,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 418 [2023-11-06 22:21:11,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 22:21:11,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:11,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 418 [2023-11-06 22:21:11,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:11,726 INFO L124 PetriNetUnfolderBase]: 307/520 cut-off events. [2023-11-06 22:21:11,727 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:21:11,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 520 events. 307/520 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2160 event pairs, 252 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 1022. Up to 520 conditions per place. [2023-11-06 22:21:11,734 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-06 22:21:11,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 200 flow [2023-11-06 22:21:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-11-06 22:21:11,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43381180223285487 [2023-11-06 22:21:11,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-11-06 22:21:11,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-11-06 22:21:11,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:11,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-11-06 22:21:11,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 22:21:11,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:11,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:11,747 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 134 flow. Second operand 3 states and 544 transitions. [2023-11-06 22:21:11,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 200 flow [2023-11-06 22:21:11,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:21:11,750 INFO L231 Difference]: Finished difference. Result has 38 places, 40 transitions, 112 flow [2023-11-06 22:21:11,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2023-11-06 22:21:11,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-11-06 22:21:11,753 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 112 flow [2023-11-06 22:21:11,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 22:21:11,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:11,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:21:11,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:11,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:11,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:11,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:11,966 INFO L85 PathProgramCache]: Analyzing trace with hash 896532, now seen corresponding path program 1 times [2023-11-06 22:21:11,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610796754] [2023-11-06 22:21:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:11,967 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 22:21:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:11,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:11,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:12,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:21:12,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:12,124 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 22:21:12,136 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 22:21:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:12,166 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 22:21:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:12,214 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 22:21:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:12,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:12,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:12,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610796754] [2023-11-06 22:21:12,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610796754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:12,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:12,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:12,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099897637] [2023-11-06 22:21:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:12,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 418 [2023-11-06 22:21:12,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states 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 22:21:12,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:12,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 418 [2023-11-06 22:21:12,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:12,855 INFO L124 PetriNetUnfolderBase]: 208/371 cut-off events. [2023-11-06 22:21:12,856 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:21:12,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 371 events. 208/371 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1434 event pairs, 168 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 758. Up to 371 conditions per place. [2023-11-06 22:21:12,859 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-06 22:21:12,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 176 flow [2023-11-06 22:21:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-11-06 22:21:12,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43221690590111644 [2023-11-06 22:21:12,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-11-06 22:21:12,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-11-06 22:21:12,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:12,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-11-06 22:21:12,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 22:21:12,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:12,872 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:12,872 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 112 flow. Second operand 3 states and 542 transitions. [2023-11-06 22:21:12,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 176 flow [2023-11-06 22:21:12,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:12,874 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 103 flow [2023-11-06 22:21:12,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-06 22:21:12,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2023-11-06 22:21:12,875 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 103 flow [2023-11-06 22:21:12,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states 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 22:21:12,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:12,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:21:12,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:13,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:13,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:13,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 895122, now seen corresponding path program 1 times [2023-11-06 22:21:13,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:13,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638180022] [2023-11-06 22:21:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:13,090 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 22:21:13,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:13,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:13,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:13,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:21:13,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:13,205 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 22:21:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:13,246 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 22:21:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:13,257 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 22:21:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:13,269 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 22:21:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:13,279 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 22:21:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:13,290 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 13 treesize of output 1 [2023-11-06 22:21:13,361 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 22:21:13,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:13,621 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 22:21:13,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638180022] [2023-11-06 22:21:13,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638180022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:13,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:21:13,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:21:13,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518568474] [2023-11-06 22:21:13,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:13,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:21:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:21:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:21:14,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 418 [2023-11-06 22:21:14,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 22:21:14,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:14,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 418 [2023-11-06 22:21:14,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:16,406 INFO L124 PetriNetUnfolderBase]: 214/383 cut-off events. [2023-11-06 22:21:16,406 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:21:16,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 383 events. 214/383 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1504 event pairs, 168 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 794. Up to 372 conditions per place. [2023-11-06 22:21:16,410 INFO L140 encePairwiseOnDemand]: 411/418 looper letters, 32 selfloop transitions, 17 changer transitions 0/49 dead transitions. [2023-11-06 22:21:16,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 249 flow [2023-11-06 22:21:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:21:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:21:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 973 transitions. [2023-11-06 22:21:16,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879585326953748 [2023-11-06 22:21:16,430 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 973 transitions. [2023-11-06 22:21:16,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 973 transitions. [2023-11-06 22:21:16,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:16,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 973 transitions. [2023-11-06 22:21:16,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.16666666666666) internal successors, (973), 6 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 22:21:16,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 22:21:16,444 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 22:21:16,444 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 103 flow. Second operand 6 states and 973 transitions. [2023-11-06 22:21:16,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 249 flow [2023-11-06 22:21:16,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:16,448 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 220 flow [2023-11-06 22:21:16,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-11-06 22:21:16,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-06 22:21:16,452 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 220 flow [2023-11-06 22:21:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 22:21:16,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:16,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:21:16,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:16,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:16,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:16,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 861586363, now seen corresponding path program 1 times [2023-11-06 22:21:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:16,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031268342] [2023-11-06 22:21:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:16,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:21:16,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:16,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:16,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:16,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:21:16,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:16,764 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 22:21:16,783 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 22:21:16,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:16,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:16,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031268342] [2023-11-06 22:21:16,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031268342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:16,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:16,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:21:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129226077] [2023-11-06 22:21:16,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:16,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:16,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:16,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 418 [2023-11-06 22:21:16,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states 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 22:21:16,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:16,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 418 [2023-11-06 22:21:16,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:17,247 INFO L124 PetriNetUnfolderBase]: 167/302 cut-off events. [2023-11-06 22:21:17,248 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:21:17,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 302 events. 167/302 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1084 event pairs, 125 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 668. Up to 284 conditions per place. [2023-11-06 22:21:17,251 INFO L140 encePairwiseOnDemand]: 414/418 looper letters, 41 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-06 22:21:17,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 310 flow [2023-11-06 22:21:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:21:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2023-11-06 22:21:17,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409688995215311 [2023-11-06 22:21:17,255 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2023-11-06 22:21:17,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2023-11-06 22:21:17,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:17,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2023-11-06 22:21:17,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 22:21:17,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:21:17,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:21:17,263 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 220 flow. Second operand 4 states and 685 transitions. [2023-11-06 22:21:17,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 310 flow [2023-11-06 22:21:17,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 284 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:17,267 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 202 flow [2023-11-06 22:21:17,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-11-06 22:21:17,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-06 22:21:17,268 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 202 flow [2023-11-06 22:21:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states 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 22:21:17,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:17,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:21:17,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:17,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:17,489 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:17,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:17,489 INFO L85 PathProgramCache]: Analyzing trace with hash 861586364, now seen corresponding path program 1 times [2023-11-06 22:21:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:17,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490618114] [2023-11-06 22:21:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:17,490 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 22:21:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:17,491 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:17,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:17,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:21:17,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:17,633 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 22:21:17,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:17,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:17,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490618114] [2023-11-06 22:21:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490618114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:17,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:17,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:21:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653965411] [2023-11-06 22:21:17,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:17,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:17,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:17,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 418 [2023-11-06 22:21:17,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states 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 22:21:17,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:17,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 418 [2023-11-06 22:21:17,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:18,195 INFO L124 PetriNetUnfolderBase]: 203/389 cut-off events. [2023-11-06 22:21:18,195 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:21:18,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 389 events. 203/389 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1590 event pairs, 162 based on Foata normal form. 8/206 useless extension candidates. Maximal degree in co-relation 837. Up to 297 conditions per place. [2023-11-06 22:21:18,199 INFO L140 encePairwiseOnDemand]: 411/418 looper letters, 57 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2023-11-06 22:21:18,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 368 flow [2023-11-06 22:21:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:21:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 706 transitions. [2023-11-06 22:21:18,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222488038277512 [2023-11-06 22:21:18,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 706 transitions. [2023-11-06 22:21:18,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 706 transitions. [2023-11-06 22:21:18,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:18,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 706 transitions. [2023-11-06 22:21:18,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 22:21:18,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:21:18,210 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:21:18,211 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 202 flow. Second operand 4 states and 706 transitions. [2023-11-06 22:21:18,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 368 flow [2023-11-06 22:21:18,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 361 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:21:18,214 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 218 flow [2023-11-06 22:21:18,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-11-06 22:21:18,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-11-06 22:21:18,216 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 218 flow [2023-11-06 22:21:18,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states 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 22:21:18,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:18,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:21:18,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:18,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:18,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:18,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash 861586483, now seen corresponding path program 1 times [2023-11-06 22:21:18,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:18,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877676348] [2023-11-06 22:21:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:18,434 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 22:21:18,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:18,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:18,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:18,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:21:18,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:18,543 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:21:18,543 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 21 treesize of output 15 [2023-11-06 22:21:18,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:18,557 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:21:18,557 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:21:18,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:18,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:18,587 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:21:18,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 22:21:18,634 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:21:18,634 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 14 treesize of output 20 [2023-11-06 22:21:18,650 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 22:21:18,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:18,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:18,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877676348] [2023-11-06 22:21:18,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877676348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:18,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:18,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:18,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860834849] [2023-11-06 22:21:18,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:18,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:18,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:18,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:18,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 418 [2023-11-06 22:21:18,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 22:21:18,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:18,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 418 [2023-11-06 22:21:18,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:18,982 INFO L124 PetriNetUnfolderBase]: 186/353 cut-off events. [2023-11-06 22:21:18,982 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 22:21:18,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 353 events. 186/353 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1416 event pairs, 147 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 832. Up to 353 conditions per place. [2023-11-06 22:21:18,985 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-06 22:21:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 304 flow [2023-11-06 22:21:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-11-06 22:21:18,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-11-06 22:21:18,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-11-06 22:21:18,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-11-06 22:21:18,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:18,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-11-06 22:21:18,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 22:21:18,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:18,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:18,996 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 218 flow. Second operand 3 states and 532 transitions. [2023-11-06 22:21:18,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 304 flow [2023-11-06 22:21:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:18,999 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 208 flow [2023-11-06 22:21:18,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-11-06 22:21:19,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-11-06 22:21:19,000 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 208 flow [2023-11-06 22:21:19,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 22:21:19,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:19,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:21:19,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:19,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:19,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:19,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 861586485, now seen corresponding path program 1 times [2023-11-06 22:21:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:19,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162360562] [2023-11-06 22:21:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:19,214 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 22:21:19,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:19,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:19,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:19,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:21:19,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:19,358 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 22:21:19,372 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 22:21:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:19,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:19,398 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 22:21:19,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:21:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:19,441 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 22:21:19,525 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 22:21:19,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:19,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:19,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162360562] [2023-11-06 22:21:19,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162360562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:19,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:19,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570368292] [2023-11-06 22:21:19,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:19,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:19,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:19,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:19,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 418 [2023-11-06 22:21:19,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 168.25) internal successors, (673), 4 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 22:21:19,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:19,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 418 [2023-11-06 22:21:19,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:20,037 INFO L124 PetriNetUnfolderBase]: 169/317 cut-off events. [2023-11-06 22:21:20,037 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-06 22:21:20,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 317 events. 169/317 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1216 event pairs, 132 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 754. Up to 317 conditions per place. [2023-11-06 22:21:20,040 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-06 22:21:20,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 290 flow [2023-11-06 22:21:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-11-06 22:21:20,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226475279106858 [2023-11-06 22:21:20,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-11-06 22:21:20,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-11-06 22:21:20,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:20,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-11-06 22:21:20,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 22:21:20,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:20,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:20,050 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 208 flow. Second operand 3 states and 530 transitions. [2023-11-06 22:21:20,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 290 flow [2023-11-06 22:21:20,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:20,052 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 205 flow [2023-11-06 22:21:20,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-11-06 22:21:20,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-06 22:21:20,053 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 205 flow [2023-11-06 22:21:20,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.25) internal successors, (673), 4 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 22:21:20,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:20,054 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:21:20,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:20,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:20,266 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:20,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash 898250331, now seen corresponding path program 2 times [2023-11-06 22:21:20,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:20,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137580926] [2023-11-06 22:21:20,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:20,267 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 22:21:20,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:20,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:20,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:20,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:20,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:20,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:21:20,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:20,384 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 22:21:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:20,397 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 13 treesize of output 1 [2023-11-06 22:21:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:20,407 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 22:21:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:20,419 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 22:21:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:20,442 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 22:21:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:20,465 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 22:21:20,651 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 22:21:20,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:21,406 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 22:21:21,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:21,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137580926] [2023-11-06 22:21:21,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137580926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:21,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:21:21,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:21:21,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388389214] [2023-11-06 22:21:21,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:21,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:21:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:21:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:21:26,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 418 [2023-11-06 22:21:26,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 205 flow. Second operand has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:21:26,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:26,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 418 [2023-11-06 22:21:26,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:30,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:21:32,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:21:34,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:21:36,539 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 [] [2023-11-06 22:21:37,256 INFO L124 PetriNetUnfolderBase]: 178/335 cut-off events. [2023-11-06 22:21:37,256 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-06 22:21:37,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 335 events. 178/335 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1324 event pairs, 132 based on Foata normal form. 9/216 useless extension candidates. Maximal degree in co-relation 829. Up to 309 conditions per place. [2023-11-06 22:21:37,259 INFO L140 encePairwiseOnDemand]: 411/418 looper letters, 26 selfloop transitions, 35 changer transitions 0/61 dead transitions. [2023-11-06 22:21:37,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 438 flow [2023-11-06 22:21:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:21:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:21:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1930 transitions. [2023-11-06 22:21:37,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847687400318979 [2023-11-06 22:21:37,269 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1930 transitions. [2023-11-06 22:21:37,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1930 transitions. [2023-11-06 22:21:37,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:37,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1930 transitions. [2023-11-06 22:21:37,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.83333333333334) internal successors, (1930), 12 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states 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 22:21:37,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:21:37,290 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:21:37,291 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 205 flow. Second operand 12 states and 1930 transitions. [2023-11-06 22:21:37,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 438 flow [2023-11-06 22:21:37,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:37,295 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 436 flow [2023-11-06 22:21:37,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=436, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-06 22:21:37,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2023-11-06 22:21:37,296 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 436 flow [2023-11-06 22:21:37,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:21:37,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:37,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:21:37,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:37,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:37,506 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:37,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:37,506 INFO L85 PathProgramCache]: Analyzing trace with hash 939198963, now seen corresponding path program 1 times [2023-11-06 22:21:37,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:37,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441859352] [2023-11-06 22:21:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:37,507 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 22:21:37,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:37,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:37,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:37,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:21:37,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:37,635 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 22:21:37,796 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 22:21:37,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:38,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441859352] [2023-11-06 22:21:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441859352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:38,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:21:38,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 22:21:38,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517311974] [2023-11-06 22:21:38,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:38,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:21:38,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:21:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:21:41,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 418 [2023-11-06 22:21:41,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 436 flow. Second operand has 8 states, 8 states have (on average 150.375) internal successors, (1203), 8 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states 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 22:21:41,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:41,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 418 [2023-11-06 22:21:41,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:44,740 INFO L124 PetriNetUnfolderBase]: 368/671 cut-off events. [2023-11-06 22:21:44,740 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-06 22:21:44,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 671 events. 368/671 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3061 event pairs, 276 based on Foata normal form. 0/431 useless extension candidates. Maximal degree in co-relation 1625. Up to 253 conditions per place. [2023-11-06 22:21:44,746 INFO L140 encePairwiseOnDemand]: 411/418 looper letters, 88 selfloop transitions, 21 changer transitions 1/110 dead transitions. [2023-11-06 22:21:44,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 774 flow [2023-11-06 22:21:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:21:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:21:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1429 transitions. [2023-11-06 22:21:44,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798511430090378 [2023-11-06 22:21:44,753 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1429 transitions. [2023-11-06 22:21:44,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1429 transitions. [2023-11-06 22:21:44,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:44,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1429 transitions. [2023-11-06 22:21:44,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.77777777777777) internal successors, (1429), 9 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states 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 22:21:44,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 418.0) internal successors, (4180), 10 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states 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 22:21:44,769 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 418.0) internal successors, (4180), 10 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states 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 22:21:44,770 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 436 flow. Second operand 9 states and 1429 transitions. [2023-11-06 22:21:44,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 774 flow [2023-11-06 22:21:44,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 668 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-11-06 22:21:44,776 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 383 flow [2023-11-06 22:21:44,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=383, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-06 22:21:44,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2023-11-06 22:21:44,778 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 383 flow [2023-11-06 22:21:44,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 150.375) internal successors, (1203), 8 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states 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 22:21:44,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:44,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:44,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:44,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:44,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:44,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash -949602556, now seen corresponding path program 1 times [2023-11-06 22:21:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997014525] [2023-11-06 22:21:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:44,993 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 22:21:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:44,994 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:45,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:45,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:21:45,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:21:45,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:45,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997014525] [2023-11-06 22:21:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997014525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:45,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:45,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:45,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156778326] [2023-11-06 22:21:45,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:45,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:45,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 418 [2023-11-06 22:21:45,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 22:21:45,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:45,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 418 [2023-11-06 22:21:45,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:45,528 INFO L124 PetriNetUnfolderBase]: 470/871 cut-off events. [2023-11-06 22:21:45,529 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2023-11-06 22:21:45,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 871 events. 470/871 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4279 event pairs, 184 based on Foata normal form. 30/625 useless extension candidates. Maximal degree in co-relation 2092. Up to 539 conditions per place. [2023-11-06 22:21:45,537 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 71 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-11-06 22:21:45,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 73 transitions, 563 flow [2023-11-06 22:21:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-11-06 22:21:45,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-11-06 22:21:45,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-11-06 22:21:45,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-11-06 22:21:45,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:45,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-11-06 22:21:45,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 22:21:45,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:45,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:21:45,547 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 383 flow. Second operand 3 states and 561 transitions. [2023-11-06 22:21:45,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 73 transitions, 563 flow [2023-11-06 22:21:45,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 546 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:45,552 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 382 flow [2023-11-06 22:21:45,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-11-06 22:21:45,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2023-11-06 22:21:45,554 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 382 flow [2023-11-06 22:21:45,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 22:21:45,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:45,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:45,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:45,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:45,766 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:45,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:45,766 INFO L85 PathProgramCache]: Analyzing trace with hash -944055988, now seen corresponding path program 1 times [2023-11-06 22:21:45,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:45,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794571683] [2023-11-06 22:21:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:45,767 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 22:21:45,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:45,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:45,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:45,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:21:45,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:45,935 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 22:21:45,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:21:45,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:45,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794571683] [2023-11-06 22:21:45,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794571683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:45,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:45,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392956798] [2023-11-06 22:21:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:46,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 418 [2023-11-06 22:21:46,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 382 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 22:21:46,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:46,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 418 [2023-11-06 22:21:46,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:46,538 INFO L124 PetriNetUnfolderBase]: 534/1044 cut-off events. [2023-11-06 22:21:46,539 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2023-11-06 22:21:46,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 1044 events. 534/1044 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5563 event pairs, 444 based on Foata normal form. 32/868 useless extension candidates. Maximal degree in co-relation 2729. Up to 870 conditions per place. [2023-11-06 22:21:46,551 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 87 selfloop transitions, 3 changer transitions 1/91 dead transitions. [2023-11-06 22:21:46,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 729 flow [2023-11-06 22:21:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:21:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-11-06 22:21:46,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180622009569378 [2023-11-06 22:21:46,555 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-11-06 22:21:46,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-11-06 22:21:46,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:46,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-11-06 22:21:46,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 22:21:46,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:21:46,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:21:46,582 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 382 flow. Second operand 4 states and 699 transitions. [2023-11-06 22:21:46,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 729 flow [2023-11-06 22:21:46,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:46,589 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 393 flow [2023-11-06 22:21:46,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=393, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-11-06 22:21:46,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2023-11-06 22:21:46,590 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 393 flow [2023-11-06 22:21:46,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 22:21:46,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:46,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:46,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:46,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:46,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:21:46,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1205142453, now seen corresponding path program 1 times [2023-11-06 22:21:46,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:46,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353906484] [2023-11-06 22:21:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:46,805 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 22:21:46,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:46,806 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:46,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:21:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:46,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:21:46,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:46,969 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 22:21:46,979 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 11 treesize of output 7 [2023-11-06 22:21:46,998 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 22:21:47,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:47,012 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 22:21:47,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:47,030 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 22:21:47,040 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 22:21:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:47,054 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 22:21:47,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:47,088 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 22:21:47,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:47,104 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 22:21:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:21:47,248 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 16 treesize of output 11 [2023-11-06 22:21:47,263 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:21:47,264 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 22:21:47,373 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 22:21:47,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:48,364 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 22:21:48,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:48,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353906484] [2023-11-06 22:21:48,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353906484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:48,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:21:48,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:21:48,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35950236] [2023-11-06 22:21:48,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:48,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:21:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:21:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:21:52,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:21:59,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:22:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 418 [2023-11-06 22:22:01,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:01,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:01,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 418 [2023-11-06 22:22:01,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:04,372 WARN L539 Checker$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 22:22:11,868 INFO L124 PetriNetUnfolderBase]: 1192/2288 cut-off events. [2023-11-06 22:22:11,868 INFO L125 PetriNetUnfolderBase]: For 1293/1293 co-relation queries the response was YES. [2023-11-06 22:22:11,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 2288 events. 1192/2288 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13869 event pairs, 978 based on Foata normal form. 0/2094 useless extension candidates. Maximal degree in co-relation 6267. Up to 862 conditions per place. [2023-11-06 22:22:11,890 INFO L140 encePairwiseOnDemand]: 409/418 looper letters, 117 selfloop transitions, 19 changer transitions 0/136 dead transitions. [2023-11-06 22:22:11,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 136 transitions, 1079 flow [2023-11-06 22:22:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:22:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:22:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1827 transitions. [2023-11-06 22:22:11,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3642344497607656 [2023-11-06 22:22:11,899 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1827 transitions. [2023-11-06 22:22:11,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1827 transitions. [2023-11-06 22:22:11,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:11,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1827 transitions. [2023-11-06 22:22:11,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 152.25) internal successors, (1827), 12 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states 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 22:22:11,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:22:11,917 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 22:22:11,917 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 393 flow. Second operand 12 states and 1827 transitions. [2023-11-06 22:22:11,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 136 transitions, 1079 flow [2023-11-06 22:22:11,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 136 transitions, 1053 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:11,928 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 529 flow [2023-11-06 22:22:11,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=529, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-11-06 22:22:11,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2023-11-06 22:22:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 529 flow [2023-11-06 22:22:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 22:22:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:11,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:11,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:12,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:22:12,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1205142452, now seen corresponding path program 1 times [2023-11-06 22:22:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:22:12,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520718876] [2023-11-06 22:22:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:12,136 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 22:22:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:22:12,137 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:12,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:12,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:22:12,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:12,278 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 22:22:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:12,287 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 22:22:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:12,297 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 22:22:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:12,305 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 22:22:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:12,326 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 22:22:12,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:12,337 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 22:22:12,398 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:22:12,398 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 14 treesize of output 20 [2023-11-06 22:22:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:22:12,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:12,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:22:12,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520718876] [2023-11-06 22:22:12,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520718876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:12,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:12,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:22:12,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30763656] [2023-11-06 22:22:12,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:12,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:22:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:12,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 418 [2023-11-06 22:22:12,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 529 flow. Second operand has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 22:22:12,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:12,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 418 [2023-11-06 22:22:12,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:13,375 INFO L124 PetriNetUnfolderBase]: 841/1673 cut-off events. [2023-11-06 22:22:13,375 INFO L125 PetriNetUnfolderBase]: For 1517/1517 co-relation queries the response was YES. [2023-11-06 22:22:13,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4842 conditions, 1673 events. 841/1673 cut-off events. For 1517/1517 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9810 event pairs, 663 based on Foata normal form. 180/1845 useless extension candidates. Maximal degree in co-relation 4808. Up to 1613 conditions per place. [2023-11-06 22:22:13,397 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 45 selfloop transitions, 23 changer transitions 0/68 dead transitions. [2023-11-06 22:22:13,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 68 transitions, 657 flow [2023-11-06 22:22:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:22:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:22:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2023-11-06 22:22:13,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028708133971292 [2023-11-06 22:22:13,403 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2023-11-06 22:22:13,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2023-11-06 22:22:13,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:13,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2023-11-06 22:22:13,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states 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 22:22:13,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 418.0) internal successors, (2508), 6 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states 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 22:22:13,413 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 418.0) internal successors, (2508), 6 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states 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 22:22:13,413 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 529 flow. Second operand 5 states and 842 transitions. [2023-11-06 22:22:13,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 68 transitions, 657 flow [2023-11-06 22:22:13,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 68 transitions, 631 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 22:22:13,425 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 541 flow [2023-11-06 22:22:13,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=541, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2023-11-06 22:22:13,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2023-11-06 22:22:13,426 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 541 flow [2023-11-06 22:22:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 22:22:13,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:13,427 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-06 22:22:13,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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)] Ended with exit code 0 [2023-11-06 22:22:13,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:13,640 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:22:13,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2086017404, now seen corresponding path program 2 times [2023-11-06 22:22:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:22:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294426897] [2023-11-06 22:22:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:22:13,641 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 22:22:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:22:13,642 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:13,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:13,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:22:13,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:13,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:22:13,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:13,793 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 22:22:13,962 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 22:22:13,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:13,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:22:13,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294426897] [2023-11-06 22:22:13,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294426897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:13,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:13,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683238794] [2023-11-06 22:22:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:13,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:22:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:14,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 418 [2023-11-06 22:22:14,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 541 flow. Second operand has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 22:22:14,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:14,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 418 [2023-11-06 22:22:14,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:15,086 INFO L124 PetriNetUnfolderBase]: 733/1487 cut-off events. [2023-11-06 22:22:15,086 INFO L125 PetriNetUnfolderBase]: For 1404/1404 co-relation queries the response was YES. [2023-11-06 22:22:15,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 1487 events. 733/1487 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8576 event pairs, 567 based on Foata normal form. 72/1559 useless extension candidates. Maximal degree in co-relation 4156. Up to 1427 conditions per place. [2023-11-06 22:22:15,102 INFO L140 encePairwiseOnDemand]: 414/418 looper letters, 44 selfloop transitions, 22 changer transitions 0/66 dead transitions. [2023-11-06 22:22:15,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 66 transitions, 657 flow [2023-11-06 22:22:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:22:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:22:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 677 transitions. [2023-11-06 22:22:15,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4049043062200957 [2023-11-06 22:22:15,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 677 transitions. [2023-11-06 22:22:15,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 677 transitions. [2023-11-06 22:22:15,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:15,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 677 transitions. [2023-11-06 22:22:15,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 22:22:15,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:22:15,115 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:22:15,116 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 541 flow. Second operand 4 states and 677 transitions. [2023-11-06 22:22:15,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 66 transitions, 657 flow [2023-11-06 22:22:15,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 66 transitions, 618 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 22:22:15,165 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 530 flow [2023-11-06 22:22:15,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=530, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2023-11-06 22:22:15,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2023-11-06 22:22:15,166 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 530 flow [2023-11-06 22:22:15,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 22:22:15,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:15,167 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2023-11-06 22:22:15,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:15,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:15,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:22:15,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 241849657, now seen corresponding path program 1 times [2023-11-06 22:22:15,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:22:15,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321004675] [2023-11-06 22:22:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,378 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 22:22:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:22:15,379 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:15,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:15,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:22:15,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:15,521 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 22:22:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:16,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:18,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:22:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321004675] [2023-11-06 22:22:18,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321004675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:18,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:22:18,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-11-06 22:22:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23410670] [2023-11-06 22:22:18,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:18,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:22:18,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:22:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:22:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:22:31,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 418 [2023-11-06 22:22:31,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 530 flow. Second operand has 18 states, 18 states have (on average 156.05555555555554) internal successors, (2809), 18 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states 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 22:22:31,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:31,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 418 [2023-11-06 22:22:31,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:38,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:22:40,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:22:42,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:22:44,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:22:46,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:22:48,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:22:50,133 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 [] [2023-11-06 22:22:55,720 INFO L124 PetriNetUnfolderBase]: 769/1559 cut-off events. [2023-11-06 22:22:55,720 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2023-11-06 22:22:55,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4616 conditions, 1559 events. 769/1559 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9069 event pairs, 567 based on Foata normal form. 36/1595 useless extension candidates. Maximal degree in co-relation 4584. Up to 1480 conditions per place. [2023-11-06 22:22:55,733 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 26 selfloop transitions, 58 changer transitions 0/84 dead transitions. [2023-11-06 22:22:55,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 84 transitions, 842 flow [2023-11-06 22:22:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:22:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:22:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2872 transitions. [2023-11-06 22:22:55,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38171185539606595 [2023-11-06 22:22:55,747 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2872 transitions. [2023-11-06 22:22:55,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2872 transitions. [2023-11-06 22:22:55,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:55,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2872 transitions. [2023-11-06 22:22:55,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 159.55555555555554) internal successors, (2872), 18 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states 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 22:22:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 418.0) internal successors, (7942), 19 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states 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 22:22:55,773 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 418.0) internal successors, (7942), 19 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states 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 22:22:55,773 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 530 flow. Second operand 18 states and 2872 transitions. [2023-11-06 22:22:55,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 84 transitions, 842 flow [2023-11-06 22:22:55,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 800 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:55,785 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 839 flow [2023-11-06 22:22:55,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=839, PETRI_PLACES=103, PETRI_TRANSITIONS=84} [2023-11-06 22:22:55,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2023-11-06 22:22:55,786 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 839 flow [2023-11-06 22:22:55,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 156.05555555555554) internal successors, (2809), 18 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states 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 22:22:55,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:55,787 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:55,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:56,000 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:22:56,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 304524172, now seen corresponding path program 2 times [2023-11-06 22:22:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:22:56,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058512640] [2023-11-06 22:22:56,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:22:56,001 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 22:22:56,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:22:56,002 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:56,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:56,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:22:56,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:56,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:22:56,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:56,153 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 22:22:56,165 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 22:22:56,181 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 22:22:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:56,194 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 22:22:56,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:56,232 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 22:22:56,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:56,250 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 22:22:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:56,270 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 22:22:56,281 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 22:22:56,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:56,294 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 22:22:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:56,454 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 16 treesize of output 11 [2023-11-06 22:22:56,482 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:22:56,482 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 22:22:56,577 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 22:22:56,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:56,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:22:56,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058512640] [2023-11-06 22:22:56,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058512640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:56,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:56,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:22:56,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795642279] [2023-11-06 22:22:56,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:56,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:22:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:56,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 418 [2023-11-06 22:22:56,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 84 transitions, 839 flow. Second operand has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 22:22:56,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:56,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 418 [2023-11-06 22:22:56,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:57,412 INFO L124 PetriNetUnfolderBase]: 667/1379 cut-off events. [2023-11-06 22:22:57,412 INFO L125 PetriNetUnfolderBase]: For 1326/1326 co-relation queries the response was YES. [2023-11-06 22:22:57,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 1379 events. 667/1379 cut-off events. For 1326/1326 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7980 event pairs, 477 based on Foata normal form. 72/1443 useless extension candidates. Maximal degree in co-relation 4198. Up to 1366 conditions per place. [2023-11-06 22:22:57,425 INFO L140 encePairwiseOnDemand]: 414/418 looper letters, 70 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2023-11-06 22:22:57,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 82 transitions, 987 flow [2023-11-06 22:22:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:22:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:22:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 659 transitions. [2023-11-06 22:22:57,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39413875598086123 [2023-11-06 22:22:57,429 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 659 transitions. [2023-11-06 22:22:57,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 659 transitions. [2023-11-06 22:22:57,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:57,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 659 transitions. [2023-11-06 22:22:57,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 22:22:57,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:22:57,436 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states 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 22:22:57,436 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 839 flow. Second operand 4 states and 659 transitions. [2023-11-06 22:22:57,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 82 transitions, 987 flow [2023-11-06 22:22:57,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 847 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-11-06 22:22:57,452 INFO L231 Difference]: Finished difference. Result has 96 places, 82 transitions, 707 flow [2023-11-06 22:22:57,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=707, PETRI_PLACES=96, PETRI_TRANSITIONS=82} [2023-11-06 22:22:57,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2023-11-06 22:22:57,454 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 82 transitions, 707 flow [2023-11-06 22:22:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 22:22:57,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:57,454 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 22:22:57,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:57,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:57,666 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:22:57,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash -18531589, now seen corresponding path program 3 times [2023-11-06 22:22:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:22:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797197988] [2023-11-06 22:22:57,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:22:57,667 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 22:22:57,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:22:57,668 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:57,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:22:57,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:22:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:57,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:22:57,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:57,928 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 22:22:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:57,948 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 22:22:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:57,959 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 22:22:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:57,973 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 22:22:57,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:57,988 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 22:22:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:57,999 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 22:22:58,719 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 22:22:58,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:02,577 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 22:23:02,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797197988] [2023-11-06 22:23:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797197988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:02,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:02,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 22:23:02,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325038707] [2023-11-06 22:23:02,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:23:02,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:23:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:23:29,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 418 [2023-11-06 22:23:29,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 82 transitions, 707 flow. Second operand has 24 states, 24 states have (on average 156.0) internal successors, (3744), 24 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 22:23:29,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:29,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 418 [2023-11-06 22:23:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:46,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:23:48,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:23:50,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:23:52,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:23:54,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:23:56,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:23:58,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:23:59,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:01,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:24:03,923 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 [] [2023-11-06 22:24:11,204 INFO L124 PetriNetUnfolderBase]: 679/1403 cut-off events. [2023-11-06 22:24:11,204 INFO L125 PetriNetUnfolderBase]: For 1865/1865 co-relation queries the response was YES. [2023-11-06 22:24:11,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4152 conditions, 1403 events. 679/1403 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8072 event pairs, 477 based on Foata normal form. 12/1411 useless extension candidates. Maximal degree in co-relation 4111. Up to 1311 conditions per place. [2023-11-06 22:24:11,218 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 29 selfloop transitions, 77 changer transitions 0/106 dead transitions. [2023-11-06 22:24:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 106 transitions, 1099 flow [2023-11-06 22:24:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:24:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:24:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3823 transitions. [2023-11-06 22:24:11,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810805422647528 [2023-11-06 22:24:11,225 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3823 transitions. [2023-11-06 22:24:11,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3823 transitions. [2023-11-06 22:24:11,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:11,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3823 transitions. [2023-11-06 22:24:11,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 159.29166666666666) internal successors, (3823), 24 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states 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 22:24:11,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 418.0) internal successors, (10450), 25 states have internal predecessors, (10450), 0 states have call successors, (0), 0 states 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 22:24:11,245 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 418.0) internal successors, (10450), 25 states have internal predecessors, (10450), 0 states have call successors, (0), 0 states 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 22:24:11,245 INFO L175 Difference]: Start difference. First operand has 96 places, 82 transitions, 707 flow. Second operand 24 states and 3823 transitions. [2023-11-06 22:24:11,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 106 transitions, 1099 flow [2023-11-06 22:24:11,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 106 transitions, 1074 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:24:11,264 INFO L231 Difference]: Finished difference. Result has 129 places, 106 transitions, 1087 flow [2023-11-06 22:24:11,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1087, PETRI_PLACES=129, PETRI_TRANSITIONS=106} [2023-11-06 22:24:11,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2023-11-06 22:24:11,265 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 106 transitions, 1087 flow [2023-11-06 22:24:11,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 156.0) internal successors, (3744), 24 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 22:24:11,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:11,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:11,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:11,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:11,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:24:11,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash -797226109, now seen corresponding path program 1 times [2023-11-06 22:24:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:11,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728430836] [2023-11-06 22:24:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:11,481 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 22:24:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:11,483 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:11,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:11,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:24:11,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:11,715 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 22:24:11,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:11,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728430836] [2023-11-06 22:24:11,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728430836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:11,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:11,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126758002] [2023-11-06 22:24:11,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:11,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:11,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:11,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 418 [2023-11-06 22:24:11,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 106 transitions, 1087 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 22:24:11,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:11,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 418 [2023-11-06 22:24:11,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:12,263 INFO L124 PetriNetUnfolderBase]: 778/1558 cut-off events. [2023-11-06 22:24:12,263 INFO L125 PetriNetUnfolderBase]: For 1346/1346 co-relation queries the response was YES. [2023-11-06 22:24:12,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 1558 events. 778/1558 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8817 event pairs, 315 based on Foata normal form. 16/1570 useless extension candidates. Maximal degree in co-relation 4738. Up to 937 conditions per place. [2023-11-06 22:24:12,280 INFO L140 encePairwiseOnDemand]: 414/418 looper letters, 107 selfloop transitions, 3 changer transitions 5/115 dead transitions. [2023-11-06 22:24:12,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 115 transitions, 1343 flow [2023-11-06 22:24:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-11-06 22:24:12,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44417862838915473 [2023-11-06 22:24:12,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-11-06 22:24:12,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-11-06 22:24:12,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:12,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-11-06 22:24:12,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 22:24:12,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:24:12,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:24:12,290 INFO L175 Difference]: Start difference. First operand has 129 places, 106 transitions, 1087 flow. Second operand 3 states and 557 transitions. [2023-11-06 22:24:12,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 115 transitions, 1343 flow [2023-11-06 22:24:12,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 115 transitions, 1194 flow, removed 33 selfloop flow, removed 9 redundant places. [2023-11-06 22:24:12,350 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 912 flow [2023-11-06 22:24:12,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=912, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2023-11-06 22:24:12,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2023-11-06 22:24:12,352 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 912 flow [2023-11-06 22:24:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 22:24:12,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:12,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:12,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:12,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:12,569 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:24:12,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:12,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1964384269, now seen corresponding path program 1 times [2023-11-06 22:24:12,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:12,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290018060] [2023-11-06 22:24:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:12,570 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 22:24:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:12,571 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:12,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:12,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:24:12,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:24:12,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:12,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:12,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290018060] [2023-11-06 22:24:12,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290018060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:12,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:12,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981155976] [2023-11-06 22:24:12,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:12,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:12,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:12,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 418 [2023-11-06 22:24:12,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 912 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 22:24:12,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:12,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 418 [2023-11-06 22:24:12,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:13,199 INFO L124 PetriNetUnfolderBase]: 670/1360 cut-off events. [2023-11-06 22:24:13,199 INFO L125 PetriNetUnfolderBase]: For 1726/1726 co-relation queries the response was YES. [2023-11-06 22:24:13,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 1360 events. 670/1360 cut-off events. For 1726/1726 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7650 event pairs, 234 based on Foata normal form. 54/1410 useless extension candidates. Maximal degree in co-relation 4308. Up to 757 conditions per place. [2023-11-06 22:24:13,209 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 108 selfloop transitions, 2 changer transitions 5/115 dead transitions. [2023-11-06 22:24:13,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 115 transitions, 1171 flow [2023-11-06 22:24:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2023-11-06 22:24:13,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-11-06 22:24:13,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2023-11-06 22:24:13,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2023-11-06 22:24:13,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:13,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2023-11-06 22:24:13,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 22:24:13,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:24:13,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 22:24:13,216 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 912 flow. Second operand 3 states and 551 transitions. [2023-11-06 22:24:13,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 115 transitions, 1171 flow [2023-11-06 22:24:13,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 115 transitions, 1168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:24:13,234 INFO L231 Difference]: Finished difference. Result has 123 places, 106 transitions, 923 flow [2023-11-06 22:24:13,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=923, PETRI_PLACES=123, PETRI_TRANSITIONS=106} [2023-11-06 22:24:13,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2023-11-06 22:24:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 106 transitions, 923 flow [2023-11-06 22:24:13,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 22:24:13,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:13,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:13,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:13,445 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:24:13,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash -755705222, now seen corresponding path program 1 times [2023-11-06 22:24:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:13,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197989224] [2023-11-06 22:24:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:13,446 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 22:24:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:13,447 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:13,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_733174f1-1c00-46c4-80b2-a33c9f438065/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 22:24:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:13,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:24:13,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:24:14,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:24,883 WARN L293 SmtUtils]: Spent 10.14s on a formula simplification. DAG size of input: 392 DAG size of output: 285 (called from [L 319] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-06 22:24:24,884 INFO L322 Elim1Store]: treesize reduction 397, result has 76.6 percent of original size [2023-11-06 22:24:24,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 176 treesize of output 1335